SKOOKUM HALF SIDED BLOCKS
12.5 TON TO 17.5 TON WORKING LOAD LIMIT 400-SERIES
- Work hardening manganese steel sheaves maximize wire rope and sheave life
- Equipped with tapered roller bearings for long life in higher line speed applications
- Recessed sheave prevents wire rope from binding between sheave and block side
- Half side for light weight or full side design to maximize sheave protection
- Versatile draw pin design allows for rapid reeving and exchange of attaching style
- Skookum half sided blocks are made with rugged cast alloy steel sides for demanding environments

SKOOKUM HALF SIDED DIMENSIONS
| Height | Thickness | Width | Throat Bottom |
Inside Throat Width |
Inside Yoke Width |
| A | B | C | D | E | Not Shown |
| HALF SIDED BLOCK | |||||
| 18.50 | 5.50 | 11.00 | 1.75 | 2.75 | 1.75 |
| 21.00 | 6.25 | 12.50 | 2.00 | 3.00 | 2.38 |
| 23.00 | 6.25 | 15.00 | 2.00 | 3.00 | 3.38 |
| 25.00 | 6.25 | 17.00 | 2.00 | 3.00 | 2.38 |
| 27.00 | 6.25 | 19.00 | 2.00 | 3.00 | 2.38 |
| FULL SIDED BLOCK | |||||
| 25.00 | 6.25 | 15.00 | 2.00 | 3.00 | 2.38 |
| 27.00 | 6.25 | 17.00 | 2.00 | 3.00 | 2.38 |
| Yoke Width Above | Yoke Width Below | Throat Height Below | Throat Height Above | Yoke Bar Top Height | Yoke Bar Width |
| G | Not Shown | J | K | L | M |
| HALF SIDED BLOCK | |||||
| 2.75 | 2.75 | 4.50 | 2.50 | 1.50 | 1.25 |
| 3.00 | 3.00 | 4.75 | 2.50 | 1.75 | 1.63 |
| 3.00 | 3.00 | 4.75 | 2.50 | 1.75 | 1.63 |
| 3.00 | 3.00 | 4.75 | 2.50 | 1.75 | 1.63 |
| 3.00 | 3.00 | 4.75 | 2.50 | 1.75 | 1.63 |
| FULL SIDED BLOCK | |||||
| 3.00 | 3.00 | 4.75 | 2.50 | 1.75 | 1.63 |
| 3.00 | 3.00 | 4.75 | 2.50 | 1.75 | 1.63 |
SPECIFICATIONS
| Model | Sheave Diam | Bearing | Regular Yoke Part # | Swivel Shackle Part # | Wire Rope Min |
| HALF SIDED BLOCK | |||||
| 410-A | 10″ | TRB | 553303 | 553302 | 5/8 |
| 412-A | 12″ | TRB | 558203 | 558202 | 3/4 |
| 414-A | 14″ | TRB | 558303 | 558302 | 3/4 |
| 416-A | 16″ | TRB | 558403 | 558402 | 3/4 |
| 418-A | 18″ | TRB | 558503 | 558502 | 7/8 |
| FULL SIDED BLOCK | |||||
| 414-T | 14″ | TRB | 573403 | 573402 | 7/8 |
| 416-T | 16″ | TRB | 573503 | 573502 | 3/4 |
| Model | Wire Rope Max | WLL (tons) |
Regular Yoke Weight | Swivel Shakle Weight |
Sheave # | Draw Pin |
| HALF SIDED BLOCK | ||||||
| 410-A | 3/4 | 12.50 | 48.00 | 55.00 | 536703 | 551422 |
| 412-A | 7/8 | 17.50 | 72.00 | 81.15 | 537103 | 555501 |
| 414-A | 7/8 | 17.50 | 95.75 | 104.90 | 537303 | 555501 |
| 416-A | 7/8 | 17.50 | 97.00 | 106.15 | 537503 | 555501 |
| 418-A | 1 | 17.50 | 108.00 | 117.15 | 537703 | 555501 |
| FULL SIDED BLOCK | ||||||
| 414-T | 1 | 17.50 | 97.00 | 106.15 | 537303 | 555501 |
| 416-T | 7/8 | 17.50 | 107.00 | 116.15 | 537503 | 555501 |



