No. 25
PLAIN BORE SPROCKET DIMENSIONS
U.S. TSUBAKI STOCK SPROCKETS
HOW TO ORDER
U.S. Tsubaki Stock Sprockets
All dimensions in inches unless noted.
Chain Data Size
No. 25 Plain Bore Sprocket Diameters
Type “A” Plain Bore
Type “B” Plain Bore
25
No.
No. Teeth
Outside Diameter
Pitch Diameter
Caliper Diameter
Plain Bore
Wt. Lbs.
Plain Bore 0.250 0.250 0.250 0.250 0.250 0.250 0.250 0.250 0.250 0.250 0.250 0.250 0.250 0.250 0.250 0.375 0.375 0.375 0.375 0.375 0.375 0.375 0.375 0.500 0.500 0.500 0.500 0.500 0.500
MAX Bore*
Hub Dia.
Wt. Lbs. 0.03 0.03 0.04 0.06 0.07 0.08 0.10 0.12 0.14 0.16 0.19 0.25 0.28 0.31 0.32 0.33 0.34 0.35 0.36 0.38 0.40 0.46 0.50 0.53 0.56 0.56 1.00 1.10 1.30
LTB Style
Pitch
1/4" 1/8"
1/4" Pitch: PLAIN BORE How to Order Code: Example Model # for 25 Pitch Plain Bore Sprockets 25
Inside Width
S S S S S S S S S S S S S S S S S S S S S S S E E E E E E
9
0.837 0.919 1.002 1.083 1.167 1.246 1.326 1.407 1.487 1.568 1.648 1.729 1.809 1.889 1.969 2.049 2.129 2.209 2.369 2.529 2.688 2.928 3.008 3.327 3.725 3.964 4.442 4.920 5.876
0.731 0.809 0.870 0.996 1.045 1.124 1.203 1.282 1.361 1.440 1.519 1.598 1.678 1.757 1.836 1.915 1.995 2.074 2.233 2.392 2.551 2.789 2.889 3.187 3.584 3.823 4.300 4.777 5.732
0.591 0.679 0.748 0.836 0.907 0.994 1.066 1.152 1.225 1.310 1.383 1.468 1.543 1.627 1.702 1.785 1.861 1.944 2.103 2.262 2.421 2.656 2.739 3.057 3.452 3.693 4.170 4.647 5.602
NS NS NS NS NS NS
NS NS NS NS NS NS
0.250 0.438 0.500 0.250 0.500 0.500 0.313 0.563 0.500 0.375 0.625 0.500 0.438 0.781 0.500 0.563 0.813 0.500 0.563 0.891 0.500 0.563 0.969 0.500 0.625 1.031 0.500 0.750 1.125 0.500 0.813 1.219 0.500 0.875 1.281 0.625 0.875 1.375 0.625 0.938 1.438 0.625 1.000 1.500 0.625 1.000 1.500 0.625 1.000 1.500 0.625 1.000 1.500 0.625 1.000 1.500 0.625 1.000 1.500 0.625 1.000 1.500 0.625 1.000 1.500 0.625 1.000 1.500 0.750 1.375 2.000 0.750 1.375 2.000 0.750 1.375 2.000 0.750 1.375 2.000 0.750 1.375 2.000 0.750 1.375 2.000 0.750
Roller Diameter
0.130" 0.110"
10
Nominal Tooth Width:
11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 28 30 32 35 36 40 45 48 54 60 72
A 25 A 36
0.250 0.250 0.250 0.250 0.250 0.250 0.375 0.375 0.375 0.375 0.375 0.375 0.375 0.375 0.375 0.375 0.375 0.500 0.500 0.500 0.500 0.500 0.500
0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.060 0.060 0.080 0.080 0.090 0.100 0.120 0.140 0.160 0.180 0.200 0.250 0.320 0.380 0.540 0.740
Altered !!
Chain Pitch in Inches
Hub Type
Number of Teeth
15 16 17 18 19 20
21 22 23 24 25 26 17 18 19 20 21 22 23 24
28 30 32 35 36 40 25 26 28 30 32 35 36 40
45 48 54 60 72 45 48 54 60 72
A: No Hub
Extension
9
A: Alteration Required
25: 1/4" Pitch
10 11 12 13 14 15 16
B: Hub Extension One Side
!! Alteration field only to be denoted if a deviation from standard is required. Please reference Alterations in engineering section, page 210.
TOOTH (NOMINAL) .110˝
.110˝ NOMINAL
.110˝ NOMINAL
TOOTH (NOMINAL)
TOOTH (NOMINAL)
NOMINAL
* Dimensions shown allow for standard keyway with set screw at 90 degrees NS = Non Stock
LTB
LTB
TYPEA
STYLES TYPEB
STYLEE TYPEB
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