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Linear Guide Rail And Block

Product Introduction

The RGH35CA roller guide rail and block set is square‑type roller linear guide assembly, fully HIWIN‑compatible for direct replacement. Unlike ball‑type linear guides, it adopts cylindrical rollers as rolling elements to achieve line‑contact transmission, delivering far higher rigidity and load capacity than ball guides of the same size.
Manufactured from high‑quality GCr15 bearing steel with quenched‑and‑tempered treatment, this RGH35CA guide set supports multiple precision grades (C‑P‑SP‑UP) and various preload options (Z0 / ZA / ZB). It can be matched with custom‑cut rail lengths for heavy‑duty linear motion projects. Wholesale bulk orders are available for machinery integrators and equipment manufacturers.
Ultra‑high rigidity & heavy load capacity: 45° DB contact angle design provides equal rigidity and load‑bearing performance in four directions; roller line‑contact greatly reduces elastic deformation under heavy load. Load capacity is 2‑3 times higher than equivalent ball linear guides
HIWIN interchangeable: 100% dimensionally interchangeable with original RGH35CA series, easy drop‑in replacement without mechanical modification.
Multiple precision & preload options: Available in C, P, SP, UP precision grades; Z0 light preload, ZA medium preload, ZB heavy preload to fit different working conditions.
Strong shock & vibration resistance: Stable performance under impact load, excellent precision retention for long‑time heavy‑cutting operation.
Flexible material selection: Standard GCr15 bearing steel; optional anti‑corrosive plated surface or full SUS440C stainless steel for humid & corrosive environments.
Complete sealing accessories: Standard dust‑proof seals prevent dust and debris intrusion, extend service life; convenient lubrication port for regular maintenance.
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Core Product Features

Ultra Compact & Lightweight Design

Narrow 7mm rail profile, ultra-small cross-section structure, greatly saving internal installation space of mini machines; low self-weight reduces equipment moving load, ideal for portable and mini precision devices.

4-Point Gothic Arch Contact, Equal Load in 4 Directions

Adopts 45° gothic arc raceway & 4-row recirculating ball structure, evenly bears radial, reverse radial, horizontal and overturning torque loads. Higher rigidity than 2-row miniature guides, stable motion under complex offset loads without jitter.

Built-In Ball Retainer, Interchangeable Structure

Integrated micro steel ball retainer prevents balls falling off when disassembling the block from rail, convenient for installation, maintenance and replacement. Same precision grade rails & blocks can be freely matched, no need to pair as original sets, greatly reduce spare parts inventory cost.

Ultra-Low Friction, Smooth & Low Noise Movement

Superfinishing grinding on rail raceway surface, friction coefficient ≤0.003; rolling friction instead of sliding friction, low driving force, high-speed stable operation, running noise ≤45dB, suitable for silent precision testing equipment.

Wide Application Fields

Machine‑Tool Industry：CNC machining centers, gantry milling machines, surface grinders, boring machines, heavy‑cutting machine tools.

Heavy‑Duty Automation：Gantry robot, heavy‑load handling modules, stacking equipment, large‑scale automated production lines.

Plastic & Foundry Machinery：Large injection molding machines, extrusion equipment, die‑casting machinery.

Other High‑precision Equipment：Precision inspection machines, semiconductor processing equipment, special heavy‑duty automation machinery.

3D Printing & Desktop CNC Equipment

Cartesian 3D printer X/Y/Z axis motion, mini engraving machine, laser marking small sliding platform, stable high-speed printing & engraving without layer deviation.

Medical Diagnostic Instruments

Biochemical analyzer sample rack slide, ultrasound probe moving module, micro surgical robot end effector, blood testing equipment, stainless steel version meets medical anti-rust clean standards.

Precision Measuring & Optical Instruments

Coordinate measuring machine (CMM) micro probe axis, laser scanner, microscope objective moving platform, optical lens adjustment slide, guarantee ultra-stable detection accuracy.

Semiconductor & Electronic Automation

Wafer inspection stages, IC chip packaging manipulator, SMT mini placement head slide, AOI optical detection equipment, PCB micro cutting machines, support micron-level component assembly.
RGH roller guide rail and block

Product Parameter

Model Assambly Dimention
(mm)		 Block Dimention (mm) Rail Dimention (mm) Blot Dynamic load rating Static load rating  Allowable static moment  Block weight Rail weight
H H₁ N W B B₁ C L₁ L K₁ K₂ G M*l T H₂ H₃ Wᴿ Hᴿ D h d P E mm C(kN) C₀(kN) Mᴿ(kN·m) Mₚ(kN·m) Mᵧ(kN·m) kg kg/m
RGH15CA 28 4 9.5 34 26 4 26 45 68 13.4 4.7 5.3 M4×8 6 7.6 10.1 15 16.5 7.5 5.7 4.5 30 20 M4×16 11.3 24 0.311 0.173 0.173 0.2 1.8
RGH20CA 34 5 12 44 32 6 36 57.5 86 15.8 6 5.3 M5×8 8 8.3 8.3 20 21 9.5 8.5 6 30 20 M5×20 21.3 46.7 0.647 0.46 0.46 0.4 2.76
RGH20HA 34 5 12 44 32 6 50 77.5 106 18.8 6 5.3 M5×8 8 8.3 8.3 20 21 9.5 8.5 6 30 20 M5×20 26.9 63 0.872 0.837 0.837 0.53 2.76
RGH25CA 40 5.5 12.5 48 35 6.5 35 64.5 97.9 20.75 7.25 12 M6×8 8 9.5 10.2 23 23.6 11 9 7 30 20 M6×20 27.7 57.1 0.758 0.605 0.605 0.61 3.08
RGH25HA 40 5.5 12.5 48 35 6.5 50 81 114.4 21.5 7.25 12 M6×8 8 9.5 10.2 23 23.6 11 9 7 30 20 M6×20 33.9 73.4 0.975 0.991 0.991 0.75 3.08
RGH30CA 45 6 16 60 40 10 40 71 109.8 23.5 8 12 M8×10 8 9.5 10.3 28 28 14 12 9 40 20 M8×25 39.1 82.1 1.445 1.06 1.06 0.9 4.41
RGH30HA 45 6 16 60 40 10 60 93 131.8 24.5 8 12 M8×10 8 9.5 10.3 28 28 14 12 9 40 20 M8×25 48.1 105 1.846 1.712 1.712 1.16 4.41
RGH35CA 55 6.5 18 70 50 10 50 79 124 22.5 10 12 M8×12 12 10 19.6 34 30.2 14 12 9 40 20 M8×25 57.9 105.2 2.17 1.44 1.44 1.57 6.06
RGH35HA 55 6.5 18 70 50 10 72 106.5 151.5 25.25 10 12 M8×12 12 10 19.6 34 30.2 14 12 9 40 20 M8×25 73.1 142 2.93 2.6 2.6 2.06 6.06
RGH45CA 70 8 20.5 86 60 13 60 106 153.2 31 10 12.9 M10×17 16 14 24 45 38 20 17 14 75 22 M12×35 92.6 178.8 4.52 3.05 3.05 3.18 9.97
RGH45HA 70 8 20.5 86 60 13 80 139.8 187 37.9 10 12.9 M10×17 16 14 24 45 38 20 17 14 75 22 M12×35 116 230.9 6.33 5.47 5.47 4.13 9.97
RGH55CA 80 10 23.5 100 75 12.5 75 125.5 183.7 37.75 12.5 12.9 M12×18 17.5 17.5 29 53 44 23 20 16 60 30 M14×45 130.5 252 8.01 5.4 5.4 4.89 13.98
RGH55HA 80 10 23.5 100 75 12.5 95 173.8 232 51.9 12.5 12.9 M12×18 17.5 17.5 29 53 44 23 20 16 60 30 M14×45 167.8 348 11.15 10.25 10.25 6.68 13.98
RGH65CA 90 12 31.5 126 76 25 70 160 232 60.8 15.8 12.9 M16×20 25 25 37.5 63 53 26 22 18 75 35 M16×50 213 411.6 16.2 11.59 11.59 8.89 20.22
RGH65HA 90 12 31.5 126 76 25 120 223 295 67.3 15.8 12.9 M16×20 25 25 37.5 63 53 26 22 18 75 35 M16×50 275.3 572.7 22.55 22.17 22.17 12.13 20.22
Attention：1 kgf = 9.81 N,  CsoR=1.23x C10oR

Professional Technical Support (Factory One-Stop Service) Pre-Sales Technical Consultation

Free parameter matching: Provide load, travel, speed, environment, precision requirements, our engineers calculate dynamic/static load and recommend suitable preload & precision grade
Free dimension drawing: Send 2D/3D CAD drawings of MGN7C for your mechanical design verification
Sample support: Small trial samples available for performance testing before bulk order, fast 3–5 days sample lead time

After-Sales Technical Guidance

Detailed installation manual, lubrication & maintenance guide provided with every shipment
Online video support for installation, preload adjustment and fault troubleshooting
Engineering team online support 12 hours/day for equipment motion optimization scheme
Datasheet download: Complete catalog with load curve, tolerance table, mounting dimension chart for your technical team

Strict Quality Assurance

Full Production Inspection System

1.Raw material incoming inspection: Hardness test for GCr15/stainless steel raw steel, reject unqualified blanks
2.Semi-finished grinding inspection: 100% raceway surface roughness & dimensional tolerance detection
3.Finished product full testing: Straightness, parallelism, preload uniformity, sliding smoothness test for every set of guides
4.Random load fatigue test: Sampling long-cycle reciprocating test to verify service life under rated load

Factory Warranty Policy

12-month factory warranty for all MGN7C linear guides under normal installation & operation (exclude man-made damage, overload, corrosion from chemical liquid)
Within warranty period, free replacement for quality defects such as precision deviation, abnormal block jamming
Long-term spare parts supply: We keep full stock of MGN7C blocks and rails for after-sales replacement within 24 hours delivery

Authorized Quality Certifications

ISO9001 quality management system certified; raw material SGS material test report; export product factory inspection certificate available on request.

Proven with Industry Leaders

Specification Guide

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About Our Linear guideways.

What is the difference between ball and roller linear sliders, how to choose?

Ball sliders suit light load, high speed & low noise applications like automation and 3D printers. Roller sliders feature high rigidity, heavy load capacity and impact resistance for CNC machines and woodworking equipment.

How to select preload grade Z0/Z1/Z3 for sliders?

Z0 zero preload: low resistance for simple conveyors; Z1 light preload eliminates clearance for CNC & packaging machines; Z3 heavy preload for ultra-precision 5-axis machines and inspection equipment.

What causes abnormal noise of linear guides & sliders? How to fix it?

Insufficient lubrication, dust contamination, unparallel mounting base or damaged steel balls. Install self-lubrication and double dust-proof accessories, re-calibrate mounting surface or replace defective sliders.

Which sliders fit dusty woodworking & humid food machinery?

Sliders with double dust seals and scrapers, stainless steel rails or anti-rust coating are recommended. E2 self-lubrication units prevent chips and powder entering circulation circuits.

Can linear guide rails be customized to non-standard lengths? What’s the maximum single length?

Custom cut-to-length available. Max single rail length is 6m; longer stroke adopts spliced rails with professional joint processing.

Installation difference between flange, high-profile and low-profile sliders?

Flange sliders with through holes have low mounting height and balanced load; high-profile sliders offer higher load capacity; low-profile sliders fit narrow internal equipment space.

Application for C/H/P/SP/UP accuracy grade linear guides?

C/H: packaging & general woodworking machines; P: CNC milling & standard automation; SP/UP: 5-axis machine tools, precision testers and SLA 3D

Slider jerks and moves unsmoothly, how to troubleshoot?

Check flatness of mounting base, evenly tighten bolts, clean foreign particles inside circulation paths, replenish grease and correct rail parallelism.

Can you supply integrated linear modules with matching ball screws, guides and sliders?

Yes. We provide one-stop customized linear motion modules, matched with proper ball screws and guides according to load, stroke and accuracy requirements, delivered as finished slides ready for assembly.

What is the lead time for samples and mass orders?

Standard samples: 1–3 days; non-standard modified sliders with special protection: 3–7 days; mass production orders: 7–15 days, flexible scheduling for bulk orders.