INDUSTRY COMPONENT

Carriage / Nut

A carriage or nut is a precision component in linear actuator systems that converts rotary motion into linear motion along a screw or rail.

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Component Specifications

Definition
The carriage or nut is a critical component in linear actuator modules, typically consisting of a housing that contains recirculating ball bearings or rollers. It interfaces with a lead screw or ball screw to translate rotational input into precise linear displacement. This component provides load-bearing capability, maintains alignment, and ensures smooth motion with minimal friction and backlash in automated machinery.
Working Principle
The carriage/nut operates on the screw-nut principle. When the screw rotates, the nut (which is constrained from rotating) moves linearly along the screw's axis. In ball screw systems, recirculating balls within the nut reduce friction by rolling between the screw threads and nut grooves, enabling high efficiency and precision.
Materials
Typically manufactured from hardened steel (AISI 52100, 440C), stainless steel (AISI 304, 316), aluminum alloys (6061-T6), or engineering plastics (POM, PTFE composites) for corrosion resistance, wear resistance, and load capacity.
Technical Parameters
  • Backlash 0.001-0.1 mm
  • Lubrication Grease or oil, maintenance intervals: 1000-5000 km travel
  • Lead Accuracy ±0.005 mm/300 mm to ±0.05 mm/300 mm
  • Load Capacity Dynamic: 500-5000 N, Static: 1000-10000 N
  • Precision Grade C3 to C7 (ISO 3408)
  • Operating Temperature -20°C to +80°C
Standards
ISO 3408, DIN 69051, JIS B1192

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Carriage / Nut.

linear actuator nut ball screw nut carriage assembly linear motion component precision nut recirculating ball nut industrial automation parts Carriage / Nut Carriage / Nut in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Linear Actuator Module

A precision electromechanical component that converts rotational motion into controlled linear displacement.

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Engineering Analysis

Risks & Mitigation
  • Backlash accumulation leading to positioning errors
  • Wear from contamination or inadequate lubrication
  • Overloading causing permanent deformation
  • Corrosion in harsh environments
  • Thermal expansion affecting precision
FMEA Triads
Trigger: Contamination entering the recirculating ball path
Failure: Increased friction, uneven motion, premature wear
Mitigation: Install effective seals/wipers, maintain clean environment, use protective covers
Trigger: Insufficient or improper lubrication
Failure: Metal-to-metal contact, excessive wear, overheating
Mitigation: Follow manufacturer's lubrication schedule, use recommended lubricants, monitor temperature
Trigger: Misalignment during installation
Failure: Uneven load distribution, binding, reduced lifespan
Mitigation: Use precision mounting surfaces, follow alignment procedures, verify parallelism

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Positioning repeatability: ±0.001-0.01 mm, Lead accuracy per ISO 3408 grades
Test Method
Coordinate measuring machines (CMM) for dimensional verification, laser interferometry for positioning accuracy, load testing per ISO 14728, vibration analysis for noise and smoothness

Buyer Feedback

★★★★☆ 4.7 / 5.0 (11 reviews)

"Standard OEM quality for Machinery and Equipment Manufacturing applications. The Carriage / Nut arrived with full certification."

"Great transparency on the Carriage / Nut components. Essential for our Machinery and Equipment Manufacturing supply chain."

"The Carriage / Nut we sourced perfectly fits our Machinery and Equipment Manufacturing production line requirements."

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Frequently Asked Questions

What is the difference between a carriage and a nut in linear actuators?

A carriage typically refers to the complete assembly that includes the nut, housing, and mounting features, while 'nut' specifically denotes the threaded component that engages with the screw. In practice, these terms are often used interchangeably for the moving element.

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

Consider load requirements (axial, radial, moment loads), speed, precision grade, environmental conditions (temperature, contaminants), mounting configuration, and required lifespan. Consult manufacturer catalogs and use selection software for optimal matching.

What maintenance does a carriage/nut require?

Regular lubrication according to manufacturer specifications, cleaning to prevent contamination, periodic inspection for wear or damage, and replacement of seals/wipers when degraded. Maintenance frequency depends on operating conditions and load.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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Carcass Carriage Block