Pilot Bore Sprockets
The term “plain bored” sprocket is associated with A and B style sprockets. There is no special machining performed to accommodate keyways or set screws, only to accommodate the shaft diameter. However plain bore sprockets typically need additionally machining before installation.
Pilot Bore Sprockets are typically bossed and available in single or double hubs are used in many different industries to transmit rotary motion between two shafts where gears are unsuitable.
TransDrive supply pilot bore sprockets in a range of sizes that comply with British Standards (BS) and American Standards (ANSI) including:

British Standards (BS) Type A | British Standards (BS) Type B | American Standards (ANSI) Type A | American Standards (ANSI) Type B & C |
---|---|---|---|
03B | 03B | 25 | 25 |
04B | 04B | 35 | 35 |
05B | 05B | 40 | 40 |
06B | 06B | 41 | 41 |
08B | 08B | 50 | 50 |
10B | 10B | 60 | 60 |
12B | 12B | 80 | 80 |
16B | 16B | 100 | 100 |
20B | 20B | 120 | 120 |
24B | 24B | 140 | 140 |
28B | 28B | 160 | 160 |
32B | 32B | 180 | 180 |
– | – | 200 | 200 |
– | – | 240 | 240 |