MBS

Features

・New coupling that incorporates tolerance endplay function in a universal joint.
・Simple construction-composed of three elements : an outer hub, 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.

mbs 01

Configuration and materials

 

mbs zu en

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

Dimensions of key groove shape

mbs 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
17-22 6 6 2.8 6×6

 

Assembly: 

Example Application

mbs caution en

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

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

Dimensions

Item No.
D ød1 H8 ød2 H8 L B C E F M

Fastening torque

(N・m)

MBS 6
6 3 3 16.2 6.8 4 9 1.7 2 0.3
MBS 8 8 3 3 20.2 8.2 5 11 2.5 3 1
MBS 10 10 4 4 21 9.2 5.5 12 2.8 3 1
MBS 11 11 5 5 21.5 9.5 6 12.5 2.8 3 1
MBS 12 12 6 6 25.3 11 7 14 3 3 1
MBS 15 15 6   8 8 28 12 7 15.7 3.5 4 2
MBS 20
20 6   8   10  8   10 36 15 8 20.5 4 4 2
MBS 24 24 8   10   12 10   12 44 18.5 10 25 5 4 2
MBS 28 28 12   14   15 12   15 48 20.5 12.5 27.5 6 5 4
MBS 32 32 16   18   20 16  18  20*1 50 21 12.5 29 6 5 4
MBS 38

37.8

18  20  22  24*2 18  20  22  24*2 64 26.5 15 37.5 7.5 6 6

*1: Key groove machining is not possible for ø20 of d2.

*2: Key groove machining is not available for ø24.

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)

MBS 6 0.7 3,000 40 1 15 ±1.0 1.0x10-8 3
MBS 8 2.0 3,000 170 1 15 ±1.3 4.0x10-8 6
MBS 10 2.8 4,000 260 1 15 ±1.3 1.0x10-7 9
MBS 11 3.5 4,000 400 0.8 15 ±1.5 2.0x10-7 11
MBS 12 5.0 4,000 500 0.8 15 ±1.5 3.5x10-7 15
MBS 15 9.0 4,000 1,000 0.5 15 ±1.8 9.0x10-7 25
MBS 20 20 4,000 2,200 0.5 12 ±2.2 3.5x10-6 40
MBS 24 32 4,000 5,200 0.4 12 ±2.5 9.0x10-6 70
MBS 28 40 4,000 9,200 0.4 12 ±3.0 2.0x10-5 150
MBS 32 60 4,000 15,000 0.3 12 ±3.0 3.2x10-5 210
MBS 38 90 4,000 40,000 0.3 8 ±4.0 7.1x10-5 360

Note (1):Rated torque is for angular misalignment ≦ 5°. At 10°, it will be approx. 2/3 the values.

Note (2):Maximum rotating speed is for angular misalignment ≦5°. At 10°, it will be approx. 1/2 the values.

Note (3):Allowable end play is for angular misalignment ≦5°. At 10°, it will be approx. 1/2 the values.

Note (4):The MBS 20-38 has 6 balls and the direction of the set screw is the same on the left and right.