CURVED CHAINS
HOLLOW PIN CHAINS
P Tsubaki Curved chain has the additional clearance between the pins, bushings, roller links and pin links to allow for extra flexibility and greater lateral displacement. The basic dimensions of this chain are equal to the dimensions of standard roller chains. F
D NOTE: Tsubaki’s unique design of the curved chain does not taper the pin diameter. This allows the pin diameter to be uniform throughout the chain.
h
L1
F
P
W
L2
B
D
T
L1
W
L2
B
T
P
F
Single Pitch Hollow Pin Standard attachments are available for Hollow Pin (HP) chain. Cross rods may be inserted without taking the chain apart.
D
L1
W
r
Width Between Roller Link Plates
Average Tensile Strength
Maximum Allowable Load
Approx. Weight lbs/ft
L2
Bushing Diamater
Tsubaki
Pitch
Pin
Plate
R
T
Chain No.
P
W
B
D
F
L1
L2
H
T
40HPB 50HPB 60HPB 80HPB
0.500 0.625 0.750 1.000
0.312 0.375 0.500 0.625
0.312 0.400 0.469 0.625
0.224 0.284 0.330 0.448
0.157 0.202 0.236 0.316
0.315 0.396 0.494 0.640
0.374 0.459 0.561 0.701
0.472 0.591 0.713 0.949
0.060 0.080 0.094 0.125
2,430 4,410 5,950
397 705 948
0.36 0.58 0.85 1.60
10,800
1,720
P
F
Width Between Roller Link Plates
Min. Radius of Side Bow Inches
h
Average Tensile Strength
Maximum Allowable Load
D
Roller Diameter
Tsubaki
Pitch
Pin
Plate
L1
F
P
W
L2
Chain No. 35CURB▲
P
W
R
D
L1
L2
L1 & L2
H
h
T
r
B
D
T
0.375 0.500 0.625 0.750 1.000
0.188 0.312 0.375 0.500 0.625
0.200* 0.312 0.400 0.469 0.625
0.125 0.156 0.200 0.234 0.312
0.238 0.333 0.417 0.522 0.659
0.301 0.384 0.488 0.593 0.789
0.539 0.717 0.905 1.115 1.448
0.354 0.472 0.591 0.713 0.949
0.307 0.409 0.512 0.614 0.819
0.050 0.060 0.080 0.094 0.125
1,800 3,480 5,420 7,830
210 420 640 900
10 14 16 20 24
L1
40CURB 50CURB 60CURB 80CURB
W
L2
B
T
13,840
1,560
P
F
D
L1
W
L2
R
Approx. Weight lbs./Ft
Additional Weight Per Attachment lbs./ft
Tsubaki
Attachment
T
Chain No. 35CURB▲
C
N
O
S
X
A Att. 0.002 0.004 0.007 0.015 0.029
K Att. 0.003 0.009 0.013 0.031 0.057
Width Between Roller Link Plates
Average Tensile Strength
Maximum Allowable Load
Approx. Weight lbs/ft
Roller Diameter
Bushing Diameter
Tsubaki
Pitch
Pin
Plate
0.22 0.41 0.68 0.94 1.66
0.375 0.500 0.626 0.750 1.000
0.311 0.374 0.500 0.625 0.752
0.102 0.141 0.205 0.205 0.268
0.250 0.315 0.406 0.469 0.626
0.571 0.709 0.933 1.122 1.461
40CURB 50CURB 60CURB 80CURB
Chain No.
P
W
B
R
D
F
L1
L2
H
T
STANDARD ROLLER C2040HPB
1.000 1.250 1.500 2.000 1.000 1.250 1.500 2.000
0.312 0.375 0.500 0.625 0.312 0.375 0.500 0.625
0.625 0.750 0.875 1.125
0.224 0.284 0.330 0.448 0.224 0.284 0.330 0.448
0.157 0.202 0.236 0.316 0.157 0.202 0.236 0.316
0.315 0.396 0.494 0.640 0.315 0.396 0.494 0.640
0.374 0.459 0.561 0.701 0.374 0.459 0.561 0.701
0.472 0.591 0.677 0.906 0.472 0.591 0.677 0.906
0.060 0.080 0.094 0.125
2,430 4,410 5,950
397 705 948
0.36 0.58 0.85 1.60 0.55 0.81 1.38 1.89
C2050HPB C2060HPB C2080HPB
NOTE: Rollerless (bushing only)
10,800
1,720
OVERSIZED ROLLER C2042HPB
0.625 0.500 0.875 1.125
0.06 0.08
2,430 4,410 5,950
397 705 948
C2052HPB C2062HPB C2082HPB
0.094 0.125
10,800
1,720
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