# US 7,611,310 B2 · Thread cutting insert

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- Number: US 7,611,310 B2
- Document ID: US7611310B2
- Status: Granted
- Kind: B2
- Application number: 11/414,561
- Filed: 2006-05-01
- Published: 2006-11-23
- Granted: 2009-11-03
- Earliest claimed: 2005-05-02
- Assignees: Sandvik Intellectual Property AB
- Inventors: Robert Isaksson
- Web page: https://patentgrep.com/patent/US7611310B2

## CPC

- B23B 27/10: Cutting tools with special provision for cooling {(drills with lubricating or cooling equipment B23B51/06; features relating to lubricating or cooling of milling cutters B23C5/28; arrangements or devices for cooling or lubricating tools or work B23Q11/10)}
- B23B 27/065: {Thread-turning tools}
- B23B 27/145: {characterised by having a special shape}
- B23B 2200/165: with one or more grooves
- Y10T 407/14: with means to apply fluid to cutting tool
- Y10T 407/23: including tool having plural alternatively usable cutting edges
- B23B: TURNING; BORING (arrangements for copying or controlling B23Q)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A thread-cutting insert includes opposite top and bottom sides as well as front and back sides, the front one of which is formed with a plurality of laterally spaced-apart teeth, which separately have a chip-removing edge in a transition between a clearance surface and a top surface of the individual tooth, one the of the teeth, viz. a final-shaping tooth, having a contour shape that gives the desired profile shape of the thread that is to be generated. At least one downwardly open duct is formed in the bottom side of the cutting insert, which duct extends up to the final-shaping tooth and ends adjacent to the same. Advantageously, such ducts are formed for all teeth.

## Claims

### Claim 1

A thread-cutting insert, comprising:
opposite top and bottom sides and front and rear sides, the front side of which is formed with a plurality of laterally spaced-apart teeth, which each have a chip-removing edge in a transition between a clearance surface and a top surface of an individual tooth;
one of the teeth being a final-shaping tooth having a contour shape that gives the desired profile shape of the thread that is to be generated;
wherein at least one downwardly open duct is formed in the bottom side of the cutting insert, which duct extends up to and intersects with an outermost part of a tip of the final-shaping tooth and ends therein.

### Claim 2 (depends on 1)

The thread-cutting insert according to claim 1, wherein the duct extends up to the plurality of teeth.

### Claim 3 (depends on 2)

The thread-cutting insert according to claim 2, wherein the duct extends inward from the appurtenant tooth up to the rear side of the cutting insert in which it mouths.

### Claim 4 (depends on 3)

The thread-cutting insert according to claim 3, wherein the duct transforms into an inlet duct, which opens in the rear side of the cutting insert.

### Claim 5 (depends on 4)

The thread-cutting insert according to claim 4, wherein the inlet duct extends continuously between the bottom and top sides of the cutting insert.

### Claim 6 (depends on 1)

The thread-cutting insert according to claim 1, wherein the duct includes a plurality of branch ducts which communicate with a main duct, and wherein the main duct opens in the bottom side of the cutting insert.

### Claim 7 (depends on 6)

The thread-cutting insert according to claim 6, wherein the main duct is placed in such a way that an end of a hole extending through the cutting insert mouths therein, the opposite end of which hole mouths in the top side of the cutting insert.

### Claim 8 (depends on 1)

The thread-cutting insert according to claim 1, wherein the duct has a uniform depth up to a front gap opening in an appurtenant tooth, which gap widens in the forward direction.

### Claim 9 (depends on 1)

The thread-cutting insert according to claim 1, wherein the duct branches into at least two subducts, which mouth adjacent to opposite flank surfaces of a respective individual tooth.