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Fretsaw & Scroll Saw Blades

A fretsaw blade is neither a jigsaw blade nor a bandsaw blade: it is thin, flat and either pin-end or pinless. It is the only blade that cuts tight internal shapes, because it can be threaded through a drilled hole and re-tensioned. The choice is made on teeth per inch.

Teeth per inch: one number, two consequences

More teeth means a finer, slower cut; fewer means faster and coarser. The practical rule looks at thickness: at least three teeth must be in the material at all times, or the blade snatches and breaks.

Roughly: 10-14 TPI for thick wood and plastic, 17-25 TPI for general plywood and board, 41 TPI for thin veneer, brass and sheet.

Reverse tooth blades and the mounting

A standard blade cuts on the upstroke and leaves splintering on the top face. On a reverse tooth blade the lower teeth cut downward, so the top face stays clean — which is where the difference shows on veneered board.

There are two mountings: pin-end goes in fast but needs a larger pilot hole; pinless passes through a finer hole and turns a tighter radius. The product page says which the machine takes.

Frequently Asked Questions

  • Is it the same as a jigsaw blade?

    No. A jigsaw blade is held at one end and is thick; a fretsaw blade is tensioned at both ends and is far thinner, which is why it turns a far tighter radius.

  • How is an internal cut made?

    Drill a hole inside the waste, thread the blade through it and re-tension; when the cut is finished, release the blade and lift it out. Pinless blades need a smaller hole for this.

  • Can it cut metal?

    Brass, copper, aluminium and thin sheet with a fine tooth blade. Slow the cut down and expect the blade to dull faster; plan consumption accordingly.

  • What pack size do they come in?

    Fretsaw blades are usually sold in packs of 12; the pack quantity is in the spec table on the product page.