Starrett 50599 Pin Vise 1mm Capacity 4 Inch

Product Description

The STARRETT 50599 is a precision pin vise designed for holding small-diameter workpieces, drill bits, and wire during hand-drilling, reaming, or twisting operations. It features a spring spiral design with a tapered collet jaw that provides maximum clamping surface across its capacity range. The overall length is 4.141 inches, with an overall diameter of 0.281 inches, making it a compact and balanced tool for close-tolerance hand work. Capacity tops out at 1mm, suited for fine-diameter work common in instrument repair, electronics, and precision machining trades.

This pin vise is intended for bench technicians, machinists, and precision tradespeople who need positive, consistent grip on small-diameter tools or stock. It is well suited for light-duty hand operations such as starting pilot holes, twisting wire, or chucking small drill bits or reamers where a standard drill chuck is impractical. The collet jaw style allows quick changes between similarly sized workpieces without additional tooling.

Key Features

• Spring spiral twist design for controlled hand rotation during precision work
• Tapered collet jaw provides maximum clamping surface at 1mm capacity
• Compact overall length of 4.141 inches for close-quarters bench use
• Overall diameter of 0.281 inches for comfortable single-hand grip
• Single-piece construction suited to instrument repair, electronics, and machining applications

Compatibility

Designed as a general-purpose precision pin vise for hand-held use with wire, small drill bits, and other round stock up to 1mm in diameter.

Installation Notes

No power tools or electrical shutoff procedures are required for this hand tool. Ensure the workpiece or bit is fully seated in the collet before tightening to avoid slippage during use. Do not exceed the stated 1mm capacity, as over-clamping can damage the tapered collet. Inspect the collet threads and spring mechanism periodically for wear or debris that could affect grip consistency.