Sigma - J-Pro - 46° miter tool for 5/8"-11 angle grinder with 115 mm blade

The Sigma J-Pro is a miter-cutting tool (jolly) that mounts on your angle grinder. It comes preset at 46°, the geometry that gives a clean miter and leaves the ideal gap for the sealant joint: all you choose is the distance from the blade to the tile edge, and you are ready to cut.

It slides along the edge of the tile and follows its natural curves, for a uniform cut along the whole edge, even on a large, slightly irregular slab. At 3.8 kg, it is easy to carry from job to job. This version has a universal 5/8"-11 UNC attachment, the standard grinder thread in Canada, and comes with a 115 mm diamond blade (grinder not included).

Key features

• Fixed 46° miter: no angle to set, only the blade-to-edge distance (X).
• A single pass on tile 5 to 20 mm thick (25 mm with a 125 mm blade), from 30 cm long to any length.
• Universal 5/8"-11 UNC attachment, the version made for Canada and the United States, for 700 to 1,400 W angle grinders. For a grinder with an M14 spindle, choose the M14 J-Pro.
• Wide sliding base: stable, and it glides without scratching the tile.
• Small pieces and baseboards: the J-Pro fixes upright on a bench with no extra accessory, and attaches quickly to the Sigma workbench.
• Dry or wet: dust-extraction port for dry work, or Sigma's Waterkit mist system for wet cutting (a cordless grinder is then mandatory).

Compatible blades

• 115 mm dual-function diamond blade (1.7 mm): tile 6 to 20 mm.
• 115 mm turbo diamond blade: tile 7 to 20 mm.
• 115 mm precision diamond blade (1.1 mm): thin tile, up to 6 mm.

Also need rounded edges or an adjustable miter angle? The Jolly Edge cuts from 40° to 50° and shapes half-bullnose edges. Our guide to Sigma miter and bevel tools compares the tools.