End Machining: Diameter Tolerance ±0.005 mm, Hardness 45-60 HRC

Component Specifications

Definition

End machining refers to the final precision machining operations performed on lead screw components after primary manufacturing processes. This critical finishing stage ensures the screw meets exact dimensional tolerances, surface roughness specifications, and geometric requirements for proper thread engagement, load distribution, and motion transmission in mechanical systems. The process typically includes turning, grinding, threading, and surface treatment operations that determine the component's final functional characteristics.

Working Principle

End machining removes minimal material from the lead screw's critical surfaces using precision cutting tools or abrasives to achieve specified dimensions, thread profiles, and surface finishes. The process follows geometric tolerancing principles to ensure proper fit and function within mechanical assemblies, with operations controlled by CNC programming or manual precision machining techniques.

Materials

Typically applied to hardened steel alloys (AISI 4140, 4340), stainless steels (304, 316), or alloy steels with surface hardness of 45-60 HRC. Material selection depends on application requirements for strength, wear resistance, and corrosion resistance.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Hardness	45-60 HRC
Surface Roughness	Ra 0.4-1.6 μm
Diameter Tolerance	±0.005 mm
Thread Profile Angle	30° ± 0.5°
Thread Pitch Accuracy	±0.01 mm
Straightness Tolerance	0.01 mm/m

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 2901, ISO 965, DIN 103, DIN 202

Parent Products

This component is used in the following industrial products

Lead Screw

A threaded rod that converts rotational motion into linear motion within a linear actuator assembly.

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Lead Screw / Rack

A mechanical component that converts rotational motion into linear motion for precise depth positioning.

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Engineering Analysis

Risks & Mitigation

Dimensional inaccuracy causing binding or excessive backlash
Surface defects leading to premature wear
Thread profile errors affecting load distribution
Residual stresses causing deformation over time

FMEA Triads

Trigger: Tool wear or improper tool geometry
Failure: Inaccurate thread profile leading to uneven load distribution
Mitigation: Implement regular tool inspection and replacement schedules, use precision ground cutting tools

Trigger: Inadequate fixturing or clamping
Failure: Vibration during machining causing surface irregularities
Mitigation: Use precision chucks with proper clamping force, implement vibration damping systems

Trigger: Improper cutting parameters
Failure: Excessive heat generation causing material distortion
Mitigation: Optimize feed rates and cutting speeds, use appropriate coolant application

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Geometric tolerancing per ISO 1101, dimensional tolerances per ISO 286

Test Method

Coordinate measuring machines (CMM) for dimensional verification, surface profilometers for roughness measurement, optical comparators for thread profile inspection

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of End Machining

Manufacturer profiles associated with End Machining.

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Frequently Asked Questions

What is the purpose of end machining for lead screws?

End machining ensures lead screws meet precise dimensional tolerances, thread accuracy, and surface finish requirements for smooth operation, proper load distribution, and extended service life in mechanical systems.

What are the key quality parameters in end machining?

Critical parameters include diameter tolerance (±0.005 mm), thread pitch accuracy (±0.01 mm), surface roughness (Ra 0.4-1.6 μm), straightness (0.01 mm/m), and thread profile accuracy (30° ± 0.5°).

Which industries commonly require precision end machining for lead screws?

Machine tools, automation equipment, medical devices, aerospace systems, automotive manufacturing, and precision instrumentation industries frequently require end-machined lead screws for motion control applications.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

End Machining