How to Fit a Bench Pin & V-Slot Clamp for Jewellery Sawing
By Jewellery Tools UK — Hand Tools for Jewellers & Silversmiths | Published: 2026-10-31
Category: How-to Guides
Set up a clamp-on bench pin and V-slot hardwood platform for stable piercing and filing. Step-by-step fitting, clamping and sawing checks for jewellers.
Quick answer
Clamp the bench pin to the front edge of your bench so the V-slot sits just below eye level and the blade runs through the gap without obstruction. Tighten the C-clamp by hand, then test that the pin cannot shift before sawing.
Why the V-slot changes how you support small work
A standard flat pin gives you one supporting surface. The V-slot on this hardwood pin lets you rest rings and small pieces from either side while the saw blade works in the central gap. That means you can rotate the work without unclamping or repositioning the pin, which matters when piercing a pattern that crosses the centre of a ring band.
The trade-off is that very large or flat sheet pieces may not sit as securely in the V as they would on a plain pin. For those jobs, support the sheet with your free hand or use a separate flat pin, and keep the V-slot for rings, curves and small components.
Clamp placement and bench edge limits
The C-clamp needs a clean, flat bench edge to bite against. A bench edge that is rounded, damaged or covered by a mat can let the clamp creep under sawing pressure. Check the edge before fitting and remove any loose material.
The clamp is hand-tightened with a hook-shaped handle. Do not use pliers or a lever to over-tighten it; hand pressure is enough to hold the pin, and over-tightening can mark the bench or distort the clamp. If your bench top is delicate, place a thin scrap of softwood between the clamp jaw and the bench surface.
Step-by-step bench pin setup
- Choose and prepare the bench edge: Pick a front-edge position where you can sit comfortably with the pin at roughly chest height. Clean the edge and check it is flat and sound. Common mistake: clamping onto a rounded or padded edge, which lets the pin tilt while sawing. If the edge is not flat, move to another part of the bench or add a scrap wood packing piece.
- Position the pin and V-slot: Set the pin so the V-slot faces you and the gap sits just below eye level. The blade should run vertically through the gap without hitting the hardwood. Common mistake: setting the pin too high, which forces you to saw at an angle. Sit at the bench and sight along the blade path before tightening.
- Tighten the C-clamp by hand: Turn the hook-shaped handle until the clamp grips firmly. Do not use pliers or add a cheater bar. Common mistake: over-tightening, which can crush the bench edge or make the pin hard to remove later. Firm hand pressure is enough; the pin should not move when you press down on it.
- Test for movement: Grip the pin and try to rock it side to side and front to back. It should feel solid. Common mistake: skipping this check and discovering a loose pin mid-piercing. Any movement means re-tighten or reposition the clamp.
- Load the work and check blade clearance: Rest a ring or small piece in the V-slot and thread the saw blade through the gap. The work should sit supported on both sides without the blade touching the pin. Common mistake: forcing a large sheet into the V, which lifts the work and makes the cut wander. Use the V-slot for rings and small curves; switch to a flat support for large sheet.
Product facts
- Bench Pin & Metal Clamp, V Slot — 8-Inch Hardwood Sawing Platform for Jewellers: The hardwood pin is clamped to the bench edge with a heavy-gauge steel C-clamp and hook-shaped handle; no permanent fixing is needed. You can move the pin between benches or remove it for other work, and the hardwood body absorbs vibration that would otherwise chatter through the piece.
Bench Pin & Metal Clamp, V Slot — 8-Inch Hardwood Sawing Platform for Jewellers
