Nut (Ball or Lead): Accuracy Grade C3-C10 per ISO 3408

Component Specifications

Definition

A critical component in linear motion systems that mates with the screw shaft to translate rotational movement into precise linear displacement. Ball screw nuts contain recirculating ball bearings for low friction, while lead screw nuts use sliding contact or polymer inserts.

Working Principle

Operates through mechanical engagement with the screw's helical grooves. In ball screw nuts, balls recirculate through raceways to minimize friction. In lead screw nuts, material deformation or sliding contact provides the driving force with inherent damping.

Materials

Typically alloy steel (SCM415, SCM440), stainless steel (SUS304, SUS440C), or bronze (CAC502). Polymer inserts may use PTFE, POM, or nylon composites for lead screw applications.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Thread Type	Metric, ACME, or custom
Preload Type	Double nut, offset preload, or single nut with spacer
Accuracy Grade	C3-C10 per ISO 3408
Mounting Configuration	Flanged, cylindrical, or square
Lubrication Requirement	Grease or oil bath

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 3408, DIN 69051, JIS B1192

Parent Products

This component is used in the following industrial products

Ball Screw / Lead Screw

A precision mechanical component that converts rotational motion into linear motion with high efficiency and accuracy.

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Engineering Analysis

Risks & Mitigation

Backlash accumulation
Wear-induced play
Lubrication failure
Thermal expansion mismatch
Mounting misalignment

FMEA Triads

Trigger: Insufficient lubrication
Failure: Increased friction, overheating, and premature wear
Mitigation: Implement automated lubrication systems and regular maintenance schedules

Trigger: Contamination ingress
Failure: Abrasive wear and ball/raceway damage
Mitigation: Install protective bellows or seals with appropriate IP ratings

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.005mm positioning accuracy for precision grades

Test Method

ISO 3408-4 for accuracy testing, DIN 69051 for dimensional verification

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 Nut (Ball or Lead)

Manufacturer profiles associated with Nut (Ball or Lead).

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Shaft Bearing

Precision component supporting rotating shafts in vibration motors to reduce friction and maintain alignment.

Seal Groove

Precision-machined groove in aluminum bearing housings designed to accommodate sealing elements for fluid containment and contamination prevention.

Frequently Asked Questions

What is the difference between ball screw nuts and lead screw nuts?

Ball screw nuts use recirculating ball bearings for high efficiency and speed, while lead screw nuts rely on sliding contact or polymer inserts for self-lubrication, damping, and cost-effectiveness in lower duty applications.

How do I select the right nut preload type?

Choose double nut for adjustable preload and backlash elimination, offset preload for compact designs, or single nut with spacer for standard applications. Consider required stiffness, backlash tolerance, and assembly constraints.

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.

Nut (Ball or Lead)