1
Information required for drums not listed in this catalog:
BRAKE DRUMS
1. Wheel or Hub Number
2. Make and Number of Axle
3. Manufacturer’s Brake Drum Number HOW TO MEASURE BRAKE DRUMS
4. Drum Type (See Page 3)
When selecting a replacement drum, the manufacturer’s name and part number is helpful. If this information is not available, a replacement drum can be selected by comparing dimensions. A drawing is shown below which indicates the dimensions required to determine the existence of a replacement drum. If all of the dimensions shown are not available, we must have at least dimensions C, D, E, J, K and O to make a selection. 5. Actual Brake Drum Dimensions (See Figure Below)
A. Overall diameter of drum B. Dust shield recess diameter, if applicable C. Brake surface diameter D. Overall depth E. Brake surface flat
F. Depth of dust shield recess G. Squeeler band thickness H. Distance from outside of backface to start of taper I. Inside finished diameter J. Bolt circle diameter K. Pilot Diameter L. Outside finished diameter M. Diameter at taper N. Backplate thickness O. Bolt holes: number and size
A. Overall Diameter of Drum
I. Inside Finished Diameter J. Bolt Circle Diameter
B. Dust Shield Recess Diameter, If Applicable
C. Brake Surface Diameter D. Overall Depth OTR ™ BRAKE DRUM SPECIFICATIONS K. Pilot Diameter
L. Outside Finished Diameter M. Diameter at Taper N. Backplate Thickness BOLT CIRCLE DIAMETER O. Bolt Holes: Number and Size
E. Brake Surface Flat
BOLT HOLES & SIZE
F. Depth of Dust Shield Recess G. Squeeler Band Thickness H. Distance from Outside of Backface to Start of Taper OTR ™ PN BRAKE SIZE OTR1501B 15” × 4
PILOT DIAMETER
OVERALL DEPTH WEBB ®
GUNITE ® CROSS
CONMET ® CROSS
MERITOR ® CROSS
5 10 – 1.31 11.25 10 – 1.31 11.25
8.78 8.78
8.86 9.04
61528B 3721AX 107507 65548B 3800X 107164
— —
OTR1502B 15” × 4
56864 66864 66884 66893 67518 62200 66875 66895 68730 60876
3922X 3600AX 107885
OTR1601B 16.5” × 7 10 – 1.00 11.25
8.78
10.54
85123788002
OTR1602B 16.5” × 7 10 – 1.00 11.25
8.78 8.53 9.44 9.44
10.62 10.62
3576AX 10037819 85123365002
OTR1603 16.5” × 7 10 – .81
11.25
3166A — — 2983CX — — 2705X — —
OTR1605 16.5” × 7 5/6 – .78/.66 11.00
8.38 9.50
OTR1606 16.5” × 7 10 – .81 OTR1607 16.5” × 7 8 – 1.00 OTR1608B 16.5” × 7 10 – .81 OTR1610 16.5” × 7 10 – .81 OTR1611 16.5” × 7 10 – .81
11.25 10.83 11.25 11.25 11.25
9 9
10.62 10.62
3141BX 107875 3141X 107904
— —
9.5
8.75
3018AX — — 3120X — —
9.44 8.78 8.78 8.78 8.78 8.78 8.78 8.78 9.00
10.75 11.18
OTR1612 16.5” × 7 10 – 1.00 11.25 OTR1613B 16.5” × 5 10 – 1.31 11.25
66353F 3757
— —
9.04
65710B 3710X 10020147 — 66800B 3782X 10080760 — 66855B 3807X 10012097 —
OTR1614B 16.5” × 8
10 – 1.00 11.25
11.10 11.46 11.10 11.46
OTR1615B 16.5” × 8.62 10 – 1.00 11.25 OTR1658B 16.5” × 8.0 10 – 1.00 11.25 OTR16585B 16.5” × 8.62 10 – 1.00 11.25 OTR1656B 16.5” × 6.0 10 – 1.31 11.25
66800B 3782X 66854B 3807X 65152B 3687X
9.75
OTR1275B 12.25” × 7.5 8 – 1.00
10.83
11.22
63680F
3887X
49
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