QJU

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Features

・Zero backlash.
・Absorb vibration and sound.
・Cushions are pipe-shaped for large degree of flexibility and long life.

・Cushion material determines torsion properties.

・Aluminum die-cast hub for a small moment of inertia.

 qju 01

Configuration and materials

 

qju zumen en

qju hinban en


・Key groove shape complies with new JIS standards.

Dimensions of key groove shape

qju key en
Hole diameter
d1,d2		KbtNominal dimension of keys
bxh
Basic dimen
sion		Tole
rance		Basic dimen
sion		Tole
rance
12 4 4 ±0.0150  1.8 +0.1
0		 4x4
12-17 5 5 2.3 5x5
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 10×8
38-40 12 12 ±0.0215 12×8

Dimensions

Item
No.		D 

Standard hole diameters ød1,ød2 H8

(left/right can be freely conbined)

D1d3LL1FA

M 

Fastening
torque
(N⋅m)

MR

(for separation)

QJU45□ 45 12 14 15 18 20 45 24 48 16.5 8 14.5 5 8 M3
QJU55□ 55 15 16 18 20 24 56 27 60 21 10.5 18.5 6 15 M4
QJU70□ 70 18 20 24 28 30 35 72 35 75 26 13 24 8 32 M5

QJU95□

 95 24 28 30 35 40 97 46 100 35.5 17.5 32 10 65 M6

* Connecting shaft precision based on g6 to h7 finish.

* Shafts with diameters of φd3 or less can be inserted to within the cushion.

Specifications

Item

No.

Allowable torque

(N⋅m)

Maximum

Rotating speed

(rpm)

Torsional rigidity
(N⋅m/rad)

Allowable parallel

misalignment

(mm)

Eccentricity

reaction force

(N/mm)

Allowable angular

misalignment

(°)		Moment of inertia
(kg⋅m2)		Mass
(g)
QJU45 UB 10 4,500 280 0.3 400 2 3x10-5 130
UY 20 4,500 1,000 0.15 850 1.6
UR 32 6,000 2,700 0.12 1,400 1.3
NK 40 6,000 3,800 0.1 1,500 1
QJU55 UB 20 4,500 600 0.3 500 2 1x10-4 300
UY 40 4,500 2,100 0.15 1,100 1.6
UR 50 6,000 5,600 0.12 1,700 1.3
NK 80 6,000 8,000

0.1

 2,000 1
QJU70 UB 40 4,500 1,500 0.3 700 2 4x10-4  600 
UY 65 4,500 4,000 0.15 1,500 1.6
UR 85 6,000 8,000 0.12 1,900 1.3
NK 120 6,000 11,000 0.1 2,200 1
QJU95 UB 80 3,000 4,000 0.4 850 2 1x10-3 1,200
UY 110 3,000 11,000 0.2 1,600 1.6
UR 135 4,000  16,000 0.15 2,000 1.3
NK 180 4,000 20,000 0.15 2,400

1

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