8 Pitch Thread Mills

Carbide Tipped Thread Mills

TOSCO Carbide Tipped Thread Mills features a hardened steel body with brazed carbide tips. The same high quality, micro grain HIP tungsten carbide materials is used for these tools to insure the same performance found in the TOSCO Solid Carbide Thread Milling Cutters. Coolant holes into the flutes are provided for chip evacuation and cooler operating temperatures. Use of this configuration allows economical fabrication of large sized thread mills as well as special designs. The overall length can easily be shortened to reduce overhang when required. Carbide Tipped Thread Mills are stocked uncoated. Coatings available upon request. As with all TOSCO tools this series of thread mills can be sharpened or refurbished as required.

A classification system exists for ease of manufacture and interchangeability of fabricated threaded items. Most (but certainly not all) threaded items are made to a classification standard called the Unified Screw Thread Standard Series. This system is analogous to the fits used with assembled parts.

Classes 1A, 2A, 3A apply to external threads; Classes 1B, 2B, 3B apply to internal threads.

Class 1 threads are loosely fitting threads intended for ease of assembly or use in a dirty environment.

Class 2 threads are the most common. They are designed to maximize strength considering typical machine shop capability and machine practice.

Class 3 threads are used for closer tolerances.

For more information see: http://en.wikipedia.org/wiki/Unified_Thread_Standard

Click Tool Number for volume pricing and online ordering information

Tool	Price	Availability
.750-8	$332.0	In Stock
1.000-8	$386.0	In Stock
1.500-8	$504.0	In Stock

We manufacture our thread mills for both Internal & External threads of ALL classes

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STANDARD SPECIFICATIONS

UNJ	MIL S 7742	MIL S 8879
UNJF 3B	UNJ 3A	UNJ 3B
UNF 3B	UN 3B

ROOT RADIUS MODIFICATION

PITCH	UNJ RAD	MIN ROOT RAD ON TOSCO FLAT
8	.0188 .0226	.0112

On OD’S .750 thru 1.00 add $100 EA, for OD 1.500 add $129 EA. If size doesn’t fit the MIN, tool must be specially reground. Please feel free to contact us for more information.