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MONORAIL MR Order Key

Order Key for Roller Profile Guideways

Rail Order Code Structure

Rail Code Format

MR S [Size]-[Type]-[Grade]-[Hole]-[Ref]-[Length]-[L5]-[L10]-[Surface]

Position Code Description Options
1 MR S Product series MONORAIL MR Rail
2 [Size] Size 25, 30, 35, 45, 55, 65, 100
3 [Type] Rail type N, ND, NU, NUD, C, CD (see table below)
4 [Grade] Accuracy class G0, G1, G2, G3
5 [Hole] Fixing hole type KC (countersunk), K (cylindrical)
6 [Ref] Reference side R1 (bottom), R2 (top)
7 [Length] Rail length In mm (max 6000mm)
8 [L5] First hole position Distance to first fixing hole (mm)
9 [L10] Last hole position Distance to last fixing hole (mm)
10 [Surface] Surface treatment — (standard), CN (hard chrome), CH (black oxide)

Rail Type Codes

Code Type Available Sizes Description
N Standard 25-100 Top mounting, countersunk screw holes
ND Standard, through-hardened 25, 35, 45 Through-hardened raceway, high load environments
NU Bottom tapped holes 25-65 Bottom mounting, threaded holes
NUD Bottom tapped holes, through-hardened 35 Bottom mounting, through-hardened raceway
C Cover strip type 25-65 Supports metal cover strip, better protection
CD Through-hardened cover strip type 25 Metal cover strip, through-hardened raceway

Rail Order Example

MR S 35-N-G1-KC-R1-1200-32-32-CN

  • MR S 35 = MONORAIL MR Rail Size 35
  • N = Standard type (top mounting)
  • G1 = Very accurate
  • KC = Countersunk fixing holes
  • R1 = Reference at bottom
  • 1200 = Rail length 1200mm
  • 32-32 = First/last hole positions 32mm each
  • CN = Hard chromium coating

Carriage Order Code Structure

Carriage Code Format

MR W [Size]-[Type]-[Preload]-[Lube]-[Factory]-[Surface]

Position Code Description Options
1 MR W Product series MONORAIL MR Carriage
2 [Size] Size 25, 30, 35, 45, 55, 65, 100
3 [Type] Carriage type A, B, C, D, E, F, G, P (see table below)
4 [Preload] Preload class V1, V2, V3, V4
5 [Lube] Lubrication hole position S10~S99 (see accessories page)
6 [Factory] Factory lubrication LN (oil), LG (thin grease), LV (full grease)
7 [Surface] Surface treatment — (standard), CN (hard chrome), CH (black oxide)

Carriage Order Example

MR W 35-A-V2-S11-LV-CN

  • MR W 35 = MONORAIL MR Carriage Size 35
  • A = Standard carriage type
  • V2 = Standard preload
  • S11 = Lubrication hole at top center
  • LV = Full grease fill as delivered
  • CN = Hard chromium coating

Carriage Type Reference

Type Name Features Available Sizes
A Standard Standard length, high load and moment capacity 25-100
B Standard long Extended design, higher moment load capacity 25-100
C High/flat Lower height while maintaining high load capacity 25-65
D High/flat long Extended high/flat design 25-65
E High/flat, side fixing Side mounting hole design 25, 35
F Flat Lowest height design 25-55
G Flat long Extended flat design 25-55
P Standard extra long Extra long design, highest moment capacity 65

Accuracy Class Details

Class Name Height Tolerance A/B2 Parallelism P1 Applications
G0 Highly accurate ± 5 µm 3 µm/100mm Optical equipment, precision measurement
G1 Very accurate ± 10 µm 5 µm/100mm CNC machine tools, semiconductor equipment
G2 Accurate ± 20 µm 7 µm/100mm General machine tools, automation equipment
G3 Standard ± 30 µm 15 µm/100mm Material handling, general industrial

Accuracy Selection Guide

  • G0 - For µm-level precision machining and measurement applications
  • G1 - Machine tool spindles, high-precision positioning stages
  • G2 - General CNC machine tools, automation equipment
  • G3 - Non-precision positioning, material handling systems

Preload Class Details

Class Preload Force Rigidity Friction Applications
V1 Light preload Low Low Low friction requirements, light uniform loads
V2 Standard preload Medium Medium General machine tool applications, balanced rigidity and friction
V3 Medium preload High High High rigidity requirements, precision machining
V4 High preload Highest Highest Maximum rigidity, impact load environments

Surface Treatment Options

Code Treatment Features Applications
— Standard (no coating) Standard steel surface, requires regular lubrication for rust prevention General indoor environments, good lubrication maintenance
CN Hard chromium Excellent corrosion resistance, high wear resistance, good emergency running properties Harsh environments, additional protection required
CH Black oxide Enhanced rust resistance, aesthetic appearance Light corrosion protection requirements

Integrated System Ordering

MONORAIL MR can be combined with measuring systems to form complete positioning solutions:

Combination Description Available Sizes
AMS 3B MONORAIL MR + Incremental measuring system 25, 35, 45, 55, 65
AMSABS 3B MONORAIL MR + Absolute measuring system 25, 35, 45, 55, 65

Ordering Notes

Important Reminders

  • Rails and carriages must be of the same size and accuracy class
  • Paired carriages should be ordered together to ensure consistency
  • Rail length must account for first/last hole positions (L5, L10)
  • MR series single-piece rails can be up to 6000mm long
  • Through-hardened rails (ND/NUD/CD) are suitable for high load or impact environments
  • Special specifications (G0 accuracy, special lengths, etc.) - please confirm lead time in advance

Complete Order Example

Machine tool X-axis assembly order:

  • Rails: MR S 45-N-G1-KC-R1-1500-40-40-CN × 2 pcs
  • Carriages: MR W 45-A-V2-S11-LV-CN × 4 pcs

Description: Two Size 45 rails (1500mm), each paired with two standard carriages, G1 accuracy with V2 preload, hard chrome protection.

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