The number varies with the pitch of the thread and by the machinability of the material. When a mating part must be seated against a shoulder or hole bottom, a thread relief (recess or undercut) should be shown on the part. This provides clearance for the threading tools. This is shown in Figures 3 and 4.

Thread Relief Cutters are designed to relieve stress concentrations at the corners of undercuts, and at the bottom of the last thread, to prevent fracture and failure. This tool is typically used before a threading operation to avoid damaging the thread form.

Thread Relief and Chamfers Threads and Burrs . OTHER PROCESSES. Heat Treatment Plating . SYMBOLS . REFERENCES AND SOURCES OF INFORMATION . DESIGN AND ENGINEERING AIDS. You can modify this structure using our intuitive drag and drop interface, which allows you to rearrange content to your heart’s content.

Features: Thread Relief Tools Solid micrograin carbide ; For producing a thread relif to keep your threading tools from breaking.

Figure 1 illustrates how an undercut or a recess between a thread and a shoulder will enable seating securely with a mating piece. Undercuts in these examples are usually two to three threads wide and below the depth of the thread minor diameter. Undercuts are properly used at the junction of bodies of different diameters which are to be ground.

Thread Mills. Mill any pitch – inch or metric – with our impressive selection of Thread Mill Cutters. Available in Single Form, Multi-Form, Tri-Form, and Thread Relief. Many of these tools mill right hand and left hand threads and can cut internal and external 60° UN threads in many materials, including hardened steels.

tool # min bore tip width max depth offset angle per side shank dia overall length 1 pc 2-10 11-25 26-100; 46-1140: 0.3750: 0.1300

Designed for combined drilling, threading, thread relief cutting, and chamfering, this unique Harvey Tool product performs four different operations, saving machinists time by minimizing tool changes while preserving valuable room in their tool carousel. Designed for combined drilling, threading, thread relief cutting, and chamfering

Thread Relief Selection Guide - Metric Threads. Thread Fit Chart - Single Form - UN Threads. Thread Fit ...

This metric offering of Thread Milling Cutters - Single Form features tools intended to cut internal and external, right hand. . . Thread Milling Cutters-Single Form-UN Threads Harvey Tool Thread Milling Cutters - Single Form - UN Threads can mill multiple pitches, and …