Author: yanweilimin

  • Common Adapter Types for Excavators

    Excavator Tooth Adapter Types

    Excavator tooth adapters differ in how they attach to the bucket, where they sit on the cutting edge, and which tooth-and-lock system they support.

    Names such as weld-on, lip-mounted, flush-mounted, center, or corner describe useful features, but they do not identify an interchangeable part by themselves. The exact mounting geometry and tooth system must still be confirmed.

    This guide explains the broad adapter types and the checks buyers should make before ordering a replacement.

    What an Excavator Adapter Does

    The adapter connects a replaceable bucket tooth to the bucket structure. Its nose supports the tooth, while its retaining features position the lock.

    The adapter must match both the bucket mounting arrangement and the intended tooth system. A part that satisfies only one of those requirements is not the correct replacement.

    For the wider context of teeth, adapters, locks, cutting edges, and other ground-engaging components, see Wear Parts for Construction Equipment.

    Weld-On Adapters

    Some adapters are attached to the bucket by welding. Their mounting surfaces must suit the bucket lip or other specified structure, and their position affects tooth alignment.

    Do not select a weld-on adapter from the tooth size alone. Confirm the bucket-side dimensions, adapter position, material requirements, and approved installation procedure.

    Welding and structural repair should follow the applicable manufacturer instructions and qualified practice.

    Lip-Mount and Flush-Mount Arrangements

    Adapter mounting designs may position the component differently around or along the bucket lip. These arrangements affect the mounting contact, installed height, and tooth position.

    Terms such as “lip mount” or “flush mount” are not complete specifications. Verify the actual drawing, mounting dimensions, bucket lip thickness, and intended tooth system for the part being ordered.

    Center and Corner Positions

    Bucket position matters. A center adapter and a corner adapter may serve different geometry and protection needs even within the same bucket assembly.

    Record the exact position of the part being replaced. Photograph the adapter in place before removal and compare its mounting shape with the proposed replacement.

    Do not assume all positions on a bucket use the same adapter reference.

    Pin and Retainer Compatibility

    Adapters are designed for a particular tooth and locking arrangement. Similar adapter noses may use different lock openings, pin directions, or retainer locations.

    Confirm the adapter, tooth, and lock references as one system. If the tooth seats but the lock cannot align naturally, stop and check the combination rather than forcing installation.

    OEM and Aftermarket Variations

    An aftermarket adapter may be designed as a replacement for a specific existing system. That does not mean every visually similar adapter is interchangeable.

    Check the exact cross-reference, bucket mounting dimensions, intended tooth, and required lock. For replacement-tooth cross-references, see How to Verify OEM and Aftermarket Bucket Tooth Interchangeability.

    What to Check Before Ordering

    • Existing adapter part number or casting mark
    • Bucket-side mounting shape and dimensions
    • Position on the bucket
    • Tooth system and size
    • Lock and retainer references
    • Machine, bucket, and operating application

    Use How to Choose the Right Tooth Adapter for the complete selection sequence.

    Common Buying Mistakes

    Buyers may order by machine model alone, ignore a previous bucket modification, overlook the difference between center and corner positions, or select an adapter that matches the tooth but not the bucket.

    Another mistake is replacing an adapter without confirming whether its old tooth and lock are still appropriate. See the adapter replacement signs when wear is part of the decision.

    Adapter Identification

    The Type Is Only the Starting Point

    Broad adapter names help narrow the search, but the final selection depends on exact mounting geometry, bucket position, tooth system, and lock compatibility.

    When references are missing, document the installed assembly and obtain a system-specific fitment review before ordering or modifying parts.

    Need Help Identifying an Adapter Type?

    Send the existing part reference, bucket position, mounting measurements, and clear photos of the adapter, bucket lip, tooth, and lock.

    Get Fitment Help
    • Adapter reference and bucket position
    • Mounting measurements and photos
    • Tooth system and lock reference
    • Machine, application, and quantity
  • How Long Do Bucket Teeth Last

    Bucket Tooth Service Life

    There is no single number of hours that applies to every bucket tooth. Service life depends on the tooth profile, material and heat treatment, working conditions, machine use, adapter fitment, maintenance, and the point at which the tooth is removed.

    Two identical teeth can produce very different service lives when one works in abrasive material and the other in lower-abrasion soil. Different bucket positions may also wear at different rates on the same machine.

    Instead of relying on a universal lifespan claim, track wear condition and operating results for the actual machine, application, and tooth system.

    Why Service Life Cannot Be Predicted by Hours Alone

    Operating hours describe time, not the severity or amount of wear work performed. A machine may spend part of a shift idling, repositioning, or performing lower-load tasks.

    Production volume, material properties, digging technique, impact, abrasion, and tooth position can change the relationship between hours and remaining wear material.

    Use hours as one maintenance record, but combine them with inspections, measurements, production data, and the reason each tooth was removed.

    Working Material Has a Major Effect

    Hard, abrasive material can remove tooth material rapidly, while high-impact conditions can create different risks such as cracking, chipping, or breakage.

    Record whether the machine works in:

    • Loose or previously disturbed soil
    • Sand, gravel, or abrasive aggregate
    • Compacted ground or clay
    • Rock, quarry, or mining material
    • Demolition or mixed-impact conditions

    Material descriptions should be based on site conditions rather than broad labels alone.

    Tooth Profile Changes the Wear Balance

    Longer or narrower profiles may support penetration but distribute material differently from heavier or more abrasion-oriented profiles.

    A profile with more wear material may last longer in one application while increasing resistance or performing poorly in another. A sharp profile may improve penetration but may not be the best choice for every impact condition.

    Compare tooth options using the bucket tooth profile guide and actual site requirements.

    Material and Manufacturing Quality Matter

    Steel selection, heat treatment, casting or forging controls, dimensional consistency, and defect control can all influence performance.

    Manufacturing method alone does not establish service life. A product should be assessed from its complete specification, production controls, suitability for the application, and documented results.

    When comparing options, distinguish verified product information from broad claims such as “longest lasting” or “heavy duty.”

    Adapter and Lock Condition Affect Tooth Life

    A correct tooth relies on the adapter and locking components for support and retention. Wear or mismatch elsewhere in the system can change contact, permit movement, or create abnormal loading.

    Check the adapter nose, tooth seating position, and lock engagement whenever teeth are replaced. A new tooth cannot restore worn supporting geometry.

    If a new tooth feels unexpectedly loose, review how adapter wear affects tooth fitment.

    Operation and Bucket Position Change Wear

    Digging angle, crowd force, side loading, impact practices, bucket alignment, and material flow can influence tooth wear.

    Corner teeth and center teeth may experience different loading and material contact. Compare positions rather than assuming the full set will reach the same replacement point.

    Repeatedly abnormal wear in one location should prompt investigation of the complete bucket, adapter, tooth, and operating conditions.

    Replace the Tooth Before Adapter Protection Is Lost

    Do not keep a tooth in service solely to maximize the number of recorded hours. Continuing past its applicable wear limit can expose or damage the adapter and increase total replacement cost.

    Replacement may be required when the working profile is no longer effective, wear approaches protected areas, or cracking, breakage, deformation, or excessive movement is found.

    Use the manufacturer’s service limits and review the signs that bucket teeth are worn out.

    Build a Site-Specific Service-Life Record

    Record the tooth reference, profile, machine, bucket position, installation date, removal date, hours, production, working material, and reason for removal.

    Photographs and wear measurements at regular intervals can help show how quickly the profile changes and whether different positions need separate inspection schedules.

    Use several comparable cycles before drawing conclusions. One tooth can fail early or remain in service longer for reasons that do not represent normal performance.

    Replacement Timing

    Do Not Chase Maximum Hours at Any Cost

    The longest possible tooth life is not always the lowest-cost result. Delayed replacement can reduce penetration, increase fuel or cycle demands, expose the adapter, and create more expensive system damage.

    Use the applicable wear limit and total operating outcome. Keep the attachment out of service if the tooth is cracked, broken, visibly insecure, or cannot be retained as specified.

    Compare Tooth Life for Your Application

    Share the tooth system, machine, working material, wear pattern, operating record, and purchasing requirements so replacement options can be compared more clearly.

    Get Sourcing Help
    • Tooth system, profile, and bucket position
    • Working material and operating conditions
    • Hours, production, and removal history
    • Wear photos and replacement requirements
  • Forged Bucket Teeth vs Cast Bucket Teeth

    Manufacturing Process Comparison

    Forged and cast bucket teeth are produced by different manufacturing processes, but the process name alone does not determine which product will perform better in a specific application.

    Steel composition, heat treatment, dimensional control, internal soundness, tooth profile, adapter fitment, quality control, and operating conditions can all affect service performance.

    Buyers should compare complete product specifications and verified results rather than treating “forged” or “cast” as a universal quality grade.

    How Forged Bucket Teeth Are Made

    Forging shapes heated steel through controlled compressive force. Depending on the process and part design, this can refine material flow and produce a dense component structure.

    Forging quality still depends on billet material, temperature control, die design, forming sequence, heat treatment, machining, and inspection.

    A forged label alone does not confirm hardness, toughness, dimensional accuracy, or suitability for the application.

    How Cast Bucket Teeth Are Made

    Casting pours molten steel into a mold that forms the tooth geometry. The process can produce complex shapes and distribute wear material according to the intended profile.

    Cast-product performance depends on alloy selection, melting control, mold design, pouring practice, solidification, heat treatment, defect control, and dimensional inspection.

    A well-controlled casting can perform reliably, while poor production control can create inconsistency or internal defects.

    Strength and Toughness

    Bucket teeth need enough strength and toughness for the expected loads. Excessive brittleness can contribute to cracking or breakage, while insufficient hardness can accelerate wear.

    Neither manufacturing process guarantees the correct balance. Material chemistry and heat treatment strongly influence the final mechanical properties.

    Compare documented hardness ranges, impact requirements, quality controls, and field performance where available.

    Wear Resistance

    Wear resistance depends on more than the forged or cast label. Tooth profile, usable wear material, hardness distribution, alloy, heat treatment, abrasion, impact, and working technique all affect service life.

    A heavier profile may provide more wear volume but may also increase resistance. A narrow profile may penetrate better while losing material faster in severe abrasion.

    Compare teeth under similar operating conditions and record the reason each part was removed.

    Dimensional Consistency and Fitment

    A bucket tooth must fit the adapter and locking system correctly regardless of how it was manufactured. Pocket geometry, seating depth, contact areas, and lock alignment require consistent control.

    Dimensional variation can cause poor seating, abnormal movement, difficult installation, or concentrated loading.

    Confirm compatibility using the adapter and tooth compatibility guide.

    Quality-Control Evidence

    Useful supplier evidence may include material specifications, heat-treatment records, hardness testing, dimensional inspection, traceability, defect-control procedures, and application references.

    Ask how production batches are checked and how nonconforming parts are controlled. General statements such as “premium,” “heavy duty,” or “OEM quality” are not substitutes for relevant evidence.

    Documentation should match the specific product reference being considered.

    Application Matters More Than a General Claim

    A tooth that performs well in abrasive material may not be the best option for repeated high-impact work. The correct choice depends on ground conditions, digging resistance, machine use, bucket position, and the tooth profile.

    Compare the complete product against the actual application instead of assuming one manufacturing process is superior in every environment.

    Use the bucket tooth selection guide to define the operating requirements first.

    Compare Total Service Value

    Unit price and process labels do not show total operating value. Include service life, production, fuel demand, replacement labor, downtime, lock use, adapter protection, availability, and failure risk.

    Record the machine, tooth position, installation and removal dates, hours, production, working material, wear pattern, and reason for removal.

    Use several comparable service cycles before drawing a purchasing conclusion.

    Buying Decision

    Do Not Select by Manufacturing Method Alone

    Forging and casting are manufacturing routes, not complete performance specifications. Either process can produce a suitable or unsuitable tooth depending on material, design, heat treatment, dimensional control, defect control, and application match.

    Ask for product-specific evidence and compare verified field results under similar working conditions. Keep damaged, cracked, or insecure teeth out of service regardless of manufacturing method.

    Compare Bucket Teeth for Your Application

    Share the machine, tooth system, working material, product references, required quantity, and purchasing requirements for a clearer product comparison.

    Prepare Your Sourcing Request
    • Machine, bucket, and tooth system
    • Working material and operating conditions
    • Material, heat treatment, and inspection data
    • Quantity, destination, and service requirements
  • Types of Bucket Teeth Explained

    Tooth Profiles & Applications

    Bucket teeth are available in several different profiles, and each type is designed for a specific balance of penetration, durability, and wear life. Choosing the right type matters because tooth shape directly affects digging efficiency, replacement frequency, and suitability for the job — helping buyers choose the right bucket teeth.

    Many buyers use the term “bucket teeth” as if all teeth perform the same way, but that is rarely true in practice. A tooth designed for general construction may not perform well in quarry conditions, while a heavy-duty rock tooth may be unnecessary for lighter work.

    This guide explains the common types of bucket teeth, how they differ, and where each type is typically used.

    Why Bucket Tooth Type Matters

    Bucket tooth type affects how the bucket enters material, how the load is distributed, and how quickly the tooth wears during operation. The right profile can improve penetration and reduce wear-related downtime, while the wrong profile may reduce efficiency or increase replacement cost.

    In practical terms, tooth type selection is a balance between digging performance and wear resistance. The ideal choice depends on application, material conditions, and how the machine is being used on site.

    General Purpose Bucket Teeth

    General purpose bucket teeth are designed for mixed working conditions and routine digging applications. They are commonly used in general construction, earthmoving, and light-to-medium duty jobs where no extreme wear pattern dominates.

    Their advantage is versatility. They offer a practical balance between penetration, durability, and service life, which makes them one of the most common options for everyday use.

    Penetration Bucket Teeth

    Penetration teeth are built with a narrower and more aggressive profile to help the bucket enter compacted material more efficiently. They are often used in trenching, dense soil, and situations where digging resistance is relatively high.

    Their main advantage is improved penetration performance. However, because they typically have less material in the wearing area, they may wear faster than heavier profiles in abrasive conditions.

    Heavy Duty Bucket Teeth

    Heavy duty bucket teeth are designed with more material in the wear zone to improve durability and service life. They are suitable for tougher applications where impact and abrasion are more significant than in routine construction work.

    Compared with lighter profiles, heavy duty teeth can offer longer wear life in suitable applications. The trade-off is that they may not penetrate as aggressively as penetration-focused designs.

    Rock and Abrasion-Resistant Profiles

    Rock teeth and other abrasion-resistant profiles are intended for demanding environments such as quarry and mining operations. Depending on the design, they may prioritize penetration into rock, additional wear material, or a balance of both.

    These labels are not interchangeable specifications. Compare the actual profile and the manufacturer’s application guidance to determine whether the tooth suits the abrasion and impact conditions of the job.

    How to Compare Different Tooth Types

    The main comparison points between bucket tooth types are penetration ability, wear resistance, durability, and application suitability. A narrower profile may dig more efficiently, but a heavier profile may deliver better service life in abrasive material.

    Buyers should compare tooth types based on real working conditions rather than appearance alone. The best choice is not always the sharpest or the heaviest option, but the one that matches the application most effectively.

    How to Choose the Right Type for the Job

    For general construction and mixed material handling, general purpose teeth are often the most practical starting point. For compacted soil or trenching work, penetration teeth may improve digging efficiency. For quarry, mining, and high-abrasion environments, compare profiles designed for the specific combination of wear and penetration demands.

    The most effective approach is to consider application, wear level, and replacement priorities together. Buyers should also confirm compatibility with the adapter system before choosing a specific tooth type.

    Final Thoughts

    Understanding bucket tooth types helps buyers make more practical replacement decisions and avoid using one profile for every job. Different tooth shapes serve different performance priorities. For machine-focused selection advice, see Best Bucket Teeth for Excavators.

    When in doubt, start with the application, then compare penetration needs, expected wear conditions, and compatibility requirements. This provides a more reliable basis for choosing the right bucket tooth type.

    Before your next step

    Match the Profile and Confirm the Fit

    A suitable tooth profile still needs to match the installed adapter and locking system. Confirm the system series, dimensions, and lock arrangement before ordering.

    Review the compatibility guide or use the photo checklist if identification is uncertain. Explore more topics in Bucket Teeth Guides.

    Need Help Comparing Tooth Profiles?

    Share your current tooth system, machine details, working conditions, and replacement priorities to prepare a clearer sourcing request.

    Get Sourcing Help
    • Machine and installed tooth system
    • Material, abrasion, and impact conditions
    • Current wear pattern and part photos
    • Quantity and replacement priorities
  • Best Bucket Teeth for Excavators

    Excavator Bucket Tooth Selection

    The best bucket teeth for an excavator depend on the machine, bucket, installed tooth system, working material, digging resistance, abrasion, impact, and the operating result the buyer needs.

    No single tooth profile is best for every excavator application. A penetration tooth may perform well in compact ground, while a heavier profile may provide better wear life in abrasive material. Rock and quarry work introduce different impact and strength requirements.

    Start with the actual application, then confirm compatibility with the complete tooth, adapter, pin, and retainer system.

    Start with the Excavator and Bucket

    Record the excavator brand, model, operating weight, bucket type, bucket width, number of teeth, and the work the attachment performs.

    Machine model alone may not identify the installed tooth system. The same excavator can use different buckets, adapters, and tooth families.

    Use actual part references and component photos instead of assuming the original system is still installed.

    Describe the Working Material

    Material hardness, abrasiveness, compaction, moisture, particle size, and impact severity influence tooth selection and wear rate.

    Typical conditions include:

    • Loose or previously disturbed soil
    • Compacted ground or dense clay
    • Sand, gravel, and abrasive aggregate
    • Rock, quarry, or mining material
    • Mixed or demolition conditions

    Select for the dominant operating condition rather than a broad material label.

    General-Purpose Teeth

    General-purpose profiles balance penetration, strength, and usable wear material. They can be suitable for mixed construction work where conditions are not dominated by severe abrasion or repeated high impact.

    Their balanced shape can simplify inventory when one excavator performs several ordinary digging and loading tasks.

    They are not automatically the best option when compact material, rock, or heavy abrasion creates a more specific requirement.

    Penetration Teeth

    Penetration-oriented teeth use a narrower or more aggressive profile to enter compacted soil, clay, or dense material with less resistance.

    Improved penetration can support cycle performance and reduce the force needed to start a cut. The tradeoff may be less wear material or reduced suitability for severe impact and abrasion.

    Evaluate penetration performance together with wear life rather than treating either measure alone as decisive.

    Rock and Heavy-Duty Teeth

    Rock and heavy-duty profiles are designed to balance strength, impact demands, penetration, and usable wear material in more severe conditions.

    A thicker tooth is not automatically better. Excess material can increase resistance, and an unsuitable shape may reduce productivity even if the tooth lasts longer.

    For a focused comparison, review bucket teeth for rock versus general excavation.

    Confirm Adapter Compatibility

    The tooth pocket must match the adapter nose, seating surfaces, locking position, and system dimensions. Similar external shape does not prove compatibility.

    Check tooth and adapter references, internal geometry, seating depth, pin direction, retainer style, and available measurements.

    Use the adapter and tooth compatibility guide before purchasing a replacement.

    Inspect the Existing System

    Adapter wear, damaged contact surfaces, incorrect locks, or previous fitment problems can shorten the life of a new tooth.

    Inspect the adapter nose, seating areas, lock opening, pin or retainer, welds, and wear pattern whenever a tooth is removed.

    A new tooth cannot restore worn supporting geometry. Replace the affected component according to the applicable service limits.

    Compare Total Operating Value

    The lowest-priced tooth is not necessarily the most economical. Compare service life, penetration, production, fuel demand, replacement labor, downtime, lock use, and adapter protection.

    Record the tooth reference, machine, bucket position, installation and removal dates, hours, production, material, wear pattern, and reason for removal.

    Use several comparable service cycles before standardizing a tooth option across a fleet.

    Selection Reminder

    The Best Tooth Is the One Matched to the Complete Application

    A tooth should not be selected from machine model, price, profile name, or appearance alone. Confirm the bucket, adapter system, locking components, working material, performance requirement, and wear conditions together.

    Keep the attachment out of service if a tooth is cracked, broken, visibly insecure, or cannot be retained according to the tooth-system requirements.

    Choose Teeth for Your Excavator Application

    Share the machine, bucket, tooth system, working material, photos, part references, quantity, and destination for a clearer product comparison.

    Prepare Your Sourcing Request
    • Excavator and bucket information
    • Tooth, adapter, and lock references
    • Working material and operating conditions
    • Required quantity and destination
  • How to Choose Bucket Teeth

    Bucket Tooth Selection Guide

    Choosing the right bucket teeth affects penetration, digging efficiency, wear life, fuel demand, downtime, and the total cost of replacement. The best option depends on the application, working material, machine, bucket, adapter system, and the performance required from the tooth profile.

    Bucket teeth are not equally suitable for every job. A profile designed for penetration may wear too quickly in severe abrasion, while a heavy abrasion-oriented tooth may create unnecessary resistance in compact material.

    Use the complete operating situation—not price or appearance alone—to compare tooth profiles and confirm compatibility before ordering.

    Start with the Actual Application

    The working application should be the first selection criterion. General construction, trenching, quarry work, mining, loading, and demolition expose a tooth to different combinations of penetration resistance, impact, and abrasion.

    Record the work the machine performs most often rather than selecting a tooth for an occasional task. If the application changes regularly, identify the conditions that create the highest wear or productivity cost.

    A useful application description includes material type, compaction, moisture, impact severity, digging technique, and expected production.

    Describe the Working Material

    Broad descriptions such as soil or rock may not be specific enough. Tooth wear changes with hardness, abrasiveness, particle size, compaction, moisture, and embedded rock.

    Common conditions include:

    • Loose or previously disturbed soil
    • Compacted ground or dense clay
    • Sand, gravel, or abrasive aggregate
    • Rock, quarry, or mining material
    • Mixed or high-impact material

    Use the dominant material conditions when comparing tooth profiles.

    Compare Tooth Profiles

    General-purpose teeth balance penetration and wear material for mixed conditions. Penetration profiles use a narrower or more aggressive shape to enter compact material with less resistance.

    Heavy-duty and abrasion-oriented profiles normally carry more wear material but may require more force to penetrate. Rock profiles must balance impact strength, penetration, and resistance to material loss.

    Review the main types of bucket teeth before selecting a profile by name alone.

    Balance Penetration and Wear Life

    A tooth with more wear material does not automatically produce the best operating result. Extra material can extend wear life in abrasion but may reduce penetration or increase resistance in difficult ground.

    A sharper profile can improve penetration and cycle performance, although it may provide less usable wear volume in highly abrasive material.

    Compare total production, fuel demand, replacement frequency, downtime, and adapter protection instead of evaluating service hours alone.

    Confirm Tooth and Adapter Compatibility

    A suitable profile still has to match the existing adapter and locking system. Similar appearance, overall length, or machine brand does not prove compatibility.

    Confirm the system series, tooth pocket, adapter-nose geometry, seating depth, lock direction, pin or retainer style, and relevant dimensions.

    Use the adapter and tooth compatibility guide to check the complete system before ordering.

    Check the Machine and Bucket

    Machine model alone may not identify the installed tooth system. The same machine can use different buckets, adapters, and tooth families depending on the attachment and application.

    Record the machine brand and model, bucket type, bucket width, number of teeth, adapter style, and any available part numbers or markings.

    For excavator-specific considerations, see the bucket teeth guide for excavators.

    Inspect the Existing System

    Adapter wear, damaged seating surfaces, an incorrect lock, or previous installation problems can affect a new tooth. A replacement tooth cannot restore worn supporting geometry.

    Before ordering, inspect:

    • Adapter nose and seating surfaces
    • Tooth movement and wear pattern
    • Pin, lock, and retainer condition
    • Cracks, deformation, or damaged welds

    Unusual wear should be investigated before repeating the same purchase.

    Compare Total Value, Not Unit Price Alone

    A lower purchase price may not reduce operating cost if the tooth wears quickly, fits poorly, increases downtime, or exposes the adapter to damage.

    Compare product specification, dimensional consistency, material and heat-treatment information, supplier documentation, service performance, availability, and replacement cost.

    Use comparable operating records rather than isolated claims when deciding whether a tooth provides better value.

    Common Buying Mistake

    Do Not Choose by Appearance or Price Alone

    Two teeth can look similar while using different pocket geometry, seating depth, locking positions, or system dimensions. A low price also provides little value if the part cannot be installed correctly or wears abnormally.

    If the system is uncertain, collect clear tooth, adapter, lock, marking, and measurement photos before placing an order. Keep the attachment out of service if a tooth is cracked, broken, visibly insecure, or cannot be retained as specified.

    Prepare a Bucket Teeth Request

    Share the machine, bucket, tooth system, working material, photos, part references, quantity, and destination so suitable options can be compared more clearly.

    Prepare Your Sourcing Request
    • Machine and bucket details
    • Tooth, adapter, and lock photos
    • Part references and dimensions
    • Quantity and working conditions