NBK logo

  • Couplings
  • Rigid Couplings

Rigid Couplings - Set Screw Type

MRGS

Safety PrecautionsGlossaryMounting/maintenance

RoHS Compliant

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

Dimension Drawing

MRGSRigid Couplings - Set Screw Type寸法図

*1: In a case where the bore diameter is φ 4 or less, the set screw is used in only one place.

Specs/CAD

Part Number AWFM Screw Tightening
Torque (N・m)		Standard Bore Diameter (Dimensional Allowance H8)
D1-D2		 Price
(USD)		 CAD
Download		 Add to Cart Additional Modification
MRGS-16 16 24 6 M3 0.7 30.00 CAD Cart       
MRGS-20 20 30 7 M3 0.7 35.11 CAD Cart       
MRGS-25 25 36 9 M4 1.7 41.93 CAD Cart       
MRGS-32 32 41 10 M4 1.7 47.35 CAD Cart       
MRGS-40 40 44 10.5 M5 4 91.20 CAD Cart       
MRGS-50 50 53 12 M6 7 189.81 CAD Cart       
MRGS-65 65 65 16 M8 15 348.32 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
MRGS-16 8 0.3 39000 1.2×10-6 28
MRGS-20 10 0.5 31000 3.5×10-6 54
MRGS-25 12 1 25000 1.0×10-5 100
MRGS-32 16 2 19000 3.1×10-5 190
MRGS-40 20 3 15000 8.1×10-5 326
MRGS-50 25 4.5 12000 2.4×10-4 658
MRGS-65 32 7 9000 8.4×10-4 1290

＊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 (Dimensional Allowance H8)
D1･D2
MRGS-16 5-5 5-6 6-6    
MRGS-20 6-6 6-8 6-10 8-8 8-10
10-10        
MRGS-25 8-8 8-10 8-12 10-10 10-12
12-12        
MRGS-32 12-12 12-15 12-16 15-15 15-16
16-16        
MRGS-40 16-16 16-18 16-19 16-20 18-18
18-19 18-20 19-19 19-20 20-20
MRGS-50 19-19 19-20 19-25 20-20 20-25
25-25        
MRGS-65 28-28 28-30 28-32 30-30 30-32
32-32        

● 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 take advantage of our modification services.
● For the shaft insertion amount to the coupling, see Mounting/maintenance. ⇒Mounting and Maintenance

Part Number
Amount
Price（＄）

Check other products Cart

　　　　　　

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

MRGS
Main Body SUS303
Hex Socket Set Screw SUSXM7
Hex Socket Head Cap Screw SUSXM7

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

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

◎: Excellent ●: 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

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.

Related Services

Product List

Click here to see Rigid Couplings

MRG-C

Part Name

Rigid Couplings - Clamping Type

Part Number

MRG-C

Feature

Standard

MRG-W

Part Name

Rigid Couplings - Split Type

Part Number

MRG-W

Feature

Standard

MRGS-C

Part Name

Rigid Couplings - Clamping Type

Part Number

MRGS-C

Feature

Standard

MRGS-W

Part Name

Rigid Couplings - Split Type

Part Number

MRGS-W

Feature

Standard

Click here to see Couplings

Oldham Couplings

Oldham Couplings

High Gain Couplings

High Gain Couplings

Bellows Couplings

Bellows Couplings

Jaw Couplings

Jaw Couplings