SPLIT TAPER HUBS
SMART TOOTH ® SPROCKETS
Tsubaki offers a complete line of Split Taper style weld-on hubs for insertion and welding to produce “B:” style sprockets, sheaves and other applications without hub protrusion. To provide greater strength for this type of shaft locking mechanism and reduce heat distortion caused by welding, these hubs are dimensionally the same as our sprocket items. Special dimension hubs are available on a made-to-order basis. All Tsubaki hubs are made from steel bar stock (not powdered or sintered metal). The Split Taper style weld-on hubs listed below include appropriate tapered bores and mounting holes.
All dimensions in inches unless otherwise stated.
Dimensions
Tapped Holes
Weight (Lbs.)
Hub
Bushing
OD 2.00 2.50 3.00 3.00 3.88 4.50 4.50 4.50 5.75 5.75 6.75 6.75 8.50 8.50 8.50
A
B
C
K
V
W X
a(0)
d
No.
Size 1/4 20 1/4 20 5/16 18 5/16 18 5/16 18 5/16 18 3/8 16 3/8 16 3/8 16 3/8 16 1/2 13 1/2 13 5/8 11 5/8 11 5/8 11 3/4 10
G1W H1W P1W P2W B1W B2W Q1W Q2W R1W R2W S1W S2W U0W U1W U2W W1W
G H
0.174 0.174 0.292 1.100 0.292 0.709 0.709 1.606 0.709 1.606 0.946 2.963 2.000 2.963 6.016 2.963
1.168 1.621 1.938 1.938 2.623 2.623 2.875 2.875 4.000 4.000 4.625 4.625 6.000 6.000 6.000 8.500
1.875 2.375 2.875 2.875 3.750 4.375 4.375 4.375 5.625 5.625 6.500 6.500 8.250 8.250 8.250
1.563 2.000 2.438 2.438 3.125 3.125 3.375 3.375 4.625 4.625 5.375 5.375 7.000 7.000 7.000
0.625 0.875 1.313 2.313 1.313 1.750 1.750 2.750 2.000 4.000 3.313 5.688 3.750 5.625 8.625 6.375
0.625 0.875 0.625 0.625 0.813 0.813 0.875 0.875 1.125 1.125 1.625 1.625 2.000 1.750 1.750 1.750
2 2 3 3 3 3 3 3 3 3 3 3 3 3 3 4
0.4 0.6 1.4 2.5 2.3 4.7 4.4 6.9 7.3
P1 P2
1.094 1.094 1.438 1.438 1.563 1.563 2.188 2.188 2.563 2.563 3.250 3.250 3.250 4.563
0.375 0.375 0.500 0.500 0.500 0.500 0.750 0.750 0.750 0.750 1.250 1.250 1.250 1.250
60 60 60 60 60 60 60 60 60 60 60 60 60
B B
Q1 Q2 R1 R2 S1 S2 U0 U1 U2 W1
15 17 30 32 45 69
Tsubaki Smart Tooth ® offers users visual indication that a sprocket is still within allowable wear tolerance. The patented wear indicator pins on one or more teeth around the sprocket along with highly-visible blue painted finish, allow the operator to get a clear look at the wear of the sprocket without taking costly downtime to shut down the system. Tsubaki wear indicator technology makes sense in applications wear down time is critical. Sprockets are available with Smart Tooth ® technology on a made to order basis.
12.50
12.250
10.000
22.50
130
3/4" Taper per Foot on Diameter
3/4" Taper per Foot on Diameter
3/4" Taper per Foot on Diameter
Bolt Size
X
X
φ (Bolt Circle)
X
φ (Bolt Circle)
A
A
A
a
K
K
B
C
B
OD
OD
C
C
B
OD
New Smart Tooth ® Sprocket
Worn sprocket with Smart Tooth ®
• Availability
• Value
Bolt Size
Bolt Size
d
d
d
φ (Bolt Circle)
• ANSI Sizes 80-240 pitch sprockets
• Extended chain life through predictable maintenance
• Hardened teeth
• Reduction in overall ownership cost
For Bushings P, B, Q, R, S, and U
For Bushings G and H
For Bushing W
• Bored to size and bushed sprockets
• Life cycle predictability.
3/4" Taper per Foot on Diameter
3/4" Taper per Foot on Diameter Bolt Size
X 3/4" Taper per Foot on Diameter
X 3/4" Taper per Foot on Diameter
X 3/4" Taper per Foot on Diameter
Bolt Size X
X
X
φ (Bolt Circle)
φ (Bolt Circle)
A
A
A
A
A
A
a
a
K
K
K
K
B
C
B
B
C
B
OD
C
C
B
OD
C
OD
C
B
OD
Bronze wear indicator pins
Triangles below the pins
Bolt Size
Bolt Size
Bolt Size
d
d
d
d
d
d
φ (Bolt Circle)
φ (Bolt Circle)
For Bushings P, B, Q, R, S, and U
d H
For Bushings P, B, Q, R, S, and U
For Bushings G and H
For Bushing W
For Bushing W
219
220
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