NBS

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Features

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

 nbs 01

Configuration and materials

 

nbs zu en

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

Dimensions of key groove shape

nbs 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
22-30 8 8 ±0.0180 3.3 +0.2
0		 8×7
30-38 10 10 3.3 10×8
38-44 12 12 ±0.0215 3.3 12×8
44-50 14 14 3.8 14×9
50 16 16 4.3 16×10

Dimensions

Item
No.		D 

Standard hole diameters ød1,ød2 H8

(left/right can be freely conbined)

LBCEF

M 

Fastening
torque
(N⋅m)
NBS30
 30   10   12   15                                           39 17.5 10 25 4.5 5 4
NBS35
 35       12   15                                           50 21 10 29.5 5 5 4
NBS40 40               18   20                                   70 30 16 40 8 6 7
NBS50 50               18   20   22   24       28                   86 36.5 18 50.5 9 8 15
NBS60 60                   20           25       30   35           100 41 23 57 11 10 30
NBS75 74                               25       30   35   40       100 41 23 57 11 10 30
NBS85 84                                       30   35   40   45   100 41 23 57 11 10 30

Specifications

Item No.

Roted torque

(N⋅m)

Maximum rotating speed

(rpm)

Torsional rigidity
(N⋅m/rad)

Back lash

(deg. MAX)

Allowable

end play

(mm)

Allowable angular misalignment

(°)

Moment of inertia
(kg⋅m2)

Mass

(g)

NBS30 20 3,000 6,000 0.3 ±4.0 10 6.8x10-6 60
NBS35 30 3,000 8,000 0.3 ±5.0 10 1.3x10-5 85
NBS40 50 3,000 10,000 0.2 ±5.0 10 3.5x10-5 170
NBS50 80 3,000 11,000 0.2 ±7.5 10 1.1x10-4 360
NBS60 130 2,000 12,000 0.2 ±7.5 7.5 2.8x10-4 555
NBS75 190 1,500 13,000 0.2 ±7.5 7.5 6.6x10-4 850
NBS85 250 1,500 15,000 0.2 ±7.5 7.5 1.2x10-3 1,150

*1. Rated torque is for angular misalignment≦5°. At 10°, it will be approx.1/2 the value.
*2. Maximum rotating speed is for angular misalignment≦5°. At 10°, it will be approx.1/2 the value.
*3. Allowable end play is for angular misalignment≦5°. At 10°, it will be approx.1/2 the value.

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