Guide Rod / Linear Bearing for Material Hold-Down Systems

Product Specifications

Technical details and manufacturing context for Guide Rod / Linear Bearing

Definition

In a Material Hold-Down System, the Guide Rod / Linear Bearing assembly is a critical sub-component responsible for ensuring precise, low-friction linear motion of the hold-down mechanism. It constrains movement to a single axis, preventing lateral deflection and maintaining alignment under load during material clamping operations. The guide rod is a hardened, ground shaft that provides a rigid, straight track. The linear bearing, a housing containing recirculating ball or roller elements, rides along this rod. The bearing converts sliding friction into rolling friction, allowing the attached hold-down plate or arm to move smoothly and precisely with minimal resistance and wear. This assembly is essential for applications requiring repeatable positioning and high accuracy, such as in clamping fixtures, presses, and automated machinery. The guide rod and bearing are available in standard metric sizes, with shaft diameters ranging from 12 to 80 mm and lengths from 100 to 2000 mm, with custom lengths up to 6000 mm on request. Dynamic load ratings range from 2.5 to 120 kN, and static load ratings from 4.0 to 180 kN, based on a 100 km travel life. Shaft tolerance grades are G6 to G8, with bearing bore tolerance H6, and surface roughness is 0.2 to 0.4 µm Ra. Operating temperature is -20 to 80°C, with high-temperature versions up to 150°C. Maximum sliding speed is 2 to 5 m/s. Materials include hardened and ground bearing steel (GCr15/52100) and stainless steel (440C). Shaft and bearing material is GCr15, hardened to 58-62 HRC. Weight per meter ranges from 0.9 to 39 kg. These specifications are reference ranges; verify model-specific values with the manufacturer.

Working Principle

The guide rod provides a rigid, straight track. The linear bearing contains recirculating balls or rollers that roll along the rod, converting sliding friction into rolling friction. This reduces resistance and wear, allowing the hold-down plate to move smoothly and precisely along the rod's axis. The bearing housing maintains the rolling elements in a recirculating path, ensuring continuous motion. The system constrains movement to a single axis, preventing lateral deflection and maintaining alignment under load.

Common Materials

Hardened and ground bearing steel (e.g., GCr15/52100), Stainless steel (e.g., 440C)

Technical Parameters

Parameter	Typical range	Notes & selection driver
Shaft Diameter	12–80 mm	Standard metric sizes; custom diameters available.ISO 10285
Shaft Length	100–2000 mm	Custom lengths up to 6000 mm on request.
Dynamic Load Rating	2.5–120 kN	Based on 100 km travel life.ISO 10285
Static Load Rating	4.0–180 kN	Maximum load without permanent deformation.ISO 10285
Tolerance Grade	G6–G8	Shaft tolerance; bearing bore tolerance H6.ISO 286
Surface Roughness	0.2–0.4 µm Ra	Critical for seal life and smooth motion.ISO 1302
Operating Temperature	-20–80 °C	For standard steel; high-temp versions up to 150°C.
Maximum Sliding Speed	2–5 m/s	Depends on lubrication and load.
Shaft Material	GCr15	Equivalent to AISI 52100; hardened to 58–62 HRC.GB/T 18254
Bearing Material	GCr15	Balls and races; cage made of steel or polymer.GB/T 18254
Hardness	58–62 HRC	Shaft and bearing race hardness.ISO 6508
Weight per Meter	0.9–39 kg/m	For shaft; depends on diameter.

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

Components / BOM

Guide Rod (Shaft) Part
Provides a hardened, precision-ground, straight track for linear motion.

Material: Hardened bearing steel or stainless steel
Linear Bearing Housing Part
Outer casing that houses the rolling elements and mounts to the moving part of the hold-down system.

Material: Steel or aluminum alloy
Recirculating Ball/Roller Elements Part
Provide rolling contact between the housing and the rod, minimizing friction.

Material: Chrome steel
Seals/Wipers Part
Protect the internal bearing components from dust, chips, and contaminants.

Material: Synthetic rubber (e.g., Nitrile)

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Material Hold-Down System

View system integration details

Manufacturers of Guide Rod / Linear Bearing

Manufacturer profiles associated with Guide Rod / Linear Bearing.

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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 · Page last updated 6 September 2026

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Frequently Asked Questions

What is the typical shaft diameter range for this guide rod?

The shaft diameter ranges from 12 to 80 mm, per ISO 10285. Custom diameters may be available on request.

What materials are used for the guide rod and bearing?

The shaft is typically made of hardened and ground bearing steel (GCr15/52100) or stainless steel (440C). The bearing balls and races are also GCr15, with a steel or polymer cage.

What is the maximum sliding speed?

The maximum sliding speed is 2 to 5 m/s, depending on lubrication and load conditions.

What is the operating temperature range?

The standard operating temperature is -20 to 80°C. High-temperature versions can operate up to 150°C.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	Up to 50 MPa static, 20 MPa dynamic
other spec:	Max velocity: 2 m/s, Load capacity: 10 kN
temperature:	-40°C to +120°C

Guide Rod / Linear Bearing

Product Specifications

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards