Thread Formers for Cold Forming Internal Threads without Chips

GFU Druck-S

Chamfer. S Type is 2-3 threads long with length according to DIN shape C.

Geometry. Designed for cold forming internal threads without chips when machining ductile metals with good plastic flow.

Machining. Accurate threads to size with clean flanks can be produced provided the following conditions are met:

1. Comply with optimal core hole diameter. Each irregularity in the production the core hole affects the core diameter of cold-forming threads. Refer to the standards for DIN 13, section 50.
2. Optimal lubrication with sufficient quantity and high quality are required. Compression-proof additives added to the lubricant prevent friction welding and reduce sliding friction considerably. Thread formers can be supplied with oil grooves to improve coolant and lubrication flow especially for horizontal operations.

Generally, cold forming taps have a larger thread size due to the so-called X-tolerance.

GFU Druck-PM-TIN

Machining. This new type of cold forming tap was designed in order to extend the conventional application range, especially in the field of high-performance components with a tensile strength of up to Rm = 1200 N/mm2 or 38 Rc, and to guarantee more process safety at 360 HB/370 HV.

GFU Druck-Z-OLN-TIN-T1

Chamfer. Form "C" 2-3 Threads

Application. "Z" Geometry designed especially for CNC controlled machines.

Materials.

1. Structural and free cutting steels and heat treated steel within tensile strength ranges from 58000 to 116000 PSI (119 BHN-22HRc) used in conjunction with good quality emulsions with a mixture ratio of approximately 1:12 up to 1:15.
2. For stainless and acid resistant steels. Recommended for use with cutting oils or special emulsions with compression-proof additives of good quality.
3. For forged parts, heat-treated materials, tool steels, steel castings, and high alloy steel castings.
4. Almost all aluminum alloys can be worded with our tap "Z" without having to change rake angle or chamfer. Emulsions with a mixture of 1:12 up to 1:15 are sufficient as coolant and lubricant.
5. For working nickel, nickel alloys and some titanium alloys. The use of cutting oil or pastes of high quality is required.

Coating. TiN-T1 for better thread surface finishes, higher cutting speeds and longer tool life.