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Flexible Coupling - Jaw-Type (Short) - Clamping + Key Type

Name: MJS-CSK-RD
Brand: Nabeya Bi-tech Kaisha
Availability: OutOfStock

MJS-CSK-RD

Safety Precautions Glossary Mounting/maintenance

MJS-CS-BL/MJS-CS-EBL//MJS-CSK-WH_CFlexible Coupling - Jaw-Type (Short)

Dimension Drawing

Specs/CAD

mm inch

Part Number	Bore Diameter	AA	LL	WW	BB	CC	FF	GG	M	Wrench Torque (N･m)Wrench Torque (lbf in.)	Standard bore diameter D₁-D₂	Price (USD)	CAD Download	Add to Cart
MJS-25CSK-RD	D=10 10＜D≦12	250.984	80.315	261.024	80.315	10.039	40.157	9 9.50.354 0.374	M3 M2.5	1.5 113.27 8.85	-	69.43	CAD	Cart
MJS-30CSK-RD	10≦D≦12 12＜D≦16	301.181	9.50.374	321.26	100.394	1.50.059	4.750.187	10 110.394 0.433	M4 M3	3.5 1.530.98 13.27	-	75.16	CAD	Cart
MJS-40CSK-RD	10≦D≦20 20＜D≦25	401.575	170.669	501.969	120.472	20.079	8.50.335	14 15.750.551 0.62	M5 M4	8 3.570.8 30.98	-	81.86	CAD	Cart
MJS-55CSK-RD	10≦D≦28 28＜D≦32	552.165	180.709	542.126	140.551	20.079	90.354	20 210.787 0.827	M6 M5	13 8115.05 70.8	-	143.67	CAD	Cart
MJS-65CSK-RD	14≦D≦32 32＜D≦38	652.559	210.827	622.441	150.591	2.50.098	10.50.413	24 250.945 0.984	M8 M6	28 13247.8 115.05	-	190.86	CAD	Cart

Part Number	Max. Bore Diameter (mm)	Rated Torque^＊1 (N・m)Rated Torque^＊1 (lbf in.)	Max. Torque^＊1 (N・m)Max. Torque^＊1 (lbf in.)	Backlash Zero Allowable Transmission Torque(N・m)^＊3Backlash Zero Allowable Transmission Torque(lbf in.)^＊3	Max. Rotational (min^-1)	Moment of Inertia^＊2 (Kg・m²)Moment of Inertia^＊2 (oz. in.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.)	Sleeve Hardness	Mass^＊2 (g)Mass^＊2 (oz)
MJS-25CSK-RD	12	7.263.72	14.4127.44	0.43.54	25000	2.5×10-60.137	12018.54	0.10.004	1	0～+0.90～+0.035	A98	250.88
MJS-30CSK-RD	16	12.5110.63	25221.25	0.54.43	21000	5.4×10-60.295	13020.08	0.10.004	1	0～+ 1.00～+ 0.039	A98	381.34
MJS-40CSK-RD	25	17150.45	34300.9	1.210.62	15000	2.7×10-51.476	1200185.35	0.10.004	1	0～+1.20～+0.047	A98	963.39
MJS-55CSK-RD	32	60531	1201062	--	11000	1.0×10-45.467	2600401.6	0.10.004	1	0～+1.40～+0.055	A98	2107.41
MJS-65CSK-RD	38	1601416	3202832	--	9000	2.3×10-412.575	4900756.85	0.10.004	1	0～+1.50～+0.059	A98	33011.64

＊1：　Correction of rated torque and max. torque due to load fluctuation is not required.However, if ambient temperature exceeds 30°C, be sure to correct the rated torque and max. torque with temperature correction factor shown in the table.MJC's allowable operating temperature is -20°C to 60°C.
＊2：　These are values with max. bore diameter.
＊3：　For transmission of backlash0Zero, please use a tight fit sleeve.

Part Number	Standard bore diameter　D₁-D₂
Part Number	10	11	12	14	15	16	18	19	20	22	24	25	28	30	32	35	38
MJS-25CSK-RD	●	●	●	-	-	-	-	-	-	-	-	-	-	-	-	-	-
MJS-30CSK-RD	●	●	●	●	●	●	-	-	-	-	-	-	-	-	-	-	-
MJS-40CSK-RD	●	●	●	●	●	●	●	●	●	●	●	●	-	-	-	-	-
MJS-55CSK-RD	●	●	●	●	●	●	●	●	●	●	●	●	●	●	●	-	-
MJS-65CSK-RD	-	-	-	●	●	●	●	●	●	●	●	●	●	●	●	●	●

●All products are provided with hex socket head cap screw.
●Recommended dimensional allowances of applicable shaft diameter are h6 and h7.
●A set of hubs with clamping type for one side and clamping + key type for the other side is available upon request.
●In case of mounting on D-cut shaft, be careful about the position of the D-cut surface of the shaft.
●For the shaft insertion amount to the coupling, see Mounting/maintenance. ⇒Mounting and Maintenance

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

mm inch

unit:mm
Applicable Bore Diameter D₁D₂					keyway				Key
					b		t		Nominal Dimension b×h
					Standard Dimension	Allowance (JS9)	Standard 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
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

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)

Ambient Temperature / Temperature Correction Factor

Ambient Temperature	Temperature Correction Factor
-20℃ to 30℃	1.00
30℃ to 40℃	0.80
40℃ to 60℃	0.70

Slip torque

As in the table below, the clamping type MJS-CS has different slip torque according to the bore diameter. Take care during selection.

Unit : N・m

Part Number	Bore Diameter (mm)
Part Number	3	4	4.5	5	6	6.35	7	8	9.525	10	11	12	14	15	16	18	19	20	22	24	25	28	30	32	35	38
MJS-20CS	0.8	1.7	2.2	2.6	3.5	3.8	4.4	5.3
MJS-25CS		1.9	2.6	3.4	4.9	5.4	6.4	7.9	10	11	8.6	8.9
MJS-30CS					7	7.6	8.7	10	13	14	16	17	14	16	17
MJS-40CS								28	35	37
MJS-55CS										40	46	53	66	72	79	92	98	100	110	130	130		140
MJS-65CS													110	120	130	150	160	170	190	210	220	260	280	300	300	300

These are test values based on the conditions of shaft dimensional allowance: h7, hardness: 34-40 HRC, and screw tightening torque of the values described in MJS-CS dimension tables. They are not guaranteed values.
Slip torque changes with usage conditions. Carry out tests under conditions similar to actual conditions in advance.

Structure

Clamping Type MJS-CS-BL MJS-CS-EBL MJS-CS-EGR MJS-CS-ERD MJS-CS-EWH MJS-CS-GR MJS-CS-RD MJS-CS-WH

MJS-＊＊CS-＊＊Tight Fit
MJS-＊＊CS-E＊＊Easy Fit

MJS-CS-BL/MJS-CS-EBL//MJS-CSK-WH_CFlexible Coupling - Jaw-Type (Short)

Clamping + Key Type MJS-CSK-BL MJS-CSK-EBL MJS-CSK-EGR MJS-CSK-ERD MJS-CSK-EWH MJS-CSK-GR MJS-CSK-RD MJS-CSK-WH

MJS-＊＊CSK-＊＊Tight Fit
MJS-＊＊CSK-E＊＊Easy Fit

MJS-CS-BL/MJS-CS-EBL//MJS-CSK-WH_CFlexible Coupling - Jaw-Type (Short)

Sleeve

MJS-CS-BL/MJS-CS-EBL//MJS-CSK-WH_CFlexible Coupling - Jaw-Type (Short)

Material/Finish

	MJS-CSK-RD
Hub	A2017 Anodized＊1
Sleeve	Polyurethane
Hex Socket Head Cap Screw	SCM435 Ferrosoferric Oxide Film (Black)

＊1：　With regard to bore and keyway surface treatment, process needs may result in a mixture of parts with and without surface treatment. This will not lead to any issues in terms of coupling performance.

Characteristics

Applicable motors

	Tight Fit	Easy Fit
Servomotor	○	●
Stepping Motor	○	○
General-Purpose Motor	◎	◎

◎: Excellent ○: Very good　●: Available

Property

	Tight Fit	Easy Fit
Zero Backlash	○	-
High Torque	◎	◎
Allowable Misalignment	○	○
Vibration Absorption	◎	◎
Electrical Insulation	◎	◎
Assembling	○	◎
Allowable Operating Temperature	-20℃ to 60℃	-20℃ to 60℃

◎: Excellent ○: Very good

This is a jaw type flexible coupling.
It is a short type and more compact than MJC.
Tight Fit enables transmission with zero backlash at low torque.
Easy fit allows assembling and separation of hubs.
Excellent flexibility allows eccentricity, angular misalignment and twisting vibration to be accepted.
It has electrical insulation. Resistance value: Not less than 2 MΩ

Sleeve Type

MJS-CS-BL/MJS-CS-EBL//MJS-CSK-WH_CFlexible Coupling - Jaw-Type (Short)

Selection

Selection based on shaft diameter and rated torque

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

MJS-CS-BL/MJS-CS-EBL//MJS-CSK-WH_CFlexible Coupling - Jaw-Type (Short)

Selection Example

In case of selected parameters of shaft diameter of φ15 and load torque of 6 N•m, the selected size for MJS-＊＊CS-RD, MJS-＊＊CS-ERD is MJS-30CS-RD, MJS-30CS-ERD.

Details of Shaft Hole

MJS-CSK-RDFlexible Coupling - Jaw-Type (Short) - Clamping + Key Type

Standard Bore Diameter D	Keyway				Key
	b		t		Nominal Dimension b x h
	Standard Dimension	Allowance (JS9)	Standard Dimension	Allowance	Nominal Dimension b x h
10・11・12	4	±0.0150	1.8	0 to +0.1	4×4
14・15・16	5	±0.0150	2.3	0 to +0.1	5×5
18・19・20・22	6	±0.0150	2.8	0 to +0.1	6×6
24・25・28・30	8	±0.0180	3.3	0 to +0.2	8×7
32・35・38	10	±0.0180	3.3	0 to +0.2	10×8

Eccentric Reaction Force

MJS-CS-BL/MJS-CS-EBL//MJS-CSK-WH_TTechnical Information

Sleeve Details

MJS-CSK-RDFlexible Coupling - Jaw-Type (Short) - Clamping + Key Type

Easy Fit

This unit allows you to easily assemble and partition the hub and sleeve.
This allows you to reduce the time of assembling the unit and maintenance.
It is possible to mount a hub on the shaft in advance and easily assemble the unit even in a location where the coupling is less-visible.

Tight Fit

The hub and sleeve are press-fit and can be used under zero backlash＊1.Since the sleeve's vibration absorption can raise the gain of a servomotor, this unit can achieve high responsive operation exceeding the Disk coupling.

＊1：　For the torque used under zero backlash, please refer to Performance table.

MJS-CS/MJS-CSK_CFlexible Coupling - Jaw-Type (Short)

Change in static torsional stiffness due to temperature

MJS-CS-BL/MJS-CS-EBL//MJS-CSK-WH_TTechnical Information

This is a value under the condition where the static torsional stiffness at 20°C is 100%.
The change of torsional stiffness within the range of allowable operating temperature is as shown in the graph.
Before using the unit, be aware of the deterioration of responsiveness.

Related Services

Product List

MJS-25CSK-RD

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