Gibraltar 76784560 6in D1-3 Semi-Steel Lathe Chuck Adapter Back Plate
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The Gibraltar Products 76784560 (FL11 160/D3) is a new 6-inch semi-steel lathe chuck adapter back plate designed to mount a 6" chuck onto a D1-3 (D3) camlock spindle nose. The plate is machined from semi-steel (high-strength cast iron/steel alloy) with a precision-ground front register and rear camlock pin bore pattern conforming to the ANSI/ASME B5.9 D1-3 camlock standard; three camlock stud pins, three socket-head cap screws, and three threaded chuck-mount studs are included as confirmed visible in the photos. The rear face features a piloted register that seats directly on the D1-3 spindle nose, and the front face presents a concentric bore and ring of threaded holes to accept the chuck body, enabling mounting of a 6" 3-jaw or 4-jaw chuck onto any lathe with a D1-3 spindle. Box label confirms net weight 6.2 lb, gross weight 6.6 lb, and packaged dimensions of 7" × 7" × 2"; the product is manufactured in China and sold new in original Gibraltar Products packaging.
Product Specifications
| Brand | Gibraltar Products |
| Model Number | 76784560 |
| Gibraltar Part No. | FL11 160/D3 |
| Chuck Size | 6 in |
| Spindle Nose Type | D1-3 (D3) Camlock |
| Camlock Standard | ANSI/ASME B5.9 D1-3 |
| Material | Semi-Steel (high-strength cast iron/steel alloy) |
| Net Weight | 6.2 lb |
| Gross Weight | 6.6 lb |
| Package Dimensions | 7 in x 7 in x 2 in |
| Includes | 3 camlock pins, 3 SHCS, 3 chuck-mount studs |
| Country of Origin | China |
| Condition | New |
