Solid Carbide BSP G and BSPT Rc Pipe Thread Mills for Straight and Taper Threads

It is a solid carbide CNC tool with multiple precision-ground teeth that generate the complete 55° British Standard Pipe thread profile by helical interpolation. The BSP G series produces straight or parallel internal threads, while the BSPT Rc series produces internal taper threads with a 1:16 taper. Each tool is size-specific and must be selected according to the thread designation, nominal size, TPI, required thread length and inspection method.

BSP G is a 55° parallel pipe thread with a constant diameter, whereas BSPT Rc is a 55° internal taper pipe thread with a 1:16 taper. Although corresponding nominal sizes may share the same TPI, their geometry and programmed toolpaths are different. Do not use them interchangeably; select the dedicated BSP or BSPT tool code shown in the appropriate size table.

First confirm whether the drawing specifies G parallel or Rc internal taper. Then match the nominal size and its required 28, 19, 14 or 11 TPI. Select a model whose cutter diameter d1 clears the prepared pilot hole and whose cutting length L1 covers the required thread engagement. Use the shortest suitable reach for rigidity, and confirm shank diameter D, overall length L, holder access and bottom clearance before programming.

Yes, provided the pilot hole is deep enough for the cutting length, entry movement and required bottom clearance. For BSP G, use a constant-diameter helical path; for BSPT Rc, program the required 1:16 taper into the helical path. Confirm usable hole depth, thread engagement, chip evacuation, coolant access and safe retract clearance before selecting L1.

The standard series is primarily suited to carbon steel, alloy steel, prehardened steel, cast iron, stainless steel and titanium, with suitable configurations also available for aluminum, copper and selected high-temperature alloys. Carbide grade, coating and starting cutting data should be matched to the material, hardness, nominal pipe size, TPI, thread engagement, tool overhang and machine rigidity.

Use the correct gauge for the thread specified on the drawing: a matching G gauge for parallel threads or an Rc gauge for internal taper threads. Inspect the first machined part for gauge position, effective thread length and thread condition, then apply small CNC compensation adjustments if necessary. Visual inspection alone is not sufficient, and a G gauge must not be substituted for an Rc inspection requirement.

Both dedicated ranges cover 1/16, 1/8, 1/4, 3/8, 1/2, 3/4 and 1 inch nominal sizes with 28, 19, 14 and 11 TPI. BSP G models use Ø6–Ø20 mm cutter diameters and 14–42 mm cutting lengths. BSPT Rc models use Ø5.3–Ø17.38 mm cutter diameters and 9.9–42 mm cutting lengths. Shanks are Ø6–Ø20 mm, overall lengths are 60, 75 or 100 mm, and four- or five-flute options are supplied according to tool size.

Yes. Custom nominal sizes, TPI, cutter diameter d1, cutting length L1, shank diameter D, overall length L, flute configuration, carbide grade, edge preparation and coating can be reviewed. Please provide the complete G or Rc thread callout, component drawing, gauge requirement, engagement length, pilot-bore information, workpiece material, machine conditions and order quantity.

Yes. Laser marking can include the customer logo, G or Rc designation, nominal pipe size, TPI, tool code and batch number. Custom coatings, labels, protective tubes and private-label packaging can also be reviewed for distributor and OEM programs.

In-stock standard BSP G/BSPT Rc models can normally be prepared for shipment within 1–3 working days. Custom tools require confirmation of the thread designation, nominal size, TPI, drawing, gauge requirement, dimensions, carbide grade, coating, quantity and packaging before the production lead time is confirmed.