MBD

Features

・New coupling that incorporates tolerance endplay function in a universal joint.
・Simple construction-composed of three elements : two outer hubs, an inner hub(stainless steel), and multiple balls.
・No splashing even at high speed, thanks to the use of special high-viscosity grease.
・Compact, with high-strength, making it suitable for miniaturization of mechanisms.

mbd 01

Configuration and materials

 

mbd zu en

mbd hinban en・Key groove shape complies with new JIS standards.

Dimensions of key groove shape

mbd key en
Hole diameter
d1,d2
KbtNominal dimension of keys
bxh
Basic dimen
sion
Tole
rance
Basic dimen
sion
Tole
rance
10 3 3 ±0.0125 1.4 +0.1
0
3x3
10-12 4 4 ±0.0150 1.8 4x4
12-17 5 5 2.3 5×5
17-20 6 6 2.8 6×6

 

Assembly: 

Example Application

mbd caution en

・Fix the shaft-coupling component using a strong adhesive, such as "Loctite".

・Strong high-viscosity grease is applied to the ball joint.

・Since the inner hub is free in the axial direction during rotation, it has left-right movement.

Dimensions

Item
No.

Standard hole diameters ød1,ød2 H8

(left/right can be freely conbined)

LBCEF

Fastening
torque
(N⋅m)
MBD 6 6   3                                               27.5 6.8 4 9 1.7 2 0.3
MBD 8 8   3                                               33.5 8.2 5 11 2.5 3 1
MBD10 10       4                                           37 9.2 5.5 12 2.8 3 1

MBD11

11           5                                       39 9.5 6 12.5 2.8 3 1
MBD12 12               6                                   42 11 7 14 3 3 1
MBD15 15               6   8                               46 12 7 15.7 3.5 4 2
MBD20 20               6   8   10                           58.5 15 8 20.5 4 4 2
MBD24 24                   8   10   12                       64 18.5 10 25 5 4 2
MBD28 28                           12   14   15               68 20.5 12.5 27.5 6 5 3
MBD32 32                                       16   18   20   73 21 12.5 29 6 5 3

Note 1: When using eccentricity or argument at maximum, please observe L ±0.5 of expansion / contraction when assembling.

Specifications

Item No.

Rated torque

(N⋅m)

Maximum rotating speed

(rpm)

Torsional rigidity
(N⋅m/rad)

Back lash

(deg. MAX)

Allowable angular

misalignment

(°)

Allowable

end play

(mm)

Moment of inertia
(kg⋅m2)

Mass

(g)

MBD 6 0.6 2,000 25 1.2 15 ±2.0 2.0x10-8 6
MBD 8 1.7 2,000 90 1.2 15 ±2.5 7.0x10-8 12
MBD 10 2.2 3,000 150 1 15 ±2.5 1.7x10-7 18
MBD 11 3 3,000 250 1 15 ±2.5 2.5x10-7 22
MBD 12 4 3,000 300 0.8 15 ±2.5 4.0x10-7 30
MBD 15 7 3,000 600 0.8 15 ±3.0 1.0x10-6 50
MBD 20 17 3,000 1,300 0.8 12 ±3.5 4.0x10-6 80
MBD 24 26 3,000 3,000 0.5 12 ±4.0 1.0x10-5 110
MBD 28 32 3,000 5,500 0.5 12 ±4.5 2.0x10-5 210
MBD 32 46 3,000 9,000 0.5 12 ±5.0 3.5x10-5 290

Note (2):Rated torque is for angular misalignment ≦10°, it will be approx 1/2 the values.

Note (3):Maximum rotationg speed is for angular misalignment ≦10°. At 10°, it will be approx 1/2 the value.

Note (4):Allowable end play is for angular misalignment ≦10°. At 10°, it will be approx 1/2 the value.