Mechanical clamping unit BJ156-A

workpiecesteelblack oxide-finished

Description
This strap clamp assembly delivers substantial clamping force for holding dies, fixtures and workpieces across a wide range of machine tools. The long mounting slot enables extensive clamp travel and precise positioning. The strap end is tapped to accept support hardware. Studs are manufactured from 4135 steel, quenched and tempered with a black oxide finish; the strap clamp body and remaining components are made from 1045 steel, quenched and tempered with a black oxide finish. Available with M8×1.25 or M10×1.50 threads across multiple SKU lengths and configurations; clamping force varies by SKU (see part options).

Product Types

• BJ156-A — Strap Clamps — Tapped-radius clamp assemblies, type A
• BJ156-B — Strap Clamps — Tapped-radius clamp assemblies, type B

Part Options (table)
Detail | ID | SKU | Thread | L | L1 | L2 | L3 | L4 | W | H Max. | H1 | H2 | H3 | H4 | Clamping Force Min. (Lbs) | Clamping Force Max. (Lbs) | Screw Torque (ft/lbs) | PN
Row | 142484 | BJ156-08050A1 | M8×1.25 | 50 | 12 | 14 | 14 | 5 | 19 | 51 | 15 - 25 | 12 | 12 | 22 - 12 | 1,050 | 1,500 | 13 |
Row | 142485 | BJ156-08050A2 | M8×1.25 | 50 | 12 | 14 | 14 | 5 | 19 | 66 | 20 - 35 | 12 | 14 | 27 - 12 | 1,050 | 1,500 | 13 |
Row | 142486 | BJ156-08063A1 | M8×1.25 | 63 | 12 | 27 | 27 | 5 | 19 | 51 | 15 - 25 | 12 | 12 | 22 - 12 | 800 | 1,500 | 13 |
Row | 142487 | BJ156-08063A2 | M8×1.25 | 63 | 12 | 27 | 27 | 5 | 19 | 66 | 20 - 35 | 12 | 14 | 27 - 12 | 800 | 1,500 | 13 |
Row | 142488 | BJ156-08080A1 | M8×1.25 | 80 | 15 | 34 | 34 | 5 | 19 | 55 | 15 - 25 | 16 | 12 | 22 - 12 | 800 | 1,500 | 13 |
Row | 142489 | BJ156-08080A2 | M8×1.25 | 80 | 15 | 34 | 34 | 5 | 19 | 66 | 20 - 35 | 16 | 14 | 27 - 12 | 800 | 1,500 | 13 |
Row | 142490 | BJ156-10063A1 | M10×1.50 | 63 | 15 | 18 | 18 | 5 | 25 | 62 | 20 - 30 | 12 | 18 | 20 - 10 | 1,650 | 2,400 | 25 |
Row | 142491 | BJ156-10063A2 | M10×1.50 | 63 | 15 | 18 | 18 | 5 | 25 | 80 | 25 - 45 | 12 | 20 | 30 - 10 | 1,650 | 2,400 | 25 |
Row | 142492 | BJ156-10080A1 | M10×1.50 | 80 | 15 | 32 | 32 | 5 | 25 | 63 | 20 - 30 | 16 | 18 | 20 - 10 | 2,000 | 3,350 | 33 |
Row | 142493 | BJ156-10080A2 | M10×1.50 | 80 | 15 | 32 | 32 | 5 | 25 | 80 | 25 - 45 | 16 | 20 | 30 - 10 | 2,000 | 3,350 | 33 |

Media
Specifications PDF available for this product.

Technical specifications

• Application: Holds down dies, fixtures and workpieces on a wide variety of machines
• Mounting: Long mounting slot for wide range of clamp movement and positioning
• Strap end: Tapped for support
• Stud material: 4135 steel, quenched and tempered, black oxide finish
• Strap clamp body & other parts: 1045 steel, quenched and tempered, black oxide finish
• Available thread sizes: M8×1.25 and M10×1.50 (various SKU lengths and configurations)
• Clamping force range (varies by SKU): approx. 800 to 3,350 lbs (see part options table for per-SKU values)