MSX

Flexible Couplings - Slit Type - Set Screw Type

RoHS Compliant

Zero Backlash
High torsional rigidity
Single-Piece Construction

MSX/MSX-C_CFlexible Couplings - Slit Type

Dimension Drawing
Specs/CAD
Structure
Material/Finish
Characteristics

Dimension Drawing

Specs/CAD

mm inch

Part Number	AA	LL	WW	FF	M	Screw Tightening Torque (N・m)Screw Tightening Torque (lbf in.)	Price (USD)	CAD	Add to Cart
MSX-16	160.63	60.236	17.40.685	30.118	M3	0.76.19	40.02	CAD	Cart
MSX-19	190.748	6.80.268	200.787	3.40.134	M3	0.76.19	45.65	CAD	Cart
MSX-24	240.945	8.50.335	250.984	4.250.167	M4	1.715.04	52.76	CAD	Cart
MSX-29	291.142	10.20.402	301.181	5.10.201	M4	1.715.04	59.85	CAD	Cart
MSX-34	341.339	120.472	351.378	60.236	M5	435.4	83.64	CAD	Cart
MSX-39	391.535	13.50.531	401.575	6.750.266	M5	435.4	88.94	CAD	Cart
MSX-44	441.732	15.50.61	451.772	7.750.305	M6	761.95	103.49	CAD	Cart

Part Number	Max. Bore Diameter (mm)	Rated Torque^＊1 (N・m)Rated Torque^＊1 (lbf in.)	Max. Rotational Frequency (min^-1)	Moment of Inertia (kg・m²)^＊2Moment of Inertia (oz. in.²)^＊2	Static Torsional Stiffness (N･m/rad)Static Torsional Stiffness (lbf in./deg)	Max. Lateral Misalignment (mm)Max. Lateral Misalignment (in.)	Max. Angular Misalignment (°)	Max. Axial Misalignment (mm)Max. Axial Misalignment (in.)	Mass (g) ^＊2Mass (oz) ^＊2
MSX-16	8	0.54.43	39000	2.8×10-70.015	20030.89	0.050.002	0.5	±0.1±0.004	70.25
MSX-19	10	18.85	33000	6.2×10-70.034	27041.7	0.050.002	0.5	±0.1±0.004	100.35
MSX-24	12	1.513.27	26000	2.0×10-60.109	790122.02	0.050.002	0.5	±0.1±0.004	220.78
MSX-29	14	217.7	21000	5.2×10-60.284	1400216.24	0.050.002	0.5	±0.1±0.004	401.41
MSX-34	18	326.55	18000	1.1×10-50.601	2200339.81	0.050.002	0.5	±0.1±0.004	642.26
MSX-39	20	653.1	16000	2.9×10-51.586	4100633.29	0.050.002	0.5	±0.1±0.004	903.17
MSX-44	22	979.65	14000	5.5×10-53.007	5100787.75	0.050.002	0.5	±0.1±0.004	1334.69

＊1：　Correction of rated torque due to load fluctuation is not required. For more detailed information, please refer to Selection Guidelines.
＊2：　These are values with max. bore diameter.

Part Number	Standard Bore Diameter (Dimensional Allowance H8) D₁･D₂
MSX-16	5-5	5-6	6-6
MSX-19	5-5	5-6	5-7	5-8	6-6
	6-6.35	6-7	6-8	6.35-6.35	6.35-8
	8-8	8-10	10-10
MSX-24	6-6	6-8	6-10	6.35-6.35	6.35-8
	6.35-10	7-8	8-8	8-9.525	8-10
	9.525-10	10-10	10-11	10-12	11-12
	12-12
MSX-29	8-8	8-10	8-11	8-12	10-10
	10-11	10-12	10-14	11-12	11-14
	12-12	12-14
MSX-34	10-14	11-14	12-12	12-14	12-16
	14-14	14-15	14-16	15-15	15-16
	16-16
MSX-39	10-14	12-12	12-14	12-15	12-16
	12-19	14-14	14-15	15-15	15-16
	16-16
MSX-44	12-12	12-14	12-19	14-14	14-15
	14-16	15-15	15-16	15-19	15-20
	20-20

●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.

Part Number	Standard Bore Diameter (Dimensional Allowance H8) D₁･D₂
MSX-16-5-5	5-5
	5-6
	6-6
MSX-16-5-6	5-5
	5-6
	6-6
MSX-16-6-6	5-5
	5-6
	6-6
MSX-19-5-5	5-5
	5-6
	5-7
	5-8
	6-6
	6-6.35
	6-7
	6-8
	6.35-6.35
	6.35-8
	8-8
	8-10
	10-10
MSX-19-5-6	5-5
	5-6
	5-7
	5-8
	6-6
	6-6.35
	6-7
	6-8
	6.35-6.35
	6.35-8
	8-8
	8-10
	10-10
MSX-19-5-7	5-5
	5-6
	5-7
	5-8
	6-6
	6-6.35
	6-7
	6-8
	6.35-6.35
	6.35-8
	8-8
	8-10
	10-10
MSX-19-5-8	5-5
	5-6
	5-7
	5-8
	6-6
	6-6.35
	6-7
	6-8
	6.35-6.35
	6.35-8
	8-8
	8-10
	10-10
MSX-19-6-6	5-5
	5-6
	5-7
	5-8
	6-6
	6-6.35
	6-7
	6-8
	6.35-6.35
	6.35-8
	8-8
	8-10
	10-10
MSX-19-6-6.35	5-5
	5-6
	5-7
	5-8
	6-6
	6-6.35
	6-7
	6-8
	6.35-6.35
	6.35-8
	8-8
	8-10
	10-10
MSX-19-6-7	5-5
	5-6
	5-7
	5-8
	6-6
	6-6.35
	6-7
	6-8
	6.35-6.35
	6.35-8
	8-8
	8-10
	10-10
MSX-19-6-8	5-5
	5-6
	5-7
	5-8
	6-6
	6-6.35
	6-7
	6-8
	6.35-6.35
	6.35-8
	8-8
	8-10
	10-10
MSX-19-6.35-6.35	5-5
	5-6
	5-7
	5-8
	6-6
	6-6.35
	6-7
	6-8
	6.35-6.35
	6.35-8
	8-8
	8-10
	10-10
MSX-19-6.35-8	5-5
	5-6
	5-7
	5-8
	6-6
	6-6.35
	6-7
	6-8
	6.35-6.35
	6.35-8
	8-8
	8-10
	10-10
MSX-19-8-8	5-5
	5-6
	5-7
	5-8
	6-6
	6-6.35
	6-7
	6-8
	6.35-6.35
	6.35-8
	8-8
	8-10
	10-10
MSX-19-8-10	5-5
	5-6
	5-7
	5-8
	6-6
	6-6.35
	6-7
	6-8
	6.35-6.35
	6.35-8
	8-8
	8-10
	10-10
MSX-19-10-10	5-5
	5-6
	5-7
	5-8
	6-6
	6-6.35
	6-7
	6-8
	6.35-6.35
	6.35-8
	8-8
	8-10
	10-10
MSX-24-6-6	6-6
	6-8
	6-10
	6.35-6.35
	6.35-8
	6.35-10
	7-8
	8-8
	8-9.525
	8-10
	9.525-10
	10-10
	10-11
	10-12
	11-12
	12-12
MSX-24-6-8	6-6
	6-8
	6-10
	6.35-6.35
	6.35-8
	6.35-10
	7-8
	8-8
	8-9.525
	8-10
	9.525-10
	10-10
	10-11
	10-12
	11-12
	12-12
MSX-24-6-10	6-6
	6-8
	6-10
	6.35-6.35
	6.35-8
	6.35-10
	7-8
	8-8
	8-9.525
	8-10
	9.525-10
	10-10
	10-11
	10-12
	11-12
	12-12
MSX-24-6.35-6.35	6-6
	6-8
	6-10
	6.35-6.35
	6.35-8
	6.35-10
	7-8
	8-8
	8-9.525
	8-10
	9.525-10
	10-10
	10-11
	10-12
	11-12
	12-12
MSX-24-6.35-8	6-6
	6-8
	6-10
	6.35-6.35
	6.35-8
	6.35-10
	7-8
	8-8
	8-9.525
	8-10
	9.525-10
	10-10
	10-11
	10-12
	11-12
	12-12
MSX-24-6.35-10	6-6
	6-8
	6-10
	6.35-6.35
	6.35-8
	6.35-10
	7-8
	8-8
	8-9.525
	8-10
	9.525-10
	10-10
	10-11
	10-12
	11-12
	12-12
MSX-24-7-8	6-6
	6-8
	6-10
	6.35-6.35
	6.35-8
	6.35-10
	7-8
	8-8
	8-9.525
	8-10
	9.525-10
	10-10
	10-11
	10-12
	11-12
	12-12
MSX-24-8-8	6-6
	6-8
	6-10
	6.35-6.35
	6.35-8
	6.35-10
	7-8
	8-8
	8-9.525
	8-10
	9.525-10
	10-10
	10-11
	10-12
	11-12
	12-12
MSX-24-8-9.525	6-6
	6-8
	6-10
	6.35-6.35
	6.35-8
	6.35-10
	7-8
	8-8
	8-9.525
	8-10
	9.525-10
	10-10
	10-11
	10-12
	11-12
	12-12
MSX-24-8-10	6-6
	6-8
	6-10
	6.35-6.35
	6.35-8
	6.35-10
	7-8
	8-8
	8-9.525
	8-10
	9.525-10
	10-10
	10-11
	10-12
	11-12
	12-12
MSX-24-9.525-10	6-6
	6-8
	6-10
	6.35-6.35
	6.35-8
	6.35-10
	7-8
	8-8
	8-9.525
	8-10
	9.525-10
	10-10
	10-11
	10-12
	11-12
	12-12
MSX-24-10-10	6-6
	6-8
	6-10
	6.35-6.35
	6.35-8
	6.35-10
	7-8
	8-8
	8-9.525
	8-10
	9.525-10
	10-10
	10-11
	10-12
	11-12
	12-12
MSX-24-10-11	6-6
	6-8
	6-10
	6.35-6.35
	6.35-8
	6.35-10
	7-8
	8-8
	8-9.525
	8-10
	9.525-10
	10-10
	10-11
	10-12
	11-12
	12-12
MSX-24-10-12	6-6
	6-8
	6-10
	6.35-6.35
	6.35-8
	6.35-10
	7-8
	8-8
	8-9.525
	8-10
	9.525-10
	10-10
	10-11
	10-12
	11-12
	12-12
MSX-24-11-12	6-6
	6-8
	6-10
	6.35-6.35
	6.35-8
	6.35-10
	7-8
	8-8
	8-9.525
	8-10
	9.525-10
	10-10
	10-11
	10-12
	11-12
	12-12
MSX-24-12-12	6-6
	6-8
	6-10
	6.35-6.35
	6.35-8
	6.35-10
	7-8
	8-8
	8-9.525
	8-10
	9.525-10
	10-10
	10-11
	10-12
	11-12
	12-12
MSX-29-8-8	8-8
	8-10
	8-11
	8-12
	10-10
	10-11
	10-12
	10-14
	11-12
	11-14
	12-12
	12-14
MSX-29-8-10	8-8
	8-10
	8-11
	8-12
	10-10
	10-11
	10-12
	10-14
	11-12
	11-14
	12-12
	12-14
MSX-29-8-11	8-8
	8-10
	8-11
	8-12
	10-10
	10-11
	10-12
	10-14
	11-12
	11-14
	12-12
	12-14
MSX-29-8-12	8-8
	8-10
	8-11
	8-12
	10-10
	10-11
	10-12
	10-14
	11-12
	11-14
	12-12
	12-14
MSX-29-10-10	8-8
	8-10
	8-11
	8-12
	10-10
	10-11
	10-12
	10-14
	11-12
	11-14
	12-12
	12-14
MSX-29-10-11	8-8
	8-10
	8-11
	8-12
	10-10
	10-11
	10-12
	10-14
	11-12
	11-14
	12-12
	12-14
MSX-29-10-12	8-8
	8-10
	8-11
	8-12
	10-10
	10-11
	10-12
	10-14
	11-12
	11-14
	12-12
	12-14
MSX-29-10-14	8-8
	8-10
	8-11
	8-12
	10-10
	10-11
	10-12
	10-14
	11-12
	11-14
	12-12
	12-14
MSX-29-11-12	8-8
	8-10
	8-11
	8-12
	10-10
	10-11
	10-12
	10-14
	11-12
	11-14
	12-12
	12-14
MSX-29-11-14	8-8
	8-10
	8-11
	8-12
	10-10
	10-11
	10-12
	10-14
	11-12
	11-14
	12-12
	12-14
MSX-29-12-12	8-8
	8-10
	8-11
	8-12
	10-10
	10-11
	10-12
	10-14
	11-12
	11-14
	12-12
	12-14
MSX-29-12-14	8-8
	8-10
	8-11
	8-12
	10-10
	10-11
	10-12
	10-14
	11-12
	11-14
	12-12
	12-14
MSX-34-10-14	10-14
	11-14
	12-12
	12-14
	12-16
	14-14
	14-15
	14-16
	15-15
	15-16
	16-16
MSX-34-11-14	10-14
	11-14
	12-12
	12-14
	12-16
	14-14
	14-15
	14-16
	15-15
	15-16
	16-16
MSX-34-12-12	10-14
	11-14
	12-12
	12-14
	12-16
	14-14
	14-15
	14-16
	15-15
	15-16
	16-16
MSX-34-12-14	10-14
	11-14
	12-12
	12-14
	12-16
	14-14
	14-15
	14-16
	15-15
	15-16
	16-16
MSX-34-12-16	10-14
	11-14
	12-12
	12-14
	12-16
	14-14
	14-15
	14-16
	15-15
	15-16
	16-16
MSX-34-14-14	10-14
	11-14
	12-12
	12-14
	12-16
	14-14
	14-15
	14-16
	15-15
	15-16
	16-16
MSX-34-14-15	10-14
	11-14
	12-12
	12-14
	12-16
	14-14
	14-15
	14-16
	15-15
	15-16
	16-16
MSX-34-14-16	10-14
	11-14
	12-12
	12-14
	12-16
	14-14
	14-15
	14-16
	15-15
	15-16
	16-16
MSX-34-15-15	10-14
	11-14
	12-12
	12-14
	12-16
	14-14
	14-15
	14-16
	15-15
	15-16
	16-16
MSX-34-15-16	10-14
	11-14
	12-12
	12-14
	12-16
	14-14
	14-15
	14-16
	15-15
	15-16
	16-16
MSX-34-16-16	10-14
	11-14
	12-12
	12-14
	12-16
	14-14
	14-15
	14-16
	15-15
	15-16
	16-16
MSX-39-10-14	10-14
	12-12
	12-14
	12-15
	12-16
	12-19
	14-14
	14-15
	15-15
	15-16
	16-16
MSX-39-12-12	10-14
	12-12
	12-14
	12-15
	12-16
	12-19
	14-14
	14-15
	15-15
	15-16
	16-16
MSX-39-12-14	10-14
	12-12
	12-14
	12-15
	12-16
	12-19
	14-14
	14-15
	15-15
	15-16
	16-16
MSX-39-12-15	10-14
	12-12
	12-14
	12-15
	12-16
	12-19
	14-14
	14-15
	15-15
	15-16
	16-16
MSX-39-12-16	10-14
	12-12
	12-14
	12-15
	12-16
	12-19
	14-14
	14-15
	15-15
	15-16
	16-16
MSX-39-12-19	10-14
	12-12
	12-14
	12-15
	12-16
	12-19
	14-14
	14-15
	15-15
	15-16
	16-16
MSX-39-14-14	10-14
	12-12
	12-14
	12-15
	12-16
	12-19
	14-14
	14-15
	15-15
	15-16
	16-16
MSX-39-14-15	10-14
	12-12
	12-14
	12-15
	12-16
	12-19
	14-14
	14-15
	15-15
	15-16
	16-16
MSX-39-15-15	10-14
	12-12
	12-14
	12-15
	12-16
	12-19
	14-14
	14-15
	15-15
	15-16
	16-16
MSX-39-15-16	10-14
	12-12
	12-14
	12-15
	12-16
	12-19
	14-14
	14-15
	15-15
	15-16
	16-16
MSX-39-16-16	10-14
	12-12
	12-14
	12-15
	12-16
	12-19
	14-14
	14-15
	15-15
	15-16
	16-16
MSX-44-12-12	12-12
	12-14
	12-19
	14-14
	14-15
	14-16
	15-15
	15-16
	15-19
	15-20
	20-20
MSX-44-12-14	12-12
	12-14
	12-19
	14-14
	14-15
	14-16
	15-15
	15-16
	15-19
	15-20
	20-20
MSX-44-12-19	12-12
	12-14
	12-19
	14-14
	14-15
	14-16
	15-15
	15-16
	15-19
	15-20
	20-20
MSX-44-14-14	12-12
	12-14
	12-19
	14-14
	14-15
	14-16
	15-15
	15-16
	15-19
	15-20
	20-20
MSX-44-14-15	12-12
	12-14
	12-19
	14-14
	14-15
	14-16
	15-15
	15-16
	15-19
	15-20
	20-20
MSX-44-14-16	12-12
	12-14
	12-19
	14-14
	14-15
	14-16
	15-15
	15-16
	15-19
	15-20
	20-20
MSX-44-15-15	12-12
	12-14
	12-19
	14-14
	14-15
	14-16
	15-15
	15-16
	15-19
	15-20
	20-20
MSX-44-15-16	12-12
	12-14
	12-19
	14-14
	14-15
	14-16
	15-15
	15-16
	15-19
	15-20
	20-20
MSX-44-15-19	12-12
	12-14
	12-19
	14-14
	14-15
	14-16
	15-15
	15-16
	15-19
	15-20
	20-20
MSX-44-15-20	12-12
	12-14
	12-19
	14-14
	14-15
	14-16
	15-15
	15-16
	15-19
	15-20
	20-20
MSX-44-20-20	12-12
	12-14
	12-19
	14-14
	14-15
	14-16
	15-15
	15-16
	15-19
	15-20
	20-20

Part Number
Amount
Price（＄）

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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
mm inch mm in. keyway	mm inch mm in. keyway			Cart

unit:mm
Shaft Hole D₁D₂					keyway				Key
					b		t		Nominal Dimension b×h
					Basic Dimension	Allowance (JS9)	Basic Dimension	Allowance	Nominal Dimension b×h
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

Refer to the "Couplicon Bore Diameter Additional Modification Service" for more information.
BT： Additional modification of bore
KT： Metric Keyway Modification (JIS Standard)
KA： Inch Keyway Modification (AGMA Standard)

Structure

Set Screw Type

MSX MSX

MSX/MSX-C_CFlexible Couplings - Slit Type

Clamping Type

MSX-C MSX-C

MSX/MSX-C_CFlexible Couplings - Slit Type

Material/Finish

	MSX
Main Body	A7075 Anodized
Hex Socket Set Screw	SCM435 Ferrosoferric Oxide Film (Black)
Hex Socket Head Cap Screw	SCM435 Ferrosoferric Oxide Film (Black)

Characteristics

Recommended Applicable Motor

	MSX
Servomotor	◎
Stepping Motor	◎
General-purpose Motor	●

◎: Excellent ○: Very good ●: Available

Property

	MSX
Zero Backlash	◎
High Torque	○
High Torsional Stiffness	◎

◎: Excellent ○: Very good

This is a metal spring coupling with single-piece construction. A slit is inserted into a cylindrical material.
It has an extremely high torsional stiffness and low moment of inertia.
Extra super duralumin (A7075) featuring the highest strength among aluminum alloy is adopted.
A plate spring formed by a slit allows eccentricity, angular misalignment, and end-play to be accepted.

Application

Actuator / High precision XY stage / Index table

Selection

Selection Based on Shaft Diameter and Rated Torque

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

MSX/MSX-C_CFlexible Couplings - Slit Type

Selection Example

In case of selected parameters of shaft diameter of φ 15 and load torque of 2 N•m, the selected size is MSX-34or MSX-34C.

Selection Based on the Rated Output of the Servomotor

Rated Output (W)	Servomotor Specifications＊1			Selection Size
	Diameter of Motor Shaft (mm)	Rated Torque (N・m)	Instantaneous Max. Torque (N・m)	MSX	MSX-C
	Diameter of Motor Shaft (mm)	Rated Torque (N・m)	Instantaneous Max. Torque (N・m)	Set Screw Type	Clamping Type
10	5 - 6	0.032	0.096	MSX-16	MSX-16C
20	5 - 6	0.064	0.19	MSX-16	MSX-16C
30	5 - 7	0.096	0.29	MSX-19	MSX-19C
50	6 - 8	0.16	0.48	MSX-19	MSX-19C
100	8	0.32	0.95	MSX-19	MSX-19C
200	9 - 14	0.64	1.9	MSX-29	MSX-34C
400	14	1.3	3.8	MSX-39	MSX-39C
750	16 - 19	2.4	7.2	MSX-44	MSX-44C

＊1：　Motor specifications are based on general values. For details, see the motor manufacturer's catalogs. This is the size for cases where devices such as reduction gears are not used.

Eccentric Reaction Force

MSX/MSX-C_TTechnical Information

Thrust reaction force

MSX/MSX-C_TTechnical Information

Change in static torsional stiffness due to temperature

This is a value under the condition where the static torsional stiffness at 20°C is 100%.
The change of MSX in torsional stiffness due to temperature is small and the change in responsiveness is extremely small. If the unit is used under higher temperature, be careful about misalignment due to elongation or deflection of the shaft associated with thermal expansion.

MSX/MSX-C_TTechnical Information

Static torsional stiffness comparison (slit-type)

MSX have high static torsional stiffness and responsiveness. Optimal for high-speed and precision positioning for servomotors, etc.

MSX/MSX-C_TTechnical Information

Related Products

The slit-type coupling MSXP in PEEK material can be used in an environment or cleanroom where heat and chemical resistance are required, such as FPD and semiconductor equipment.

MSX/MSX-C_CFlexible Couplings - Slit Type

Related Services

Coupling Stainless Steel Screw Alteration Service

Customer Service

Usage Method
Technical Question
Customization Products

NBK America LLC

1-484-685-7500
1-484-685-7600

8:00 to 17:00 on weekdays, Eastern Standard Time

MSX

Dimension Drawing

Specs/CAD

Product add to the cart

Product could not add to cart

Additional Modification Service

Structure

Set Screw Type

Clamping Type

Material/Finish

Characteristics

Application

Selection

Selection Based on Shaft Diameter and Rated Torque

Selection Example

Selection Based on the Rated Output of the Servomotor

Eccentric Reaction Force

Thrust reaction force

Change in static torsional stiffness due to temperature

Static torsional stiffness comparison (slit-type)

Related Products

Related Services

Product List

MSX-16

MSX-19

MSX-24

MSX-29

MSX-34

MSX-39

MSX-44

Customer Service

Couplings

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