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Rigid Couplings - Split Type

MRG-W

Safety PrecautionsGlossaryMounting/maintenance

RoHS Compliant

  • Standard
MRG/MRGS/MRG-C/MRGS-C/MRG-W/MRGS-W_CRigid Couplings

Dimension Drawing

MRG-WRigid Couplings - Split Type寸法図

Specs/CAD

Part Number AWFGM Screw Tightening
Torque (N・m)		Standard Bore Diameter
D1-D2		 Price
(USD)		 CAD
Download		 Add to Cart
MRG-16W 16 16 4 5 M2.5 1 25.78 CAD Cart
MRG-20W 20 20 5 6.5 M2.5 1 28.11 CAD Cart
MRG-25W 25 25 6 9 M3 1.5 30.61 CAD Cart
MRG-32W 32 32 8 11 M4 2.5 39.13 CAD Cart
MRG-40W 40 40 9.5 14 M5 4 118.35 CAD Cart
MRG-50W 50 50 12 18 M6 8 201.41 CAD Cart
MRG-65W 65 65 16 23 M8 16 360.13 CAD Cart

Part Number Max. Bore Diameter
(mm)		 Rated
Torque＊1
(N・m)		Max. Rotational Frequency
(min-1)		 Moment of
Inertia
(kg・m2)＊2		Mass
(g) ＊2
MRG-16W 6 1 39000 3.2×10-7 8.8
MRG-20W 8 2.5 31000 8.7×10-7 15
MRG-25W 10 4.5 25000 2.7×10-6 29
MRG-32W 14 10 19000 9.3×10-6 61
MRG-40W 18 20 15000 2.3×10-5 99
MRG-50W 24 25 12000 7.1×10-5 189
MRG-65W 30 35 9000 2.7×10-4 428

＊1：　Correction of rated torque due to load fluctuation is not required.
＊2：　These are values with max. bore diameter.

Part Number Standard Bore Diameter D1･D2
5 6 8 10 12 14 15 16 18 19 20 25 28 30
MRG-16W ● ● - - - - - - - - - - - -
MRG-20W - ● ● - - - - - - - - - - -
MRG-25W - - ● ● - - - - - - - - - -
MRG-32W - - - ● ● ● - - - - - - - -
MRG-40W - - - - - - ● ● ● - - - - -
MRG-50W - - - - - - - - - ● ● - - -
MRG-65W - - - - - - - - - - - ● ● ●

● All products are provided with hex socket set screws.
● Recommended tolerance for shaft diameters is h6 and h7.
● Bore and keyway modifications are available on request. Please contact our customer service.
● For the shaft insertion amount to the coupling, see Mounting/maintenance. ⇒Mounting and Maintenance

Part Number
Amount
Price（＄）

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Additional Modification Service

Modified Part Number

Enter the desired bore diameter and then click [Check Modified Part Number].

Standard bore diameter(D1) Standard bore diameter(D2) Modified Part Number Price Add to cart

unit:mm
Applicable Bore Diameter
D1D2		 keyway Key
b t Nominal Dimension
b×h
Standard Dimension Allowance
(JS9)		 Standard Dimension Allowance
6 7       2 ±0.0125 1.0 +0.1
0 		2×2
8 9 10     3 ±0.0125 1.4 3×3
11 12       4 ±0.0150 1.8 4×4
13 14 15 16 17 5 ±0.0150 2.3 5×5
18 19 20 22   6 ±0.0150 2.8 6×6
24 25 28 30   8 ±0.0180 3.3 +0.2
0 		8×7
32 35 36 38   10 ±0.0180 3.3 10×8
40 42 44     12 ±0.0215 3.3 12×8
45 48 50     14 ±0.0215 3.8 14×9
55 16 ±0.0215 4.3 16×10

unit:inch
Standard Inch Bore Diameter
D1D2		 Keyway
Wk T
Standard Dimension Allowance Standard Dimension Allowance
1/2 1/8 +0.002
  0		 0.560 +0.01
  0
9/16 1/8 +0.002
  0		 0.623 +0.01
  0
5/8 3/16 +0.002
  0		 0.709 +0.01
  0
11/16 3/16 +0.002
  0		 0.773 +0.01
  0
3/4 3/16 +0.002
  0		 0.837 +0.01
  0
13/16 3/16 +0.002
  0		 0.900 +0.01
  0
7/8 3/16 +0.002
  0		 0.964 +0.01
  0
15/16 1/4 +0.002
  0		 1.051 +0.01
  0
1 1/4 +0.002
  0		 1.114 +0.01
  0
1-1/8 1/4 +0.002
  0		 1.241 +0.01
  0
1-1/4 1/4 +0.002
  0		 1.367 +0.01
  0
1-3/8 5/16 +0.002
  0		 1.518 +0.01
  0
1-1/2 3/8 +0.002
  0		 1.669 +0.01
  0
1-5/8 3/8 +0.002
  0		 1.796 +0.01
  0
1-3/4 3/8 +0.002
  0		 1.922 +0.01
  0

Material/Finish

MRG-W
Main Body A2017
Anodized
Hex Socket Set Screw SCM435
Ferrosoferric Oxide Film (Black)
Hex Socket Head Cap Screw SCM435
Ferrosoferric Oxide Film (Black)

Structure

Set Screw Type

MRG Aluminum alloyMRGMRGS

MRG/MRGS/MRG-C/MRGS-C/MRG-W/MRGS-W_CRigid Couplings

MRGSMade of all stainless steelMRGMRGS

MRG/MRGS/MRG-C/MRGS-C/MRG-W/MRGS-W_CRigid Couplings

Clamping Type

MRG-C Aluminum alloyMRG-CMRGS-C

MRG/MRGS/MRG-C/MRGS-C/MRG-W/MRGS-W_CRigid Couplings

MRGS-CMade of all stainless steelMRG-CMRGS-C

MRG/MRGS/MRG-C/MRGS-C/MRG-W/MRGS-W_CRigid Couplings

Split Type

MRG-W Aluminum alloyMRG-WMRGS-W

MRG/MRGS/MRG-C/MRGS-C/MRG-W/MRGS-W_CRigid Couplings

MRGS-WMade of all stainless steelMRG-WMRGS-W

MRG/MRGS/MRG-C/MRGS-C/MRG-W/MRGS-W_CRigid Couplings


Characteristics

  • Recommended Applicable Motor
MRG MRGS
Servomotor ◎ ◎
Stepping Motor ◎ ◎
General-purpose Motor ● ●

◎: Excellent ○: Very good ●: Available

  • Property
MRG MRGS
Zero Backlash ◎ ◎
High Torque ◎ ○
High Torsional Stiffness ◎ ◎
Corrosion Resistance (All S.S.) - ◎

◎: Excellent ○: Very good

  • This is a rigid type coupling.
  • Light weight and ultra small moment of inertia. High response. High response.
  • There are two types of units made of aluminum alloy or all stainless steel.
  • There are three attachment methods: set screw type, clamping type, and split type.

Application

High precision XY stage / Machine tool / Cleaning equipment

Precautions for Use

In case of mounting on D-cut shaft, be careful about the position of the D-cut surface of the shaft. ⇒Mounting and Maintenance
There are sizes where the hex socket head bolt exceeds the outer diameter of the coupling and the rotating diameter is larger than the outer diameter. Please be careful of the interference of coupling. Rotation Diameter

Selection

Selection Based on Shaft Diameter and Rated Torque

The area bounded by the shaft diameter and rated torque indicates the selection size.

MRG/MRGS/MRG-C/MRGS-C/MRG-W/MRGS-W_CRigid Couplings

MRG/MRGS/MRG-C/MRGS-C/MRG-W/MRGS-W_CRigid Couplings

Selection Example

In case of selected parameters of shaft diameter of φ15 and load torque of 3 N・m, the selected size for MRG is MRG-32.

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