Nut or carriage: Lead 2mm to 50mm

Component Specifications

Definition

A nut or carriage is a critical component in linear motion systems that interfaces with a lead screw or drive mechanism. It translates rotational movement from the screw into precise linear displacement along the screw's axis. In industrial applications, it typically incorporates anti-backlash features, load-bearing surfaces, and mounting interfaces for connecting to machine slides, tables, or other moving elements. The design ensures minimal friction, high positional accuracy, and repeatability in automated machinery.

Working Principle

The nut or carriage operates on the screw-nut principle: when the lead screw rotates, the internal threads of the nut engage with the screw's external threads, causing the nut to move linearly along the screw's length. In recirculating ball or roller designs, rolling elements (balls or rollers) circulate within the nut to reduce friction and increase efficiency. The carriage often includes preload mechanisms to eliminate backlash and maintain precision under varying loads.

Materials

Typically made from hardened steel (e.g., AISI 52100, 440C), bronze (e.g., C93200), or engineering plastics (e.g., POM, PTFE) for wear resistance and low friction. Coatings may include black oxide, zinc plating, or lubricant-impregnated treatments.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Lead	2mm to 50mm
Lubrication	Grease or oil-based
Thread Type	Acme, ball screw, or trapezoidal
Load Capacity	Up to 50 kN dynamic, 100 kN static
Precision Grade	C3 to C10 per ISO 3408
Operating Temperature	-20°C to 120°C

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

Lead screw or drive mechanism

A mechanical component that converts rotary motion into linear motion within motorized actuators.

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Engineering Analysis

Risks & Mitigation

Backlash leading to positional inaccuracy
Wear and fatigue from cyclic loading
Contamination causing jamming or increased friction
Improper lubrication resulting in overheating

FMEA Triads

Trigger: Insufficient lubrication or contamination
Failure: Increased friction, overheating, and premature wear
Mitigation: Implement regular maintenance schedules, use sealed designs, and apply appropriate lubricants as per manufacturer specifications.

Trigger: Excessive load or misalignment
Failure: Thread deformation or fracture
Mitigation: Design with safety factors, ensure proper alignment during installation, and use overload protection devices.

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Positional accuracy within ±0.01 mm per 300 mm travel, backlash less than 0.005 mm for precision grades

Test Method

Dynamic load testing per ISO 3408-5, backlash measurement using dial indicators or laser interferometry, wear testing under simulated operational conditions

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.

Compare the published product scope and source details, then include your specifications and quantity in an enquiry.

Manufacturers of Nut or carriage

Manufacturer profiles associated with Nut or carriage.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Seal Groove

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Frequently Asked Questions

What is the difference between a nut and a carriage in lead screw systems?

A nut refers specifically to the threaded component that engages with the lead screw, while a carriage is a broader assembly that includes the nut integrated into a housing with mounting features for attaching to machine parts. Carriages often provide additional stability and load distribution.

How do I select the right nut or carriage for my application?

Consider factors such as load capacity, speed, precision requirements (e.g., backlash tolerance), environmental conditions (e.g., temperature, contaminants), and compatibility with your lead screw type (e.g., ball screw vs. acme screw). Refer to manufacturer datasheets and standards like ISO 3408 for guidance.

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 or carriage