• Couplings
  • Jaw Type

MJB-55-BL-19-22

Flexible Couplings - Jaw Type (Bushing)

  • High Torque
  • Vibration absorption characteristics
  • Electrical Insulation

Dimension Drawing

MJB-BLFlexible Couplings - Jaw Type (Bushing)寸法図

Specs/CAD

Part Number ALWBCM Number of Bolts M' Screw Tightening
Torque (N・m)
Price
(USD)
CAD Add to Cart
MJB-55-BL-19-22 55 30 78 14 2 M5 4 M5 8.5 196.65 CAD Cart

Part Number Slip TorqueMax. Bore Diameter
(mm)
Rated
Torque*1
(N・m)
Max. Torque
(N・m)*1
Max. Rotational Frequency
(min-1)
Moment of
Inertia
(kg・m2)*2
Static
Torsional
Stiffness
(N・m/rad)
Max. Lateral Misalignment
(mm)
Max. Angular
Misalignment
(°)
Max. Axial
Misalignment
(mm)
Sleeve Hardness Mass
(g) *2
MJB-55-BL-19-22 - 28 17 34 17000 3.7×10-4 1400 0.2 1 0~+1.4 A80 800

*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 following table.

The allowable operating temperature of MJB is -20°C to 60℃.

※ The shaft's slip torque may be smaller than the coupling's rated torque depending on the shaft bore. MJB-BLMJB-GRMJB-RDMJB-WHMJB-EBLMJB-EGRMJB-ERD

*2: These are values with max. bore diameter.

Structure

Bushing Type

MJB MJB-BL MJB-GR MJB-RD MJB-WH MJB-EBL MJB-EGR MJB-ERD MJB-EWH

MJB-BL/MJB-GR/MJB-RD/MJB-WH/MJB-EBL/MJB-EGR/MJB-ERD/MJB-EWH_CFlexible Couplings - Jaw Type (Bushing)

Sleeve

MJB-BL/MJB-GR/MJB-RD/MJB-WH/MJB-EBL/MJB-EGR/MJB-ERD/MJB-EWH_CFlexible Couplings - Jaw Type (Bushing)

MJB-BL/MJB-GR/MJB-RD/MJB-WH/MJB-EBL/MJB-EGR/MJB-ERD/MJB-EWH_CFlexible Couplings - Jaw Type (Bushing)


Material/Finish

MJB
Hub S45C
Ferrosoferric Oxide Film (Black)
Outer Ring S45C
Ferrosoferric Oxide Film (Black)
Sleeve Polyurethane
Hex Socket Head Cap Screw SCM435
Ferrosoferric Oxide Film (Black)

Characteristics

  • Recommended Applicable Motor
Tight Fit Easy Fit
Servomotor
Stepping Motor
General-purpose Motor

◎: Excellent ○: Very good ●: Available

  • Property
Tight Fit Easy Fit
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.
  • Excellent for high torque transmission and ideal for machine tool spindles.
  • Excellent flexibility. Excellent flexibility allows eccentricity, angular misalignment and twisting vibration to be accepted.
  • It has electrical insulation. Resistance value: Not less than 2 MΩ
  • There are four types of sleeve hardness. Please select desirable units according to usage conditions including torque and misalignment.
  • Since the sleeve's vibration absorption of Tight Fit can raise the gain of a servomotor, this unit can achieve high responsive operation exceeding the Disk coupling.
  • Easy fit allows you to assemble and partition the hub and sleeve smoothly.
    This allows you to reduce the time of assembling the unit and maintenance.
  • Sleeve Type

MJB-BL/MJB-GR/MJB-RD/MJB-WH/MJB-EBL/MJB-EGR/MJB-ERD/MJB-EWH_CFlexible Couplings - Jaw Type (Bushing)


Application

Machine tool / Spindle

Selection

Selection Based on Shaft Diameter and Rated Torque

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

MJB-BL/MJB-GR/MJB-RD/MJB-WH/MJB-EBL/MJB-EGR/MJB-ERD/MJB-EWH_CFlexible Couplings - Jaw Type (Bushing)

MJB-BL/MJB-GR/MJB-RD/MJB-WH/MJB-EBL/MJB-EGR/MJB-ERD/MJB-EWH_CFlexible Couplings - Jaw Type (Bushing)

MJB-BL/MJB-GR/MJB-RD/MJB-WH/MJB-EBL/MJB-EGR/MJB-ERD/MJB-EWH_CFlexible Couplings - Jaw Type (Bushing)

MJB-BL/MJB-GR/MJB-RD/MJB-WH/MJB-EBL/MJB-EGR/MJB-ERD/MJB-EWH_CFlexible Couplings - Jaw Type (Bushing)

Selection Example

In case of selected parameters of shaft diameter of φ 18 and load torque of 16 N•m, the selection size forMJB-**-BLMJB-**-EBLis MJB-55-BLMJB-55-EBL

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

Sleeve Details

MJB-BLFlexible Couplings - Jaw Type (Bushing)


Slip Torque

As in the table below, the bushing type MJB has different slip torque according to the bore diameter. Take care during selection.

Unit : N・m

Part Number Bore Diameter (mm)
10 11 12 14 15 16 18 19 20 22 24 25 28 30 32 35 38 40 42 45 48 50
MJB-55 32 54 75 110 130
MJB-65 160 170 180 200 210 220 240 260 270 300 320 340 370
MJB-80 280 330 380 410 480 500 500 500 500 500 500 500
MJB-95 500 500 500 500 500 500 500 500 500 500 500

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 MJB dimension tables. They are not guaranteed values.
Slip torque changes with usage conditions. Carry out tests under conditions similar to actual conditions in advance.


Change in static torsional stiffness due to temperature

MJB-BL/MJB-GR/MJB-RD/MJB-WH/MJB-EBL/MJB-EGR/MJB-ERD/MJB-EWH_TTechnical Information

MJB-BL/MJB-GR/MJB-RD/MJB-WH/MJB-EBL/MJB-EGR/MJB-ERD/MJB-EWH_TTechnical Information

MJB-BL/MJB-GR/MJB-RD/MJB-WH/MJB-EBL/MJB-EGR/MJB-ERD/MJB-EWH_TTechnical Information

This is a value under the condition where the static torsional stiffness at 20°C is 100%.
Changes in the static torsion spring constant within the operating temperature are shown in the graph.
Before using the unit, be aware of the deterioration of responsiveness.

MJB-BL/MJB-GR/MJB-RD/MJB-WH/MJB-EBL/MJB-EGR/MJB-ERD/MJB-EWH_TTechnical Information


Eccentric Reaction Force

MJB-BL/MJB-GR/MJB-RD/MJB-WH/MJB-EBL/MJB-EGR/MJB-ERD/MJB-EWH_TTechnical Information

MJB-BL/MJB-GR/MJB-RD/MJB-WH/MJB-EBL/MJB-EGR/MJB-ERD/MJB-EWH_TTechnical Information

MJB-BL/MJB-GR/MJB-RD/MJB-WH/MJB-EBL/MJB-EGR/MJB-ERD/MJB-EWH_TTechnical Information

MJB-BL/MJB-GR/MJB-RD/MJB-WH/MJB-EBL/MJB-EGR/MJB-ERD/MJB-EWH_TTechnical Information


Related Products

MJ-BL-SLV

MJB-BLFlexible Couplings - Jaw Type (Bushing)


Customer Service

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