Standard Keyseats
| Bore Range | Keyseat |
| 3/4″-7/8″ | 3/16″ x 3/32″ |
| 15/16 -1 1/4 | 1/4x 1/8 |
| 1 5/16 -1 3/8 | 5/16 x 5/32 |
| 1 7/16 -13/4 | 3/8 x 3/16 |
| 1 13/16 – 2 1/4 | 1/2 x 1/4 |
| 2 5/16 – 23/4 | 5/8 x 5/16 |
| 2 13/16 – 3 1/4 | 3/4 x 3/8 |
| 3 3/8-3 3/4 | 7/8 x 7/16 |
13/8″ Bore Bushing also available with 3/8×3/16″ Keyway
Bushing Dimension
| Part No. | Dimensions | Bore Range | Wt. Lbs | ||||||||
| M | L | G | X | E | T | U | D | H | |||
| Q1 | 225/32″ | 21/2″ | 3/4″ | 1 3/4″ | 9/32″ | 1 31/32″ | 17/32″ | 27/8″ | 41/8″ | 3/4″- 2 11/16″ | 3 1/2 |
| R1 | 35/32 | 27/8 | 7/8 | 2 | 9/32 | 21/4 | 5/8 | 4 | 53/8 | 1 1/8- 3 3/4 | 7 1/2 |
| Q2 | 325/32″ | 3 1/2″ | 3/4″ | 23/4″ | 9/32″ | 2 31/32″ | 17/32\” | 27/8″ | 41/8″ | 1″- 2 5/8″ | 4 1/2 |
| R2 | 5 5/32 | 4 7/8\” | 7/8 | 4 | 9/32 | 4 1/4 | 5/8 | 4 | 53/8 | 1 3/8 – 3 5/8 | 11 |
| S1 | 4 3/4 | 4 3/8 | 11/16 | 3 5/16 | 3/8 | 3 5/8 | 3/4 | 4 5/8 | 6 3/8 | 1 11/16 – 4 1/4 | 13 1/2 |
| U0 | 5 23/32 | 5 1/4 | 1 1/2 | 3 3/4 | 15/32 | 4 3/16 | 11/16 | 6 | 8 3/8 | 2 3/8 – 3 3/16 | 30 |
| U0 | 5 13/32 | 4 15/16 | 13/16 | 3 3/4 | 15/32 | 4 3/16 | 3/4 | 6 | 8 3/8 | 3 1/4 – 5 1/2 | 27 |
| DIAMETERS | 2 GROOVES, F = 1 3/4″ | ||||||||||||||
| Datum “A” | Datum “B” | Out- side | Inside | Part Number | Type | Dimensions | Wt.Less Bush. | ||||||||
| Sheave | Bush | O.L. | L | P | C | H | G | X | E | ||||||
| 5.0″ | 5.4″ | 5.75″ | — | 2B54Q | Q1 | 5 | 225/32″ | 21/2″ | 3/4″ | 0″ | 41/8″ | — | 13/4″ | 9/32″ | 6.00 |
| 5.2 | 5.6 | 5.95 | — | 2B56Q | Q1 | 5 | 225/32 | 21/2 | 3/4 | 0 | 41/8 | — | 13/4 | 9/32 | 7.30 |
| 5.4 | 5.8 | 6.15 | — | 2B58Q | Q1 | 5 | 225/32 | 21/2 | 3/4 | 0 | 41/8 | — | 13/4 | 9/32 | 7.90 |
| 5.6 | 6.0 | 6.35 | — | 2B60Q | Q1 | 5 | 225/32 | 21/2 | 3/4 | 0 | 41/8 | — | 13/4 | 9/32 | 8.90 |
| 5.8 | 6.2 | 6.55 | — | 2B62Q | Q1 | 5 | 225/32 | 21/2 | 3/4 | 0 | 41/8 | — | 13/4 | 9/32 | 9.40 |
| 6.0 | 6.4 | 6.75 | — | 2B64Q | Q1 | 5 | 225/32 | 21/2 | 3/4 | 0 | 41/8 | — | 13/4 | 9/32 | 10.10 |
| 6.2 | 6.6 | 6.95 | — | 2B66Q | Q1 | 5 | 225/32 | 21/2 | 3/4 | 0 | 41/8 | — | 13/4 | 9/32 | 11.10 |
| 6.4 | 6.8 | 7.15 | — | 2B68Q | Q1 | 5 | 225/32 | 21/2 | 3/4 | 0 | 41/8 | — | 13/4 | 9/32 | 12.30 |
| 15.0 | 15.4 | 15.8 | 13 7/8″ | 2B154R | R1 | 16-Arm | 35/32 | 27/8 | 1 | 1/8 | 53/8 | 7/8″ | 2 | 9/32 | 30.60 |
| 15.6 | 16.0 | 16.4 | 14 1/2 | 2B160R | R1 | 16-Arm | 35/32 | 27/8 | 1 | 1/8 | 53/8 | 7/8 | 2 | 9/32 | 32.00 |
| 18.0 | 18.4 | 18.8 | 16 7/8 | 2B184R | R1 | 16-Arm | 35/32 | 27/8 | 1 | 1/8 | 53/8 | 7/8 | 2 | 9/32 | 39.10 |
| 19.5 | 20.0 | 20.4 | 18 1/2 | 2B200R | R1 | 16-Arm | 35/32 | 27/8 | 1 | 1/8 | 53/8 | 7/8 | 2 | 9/32 | 43.50 |
| 24.5 | 25.0 | 25.4 | 23 1/2 | 2B250R | R1 | 16-Arm | 35/32 | 27/8 | 1 | 1/8 | 53/8 | 7/8 | 2 | 9/32 | 58.00 |
| 29.5 | 30.0 | 30.4 | 28 1/2 | 2B300R | R1 | 16-Arm | 35/32 | 27/8 | 1 | 1/8 | 53/8 | 7/8 | 2 | 9/32 | 81.00 |
| 37.5 | 38.0 | 38.4 | 36 1/2 | 2B380R | R1 | 16-Arm | 35/32 | 27/8 | 1 | 1/8 | 53/8 | 7/8 | 2 | 9/32 | 92.00 |
| DIAMETERS | 3 GROOVES, F = 21/2″ | ||||||||||||||
| Datum “A” | Datum “B” | Out- side | Inside | Part Number | Type | Dimensions | Wt.Less Bush. | ||||||||
| Sheave | Bush | O.L. | L | P | C | H | G | X | E | ||||||
| 5.0″ | 5.4″ | 5.75″ | 3 7/8″ | 3B54Q | Q1 | 5 | 317/32″ | 21/2″ | 3/4″ | 3/4″ | 41/8″ | — | 13/4″ | 9/32″ | 7.90 |
| 5.2 | 5.6 | 5.95 | 4 1/16 | 3B56Q | Q1 | 5 | 317/32 | 21/23 | 3/4 | 3/4 | 41/8 | — | 13/4 | 9/32 | 9.00 |
| 5.4 | 5.8 | 6.15 | 4 1/4 | 3B58Q | Q1 | 13-Web | 35/32 | 21/23 | 3/8 | 3/8 | 41/8 | 3/4 | 13/4 | 9/32 | 9.40 |
| 5.6 | 6.0 | 6.35 | 4 7/16 | 3B60Q | Q1 | 13-Web | 35/32 | 21/23 | 3/8 | 3/8 | 41/8 | 3/4 | 13/4 | 9/32 | 10.40 |
| 5.8 | 6.2 | 6.55 | 4 11/16 | 3B62Q | Q1 | 13-Web | 35/32 | 21/23 | 3/8 | 3/8 | 41/8 | 3/4 | 13/4 | 9/32 | 11.30 |
| 6.0 | 6.4 | 6.75 | 4 7/8 | 3B64Q | Q1 | 13-Web | 35/32 | 21/23 | 3/8 | 3/8 | 41/8 | 3/4 | 13/4 | 9/32 | 12.10 |
| 6.2 | 6.6 | 6.95 | 5 1/16 | 3B66Q | Q1 | 13-Web | 35/32 | 21/23 | 3/8 | 3/8 | 41/8 | 3/4 | 13/4 | 9/32 | 13.00 |
| 6.4 | 6.8 | 7.15 | 5 1/4 | 3B68Q | Q1 | 13-Web | 35/32 | 21/23 | 3/8 | 3/8 | 41/8 | 3/4 | 13/4 | 9/32 | 14.30 |
| 15.0 | 15.4 | 15.8 | 13 7/8 | 3B154R | R1 | 13-Arm | 313/32 | 27/85 | 5/8 | 1/4 | 53/8 | 7/8 | 2 | 9/32 | 35.50 |
| 15.6 | 16.0 | 16.4 | 14 1/2 | 3B160R | R1 | 13-Arm | 313/32 | 27/85 | 5/8 | 1/4 | 53/8 | 7/8 | 2 | 9/32 | 38.00 |
| 18.0 | 18.4 | 18.8 | 16 7/8 | 3B184R | R1 | 13-Arm | 313/32 | 27/85 | 5/8 | 1/4 | 53/8 | 7/8 | 2 | 9/32 | 44.80 |
| 19.5 | 20.0 | 20.4 | 18 1/2 | 3B200R | R1 | 13-Arm | 313/32 | 27/85 | 5/8 | 1/4 | 53/8 | 7/8 | 2 | 9/32 | 50.30 |
| 24.5 | 25.0 | 25.4 | 23 1/2 | 3B250R | R1 | 13-Arm | 313/32 | 27/85 | 5/8 | 1/4 | 53/8 | 7/8 | 2 | 9/32 | 65.00 |
| 29.5 | 30.0 | 30.4 | 28 1/2 | 3B300R | R1 | 13-Arm | 313/32 | 27/85 | 5/8 | 1/4 | 53/8 | 7/8 | 2 | 9/32 | 89.00 |
| 37.5 | 38.0 | 38.4 | 36 1/2 | 3B380R | R1 | 13-Arm | 313/32 | 27/8 | 5/8 | 1/4 | 53/8 | 7/8 | 2 | 9/32 | 106.00 |
| DIAMETERS | 4 GROOVES,F=3 1/4″ | ||||||||||||||
| Datum “A” | Datum “B” | Out- side | Inside | Part Number | Type | Dimensions | Wt.Less Bush. | ||||||||
| Sheave | Bush | O.L. | L | P | C | H | G | X | E | ||||||
| 5.0″ | 5.4″ | 5.75″ | 3 7/8″ | 4B54Q | Q1 | 5 | 4 9/32″ | 21/2″ | 3/4″ | 11/2″ | 41/8″ | — | 13/4″ | 9/32″ | 9.30 |
| 5.2 | 5.6 | 5.95 | 4 1/16 | 4B56Q | Q1 | 5 | 4 9/32 | 21/2 | 3/4 | 11/2 | 41/8 | — | 13/4 | 9/32 | 10.50 |
| 5.4 | 5.8 | 6.15 | 4 1/4 | 4B58Q | Q1 | 13-Web | 317/32 | 21/2 | 0 | 3/4 | 41/8 | 3/4″ | 13/4 | 9/32 | 11.50 |
| 5.6 | 6.0 | 6.35 | 4 7/16 | 4B60Q | Q1 | 13-Web | 317/32 | 21/2 | 0 | 3/4 | 41/8 | 3/4 | 13/4 | 9/32 | 12.60 |
| 5.8 | 6.2 | 6.55 | 4 11/16 | 4B62Q | Q1 | 13-Web | 317/32 | 21/2 | 0 | 3/4 | 41/8 | 3/4 | 13/4 | 9/32 | 12.60 |
| 6.0 | 6.4 | 6.75 | 4 7/8 | 4B64Q | Q1 | 13-Web | 317/32 | 21/2 | 0 | 3/4 | 41/8 | 3/4 | 13/4 | 9/32 | 14.10 |
| 6.2 | 6.6 | 6.95 | 5 1/16 | 4B66Q | Q1 | 13-Web | 317/32 | 21/2 | 0 | 3/4 | 41/8 | 3/4 | 13/4 | 9/32 | 14.80 |
| 6.4 | 6.8 | 7.15 | 5 1/4 | 4B68Q | Q1 | 13-Web | 317/32 | 21/2 | 0 | 3/4 | 41/8 | 3/4 | 13/4 | 9/32 | 16.90 |
| 15.0 | 15.4 | 15.8 | 13 7/8 | 4B154R | R1 | 13-Arm | 325/32 | 27/8 | 1/4 | 5/8 | 53/8 | 7/8 | 2 | 9/32 | 40.10 |
| 15.6 | 16.0 | 16.4 | 14 1/2 | 4B160R | R1 | 13-Arm | 325/32 | 27/8 | 1/4 | 5/8 | 53/8 | 7/8 | 2 | 9/32 | 44.00 |
| 18.0 | 18.4 | 18.8 | 16 7/8 | 4B184R | R1 | 13-Arm | 325/32 | 27/8 | 1/4 | 5/8 | 53/8 | 7/8 | 2 | 9/32 | 50.30 |
| 19.5 | 20.0 | 20.4 | 18 1/2 | 4B200R | R1 | 13-Arm | 325/32 | 27/8 | 1/4 | 5/8 | 53/8 | 7/8 | 2 | 9/32 | 54.00 |
| 24.5 | 25.0 | 25.4 | 23 1/2 | 4B250R | R1 | 13-Arm | 325/32 | 27/8 | 1/4 | 5/8 | 53/8 | 7/8 | 2 | 9/32 | 71.00 |
| 29.5 | 30.0 | 30.4 | 28 1/2 | 4B300R | R1 | 13-Arm | 325/32 | 27/8 | 1/4 | 5/8 | 53/8 | 7/8 | 2 | 9/32 | 99.00 |
| 37.5 | 38.0 | 38.4 | 36 1/2 | 4B380R | R1 | 13-Arm | 325/32 | 27/8 | 1/4 | 5/8 | 53/8 | 7/8 | 2 | 9/32 | 126.00 |
| DIAMETERS | 5 GROOVES, F = 4″ | ||||||||||||||
| Datum “A” | Datum “B” | Out- side | Inside | Part Number | Type | Dimensions | Wt.Less Bush. | ||||||||
| Sheave | Bush | O.L. | L | P | C | H | G | X | E | ||||||
| 6.6″ | 7.0″ | 7.35″ | 5 1/2″ | 5B70R | R1 | 15-Web | 4 5/32″ | 27/8″ | 1/8″ | 1″ | 53/8″ | 7/8″ | 2″ | 9/32″ | 17.00 |
| 7.0 | 7.4 | 7.75 | 5 7/8 | 5B74R | R1 | 15-Web | 4 5/32 | 27/8 | 1/8 | 1 | 53/8 | 7/8 | 2 | 9/32 | 20.30 |
| 7.6 | 8.0 | 8.35 | 6 1/2 | 5B80R | R1 | 15-Web | 4 5/32 | 27/8 | 1/8 | 1 | 53/8 | 7/8 | 2 | 9/32 | 24.80 |
| 8.2 | 8.6 | 8.95 | 7 1/16 | 5B86R | R1 | 15-Web | 4 5/32 | 27/8 | 1/8 | 1 | 53/8 | 7/8 | 2 | 9/32 | 27.30 |
| 8.6 | 9.0 | 9.35 | 7 1/2 | 5B90R | R1 | 15-Web | 4 5/32 | 27/8 | 1/8 | 1 | 53/8 | 7/8 | 2 | 9/32 | 29.10 |
| 9.0 | 9.4 | 9.75 | 7 7/8 | 5B94R | R1 | 15-Web | 4 5/32 | 27/8 | 1/8 | 1 | 53/8 | 7/8 | 2 | 9/32 | 30.00 |
| 10.6 | 11.0 | 11.4 | 9 1/2 | 5B110R | R1 | 15-Arm | 4 5/32 | 27/8 | 1/8 | 1 | 53/8 | 7/8 | 2 | 9/32 | 32.80 |
| 12.0 | 12.4 | 12.8 | 10 7/8 | 5B124R | R1 | 15-Arm | 4 5/32 | 27/8 | 1/8 | 1 | 53/8 | 7/8 | 2 | 9/32 | 36.00 |
| 13.2 | 13.6 | 14 | 12 1/16 | 5B136R | R1 | 15-Arm | 4 5/32 | 27/8 | 1/8 | 1 | 53/8 | 7/8 | 2 | 9/32 | 40.30 |
| 15.0 | 15.4 | 15.8 | 13 7/8 | 5B154R | R1 | 15-Arm | 4 5/32 | 27/8 | 1/8 | 1 | 53/8 | 7/8 | 2 | 9/32 | 45.00 |
| 15.6 | 16.0 | 16.4 | 14 1/2 | 5B160R | R1 | 15-Arm | 4 5/32 | 27/8 | 1/8 | 1 | 53/8 | 7/8 | 2 | 9/32 | 48.00 |
| 18.0 | 18.4 | 18.8 | 16 7/8 | 5B184R | R1 | 15-Arm | 4 5/32 | 27/8 | 1/8 | 1 | 53/8 | 7/8 | 2 | 9/32 | 54.00 |
| 19.5 | 20.0 | 20.4 | 18 1/2 | 5B200R | R1 | 15-Arm | 4 5/32 | 27/8 | 1/8 | 1 | 53/8 | 7/8 | 2 | 9/32 | 64.00 |
| 24.5 | 25.0 | 25.4 | 23 1/2 | 5B250R | R1 | 15-Arm | 4 5/32 | 27/8 | 1/8 | 1 | 53/8 | 7/8 | 2 | 9/32 | 79.00 |
| 29.5 | 30.0 | 30.4 | 28 1/2 | 5B300R | R1 | 15-Arm | 4 5/32 | 27/8 | 1/8 | 1 | 53/8 | 7/8 | 2 | 9/32 | 115.00 |
| 37.5 | 38.0 | 38.4 | 36 1/2 | 5B380R | R1 | 15-Arm | 4 5/32 | 27/8 | 1/8 | 1 | 53/8 | 7/8 | 2 | 9/32 | 150.00 |
| DIAMETERS | 6 GROOVES, F = 4 3/4″ | ||||||||||||||
| Datum “A” | Datum “B” | Out- side | Inside | Part Number | Type | Dimensions | Wt.Less Bush. | ||||||||
| Sheave | Bush | O.L. | L | P | C | H | G | X | E | ||||||
| 6.6″ | 7.0″ | 7.35″ | 5 1/2″ | 6B70R | R1 | 15-Web | 4 3/4″ | 27/8″ | 1/2″ | 13/8″ | 53/8″ | 7/8″ | 2″ | 9/32″ | 19.00 |
| 7.0 | 7.4 | 7.75 | 5 7/8 | 6B74R | R1 | 15-Web | 4 3/4 | 27/8 | 1/2 | 1 3/8 | 53/8 | 7/8 | 2 | 9/32 | 21.80 |
| 7.6 | 8.0 | 8.35 | 6 1/2 | 6B80R | R1 | 15-Web | 4 3/4 | 27/8 | 1/2 | 1 3/8 | 53/8 | 7/8 | 2 | 9/32 | 26.80 |
| 8.2 | 8.6 | 8.95 | 7 1/16 | 6B86R | R1 | 15-Web | 4 3/4 | 27/8 | 1/2 | 1 3/8 | 53/8 | 7/8 | 2 | 9/32 | 29.40 |
| 8.6 | 9.0 | 9.35 | 7 1/2 | 6B90R | R1 | 15-Web | 4 3/4 | 27/8 | 1/2 | 1 3/8 | 53/8 | 7/8 | 2 | 9/32 | 31.40 |
| 9.0 | 9.4 | 9.75 | 7 7/8 | 6B94R | R1 | 15-Web | 4 3/4 | 27/8 | 1/2 | 1 3/8 | 53/8 | 7/8 | 2 | 9/32 | 32.80 |
| 10.6 | 11.0 | 11.4 | 9 1/2 | 6B110R | R1 | 15-Arm | 4 3/4 | 27/8 | 1/2 | 1 3/8 | 53/8 | 7/8 | 2 | 9/32 | 37.00 |
| 12.0 | 12.4 | 12.8 | 10 7/8 | 6B124R | R1 | 15-Arm | 4 3/4 | 27/8 | 1/2 | 1 3/8 | 53/8 | 7/8 | 2 | 9/32 | 39.40 |
| 13.2 | 13.6 | 14 | 12 1/16 | 6B136R | R1 | 15-Arm | 4 3/4 | 27/8 | 1/2 | 1 3/8 | 53/8 | 7/8 | 2 | 9/32 | 45.30 |
| 15.0 | 15.4 | 15.8 | 13 7/8 | 6B154R | R1 | 15-Arm | 4 3/4 | 27/8 | 1/2 | 1 3/8 | 53/8 | 7/8 | 2 | 9/32 | 49.10 |
| 15.6 | 16.0 | 16.4 | 14 1/2 | 6B160R | R1 | 15-Arm | 4 3/4 | 27/8 | 1/2 | 1 3/8 | 53/8 | 7/8 | 2 | 9/32 | 52.00 |
| 18.0 | 18.4 | 18.8 | 16 7/8 | 6B184R | R1 | 15-Arm | 4 3/4 | 27/8 | 1/2 | 1 3/8 | 53/8 | 7/8 | 2 | 9/32 | 59.00 |
| 19.5 | 20.0 | 20.4 | 18 1/2 | 6B200R | R1 | 15-Arm | 4 3/4 | 27/8 | 1/2 | 1 3/8 | 53/8 | 7/8 | 2 | 9/32 | 69.00 |
| 24.5 | 25.0 | 25.4 | 23 1/2 | 6B250R | R1 | 15-Arm | 4 3/4 | 27/8 | 1/2 | 1 3/8 | 53/8 | 7/8 | 2 | 9/32 | 83.00 |
| 29.5 | 30.0 | 30.4 | 28 1/2 | 6B300R | R1 | 15-Arm | 4 3/4 | 27/8 | 1/2 | 1 3/8 | 53/8 | 7/8 | 2 | 9/32 | 126.00 |
| 37.5 | 38.0 | 38.4 | 36 1/2 | 6B380R | R1 | 15-Arm | 4 3/4 | 27/8 | 1/2 | 1 3/8 | 53/8 | 7/8 | 2 | 9/32 | 170.00 |
| DIAMETERS | 8 GROOVS,F=6 1/4″ | ||||||||||||||
| Datum “A” | Datum “B” | Out- side | Inside | Part Number | Type | Dimensions | Wt.Less Bush. | ||||||||
| Sheave | Bush | O.L. | L | P | C | H | G | X | E | ||||||
| 5.0″ | 5.4″ | 5.75″ | 3 7/8″ | 8B54Q | Q2 | 5 | 7 9/32″ | 3 1/2″ | 3/4″ | 31/2″ | 41/8″ | — | 23/4″ | 9/32″ | 18.10 |
| 5.2 | 5.6 | 5.95 | 4 1/16 | 8B56Q | Q2 | 5 | 7 9/32 | 3 1/2 | 3/4 | 31/2 | 41/8 | — | 23/4 | 9/32 | 20.60 |
| 5.4 | 5.8 | 6.15 | 4 1/4 | 8B58Q | Q2 | 15-Web | 6 1/4 | 3 1/2 | 2 | 3/4 | 41/8 | 3/4″ | 23/4 | 9/32 | 20.90 |
| 5.6 | 6.0 | 6.35 | 4 7/16 | 8B60Q | Q2 | 15-Web | 6 1/4 | 3 1/2 | 2 | 3/4 | 41/8 | 3/4 | 23/4 | 9/32 | 23.00 |
| 5.8 | 6.2 | 6.55 | 4 11/16 | 8B62Q | Q2 | 15-Web | 6 1/4 | 3 1/2 | 2 | 3/4 | 41/8 | 3/4 | 23/4 | 9/32 | 23.00 |
| 6.0 | 6.4 | 6.75 | 4 7/8 | 8B64Q | Q2 | 15-Web | 6 1/4 | 3 1/2 | 2 | 3/4 | 41/8 | 3/4 | 23/4 | 9/32 | 25.00 |
| 6.2 | 6.6 | 6.95 | 5 1/16 | 8B66Q | Q2 | 15-Web | 6 1/4 | 3 1/2 | 2 | 3/4 | 41/8 | 3/4 | 23/4 | 9/32 | 27.30 |
| 6.4 | 6.8 | 7.15 | 5 1/4 | 8B68Q | Q2 | 15-Web | 6 1/4 | 3 1/2 | 2 | 3/4 | 41/8 | 3/4 | 23/4 | 9/32 | 31.10 |
| 6.6 | 7.0 | 7.35 | 5 1/2 | 8B70R | R2 | 15-Web | 6 9/32 | 4 7/8 | 1/4 | 1 1/8 | 53/8 | 7/8 | 4 | 9/32 | 29.50 |
| 7.0 | 7.4 | 7.75 | 5 7/8 | 8B74R | R2 | 15-Web | 6 9/32 | 4 7/8 | 1/4 | 1 1/8 | 53/8 | 7/8 | 4 | 9/32 | 34.90 |
| 7.6 | 8.0 | 8.35 | 6 1/2 | 8B80R | R2 | 15-Web | 6 9/32 | 4 7/8 | 1/4 | 1 1/8 | 53/8 | 7/8 | 4 | 9/32 | 42.90 |
| 8.2 | 8.6 | 8.95 | 7 1/16 | 8B86R | R2 | 15-Web | 6 9/32 | 4 7/8 | 1/4 | 1 1/8 | 53/8 | 7/8 | 4 | 9/32 | 52.00 |
| 8.6 | 9.0 | 9.35 | 7 1/2 | 8B90R | R2 | 15-Web | 6 9/32 | 4 7/8 | 1/4 | 1 1/8 | 53/8 | 7/8 | 4 | 9/32 | 48.30 |
| 9.0 | 9.4 | 9.75 | 7 7/8 | 8B94R | R2 | 15-Web | 6 9/32 | 4 7/8 | 1/4 | 1 1/8 | 53/8 | 7/8 | 4 | 9/32 | 49.30 |
| 10.6 | 11.0 | 11.4 | 9 1/2 | 8B110R | R2 | 15-Web | 6 9/32 | 4 7/8 | 1/4 | 1 1/8 | 53/8 | 7/8 | 4 | 9/32 | 55.00 |
| 12.0 | 12.4 | 12.8 | 10 7/8 | 8B124R | R2 | 15-Arm | 6 9/32 | 4 7/8 | 1/4 | 1 1/8 | 53/8 | 7/8 | 4 | 9/32 | 60.00 |
| 13.2 | 13.6 | 14 | 12 1/16 | 8B136R | R2 | 15-Arm | 6 9/32 | 4 7/8 | 1/4 | 1 1/8 | 53/8 | 7/8 | 4 | 9/32 | 68.50 |
| 15.0 | 15.4 | 15.8 | 13 7/8 | 8B154R | R2 | 15-Arm | 6 9/32 | 4 7/8 | 1/4 | 1 1/8 | 53/8 | 7/8 | 4 | 9/32 | 77.30 |
| 18.0 | 18.4 | 18.8 | 16 7/8 | 8B184R | R2 | 15-Arm | 6 9/32 | 4 7/8 | 1/4 | 1 1/8 | 53/8 | 7/8 | 4 | 9/32 | 90.00 |
| 19.5 | 20.0 | 20.4 | 18 1/2 | 8B200R | R2 | 15-Arm | 6 9/32 | 4 7/8 | 1/4 | 1 1/8 | 53/8 | 7/8 | 4 | 9/32 | 96.00 |
| 24.5 | 25.0 | 25.4 | 23 1/2 | 8B250R | R2 | 15-Arm | 6 9/32 | 4 7/8 | 1/4 | 1 1/8 | 53/8 | 7/8 | 4 | 9/32 | 129.00 |
| 29.5 | 30.0 | 30.4 | 28 1/2 | 8B300R | R2 | 15-Arm | 6 9/32 | 4 7/8 | 1/4 | 1 1/8 | 53/8 | 7/8 | 4 | 9/32 | 163.00 |
| 29.5 | 30.0 | 30.4 | 28 1/2 | 8B300S | S1 | 15-Arm | 6 1/4 | 4 3/8 | 3/4 | 1 1/8 | 6 3/8 | 11/16 | 35/16 | 3/8 | 168.00 |
| 37.5 | 38.0 | 38.4 | 36 1/2 | 8B380R | R2 | 15-Arm | 6 9/32 | 4 7/8 | 1/4 | 1 1/8 | 53/8 | 7/8 | 4 | 9/32 | 228.00 |
| 37.5 | 38.0 | 38.4 | 36 1/2 | 8B380S | S1 | 15-Arm | 6 1/4 | 4 3/8 | 3/4 | 1 1/8 | 6 3/8 | 11/16 | 35/16 | 3/8 | 238.00 |
| DIAMETERS | 10 GROOVES,F=7 3/4″ | ||||||||||||||
| Datum “A” | Datum “B” | Out- side | Inside | Part Number | Type | Dimensions | Wt.Less Bush. | ||||||||
| Sheave | Bush | O.L. | L | P | C | H | G | X | E | ||||||
| 5.0″ | 5.4″ | 5.75″ | 3 7/8″ | 10B54Q | Q2 | 5 | 825/32″ | 3 1/2″ | 3/4″ | 5″ | 41/8″ | — | 23/4″ | 9/32″ | 21.50 |
| 5.2 | 5.6 | 5.95 | 4 1/16 | 10B56Q | Q2 | 5 | 825/32 | 3 1/2 | 3/4 | 5 | 41/8 | — | 23/4 | 9/32 | 24.90 |
| 5.4 | 5.8 | 6.15 | 4 1/4 | 10B58Q | Q2 | 15-Web | 7 3/4 | 3 1/2 | 3 1/2 | 3/4 | 41/8 | 3/4″ | 23/4 | 9/32 | 23.50 |
| 5.6 | 6.0 | 6.35 | 4 7/16 | 10B60Q | Q2 | 15-Web | 7 3/4 | 3 1/2 | 3 1/2 | 3/4 | 41/8 | 3/4 | 23/4 | 9/32 | 25.60 |
| 5.8 | 6.2 | 6.55 | 4 11/16 | 10B62Q | Q2 | 15-Web | 7 3/4 | 3 1/2 | 3 1/2 | 3/4 | 41/8 | 3/4 | 23/4 | 9/32 | 27.50 |
| 6.0 | 6.4 | 6.75 | 4 7/8 | 10B64Q | Q2 | 15-Web | 7 3/4 | 3 1/2 | 3 1/2 | 3/4 | 41/8 | 3/4 | 23/4 | 9/32 | 31.40 |
| 6.2 | 6.6 | 6.95 | 5 1/16 | 10B66Q | Q2 | 15-Web | 7 3/4 | 3 1/2 | 3 1/2 | 3/4 | 41/8 | 3/4 | 23/4 | 9/32 | 32.50 |
| 6.4 | 6.8 | 7.15 | 5 1/4 | 10B68Q | Q2 | 15-Web | 7 3/4 | 3 1/2 | 3 1/2 | 3/4 | 41/8 | 3/4 | 23/4 | 9/32 | 36.10 |
| 6.6 | 7.0 | 7.35 | 5 1/2 | 10B70R | R2 | 15-Web | 7 3/4 | 4 7/8 | 1 | 17/8 | 53/8 | 7/8 | 4 | 9/32 | 34.00 |
| 7.0 | 7.4 | 7.75 | 5 7/8 | 10B74R | R2 | 15-Web | 7 3/4 | 4 7/8 | 1 | 17/8 | 53/8 | 7/8 | 4 | 9/32 | 39.30 |
| 7.6 | 8.0 | 8.35 | 6 1/2 | 10B80R | R2 | 15-Web | 7 3/4 | 4 7/8 | 1 | 17/8 | 53/8 | 7/8 | 4 | 9/32 | 48.50 |
| 8.2 | 8.6 | 8.95 | 7 1/16 | 10B86R | R2 | 15-Web | 7 3/4 | 4 7/8 | 1 | 17/8 | 53/8 | 7/8 | 4 | 9/32 | 51.50 |
| 8.6 | 9.0 | 9.35 | 7 1/2 | 10B90R | R2 | 15-Web | 7 3/4 | 4 7/8 | 1 | 17/8 | 53/8 | 7/8 | 4 | 9/32 | 52.30 |
| 9.0 | 9.4 | 9.75 | 7 7/8 | 10B94R | R2 | 15-Web | 7 3/4 | 4 7/8 | 1 | 17/8 | 53/8 | 7/8 | 4 | 9/32 | 54.00 |
| 10.6 | 11.0 | 11.4 | 9 1/2 | 10B110R | R2 | 15-Arm | 7 3/4 | 4 7/8 | 1 | 17/8 | 53/8 | 7/8 | 4 | 9/32 | 61.00 |
| 12.0 | 12.4 | 12.8 | 10 7/8 | 10B124R | R2 | 15-Arm | 7 3/4 | 4 7/8 | 1 | 17/8 | 53/8 | 7/8 | 4 | 9/32 | 77.50 |
| 13.2 | 13.6 | 14 | 12 1/16 | 10B136R | R2 | 15-Arm | 7 3/4 | 4 7/8 | 1 | 17/8 | 53/8 | 7/8 | 4 | 9/32 | 76.50 |
| 15.0 | 15.4 | 15.8 | 13 7/8 | 10B154R | R2 | 15-Arm | 7 3/4 | 4 7/8 | 1 | 17/8 | 53/8 | 7/8 | 4 | 9/32 | 89.00 |
| 18.0 | 18.4 | 18.8 | 16 7/8 | 10B184R | R2 | 15-Arm | 7 3/4 | 4 7/8 | 1 | 17/8 | 53/8 | 7/8 | 4 | 9/32 | 104.00 |
| 19.5 | 20.0 | 20.4 | 18 1/2 | 10B200R | R2 | 15-Arm | 7 3/4 | 4 7/8 | 1 | 17/8 | 53/8 | 7/8 | 4 | 9/32 | 112.00 |
| 24.5 | 25.0 | 25.4 | 23 1/2 | 10B250R | R2 | 15-Arm | 7 3/4 | 4 7/8 | 1 | 17/8 | 53/8 | 7/8 | 4 | 9/32 | 153.00 |
| 29.5 | 30.0 | 30.4 | 28 1/2 | 10B300R | R2 | 15-Arm | 7 3/4 | 4 7/8 | 1 | 17/8 | 53/8 | 7/8 | 4 | 9/32 | 188.00 |
| 37.5 | 30.0 | 38.4 | 36 1/2 | 10B300R | R2 | 15-Arm | 7 3/4 | 4 7/8 | 1 | 17/8 | 53/8 | 7/8 | 4 | 9/32 | 258.00 |
| 37.5 | 38.0 | 38.4 | 36 1/2 | 10B380U | U0 | 15-Arm | 7 3/4 | 415/16 | 17/16 | 1 3/8 | 8 3/8 | 13/16 | 3 3/4 | 15/32 | 270.00 |