TG-OVR_US-EN

THREADING | Solid Carbide and Indexable Thread Mills

XTP TAP TAS HPU APX 4TX REV OPN SSD ACP BTA WHL CRT ALV BRN THM Thread Mill Troubleshooting Guide Causes Causes Catalog Incorrect tool selection Incorrect speed and feed selection Speed and Feed RPM too high RPM too low Machine tool specifications restrict RPMs Feed rate too high Feed rate too low Incorrect adjusted feed rate adjustment ratio Machine tool specification restricts feed rate Ramp-in is programmed as an axial move Tool Thread mill moved or slipped in its holding device Tool is sticking out of the holder too far Runout between thread mill and holder Incorrect coating creating built up edge Helix angle too low Excessive thread mill wear Excessive tool pressure Machine Workpiece moving in its fixturing Insufficient coolant pressure or flow Lack of machine rigidity Programming Incorrect number of passes Incorrect program variables Did not account for X/Y radial moves for tapered threads Incorrect cutter compensation variables Helical interpolation option not on machine or turned off Machine tool control is not formatted to standard EIA/ASCII/ISO Code

Problem

Thread mill is showing accelerated or excessive wear

Cutting edges are chipping

Thread mill is breaking in the first hole of part Thread mill is creating excessive chatter

Out of round thread is produced

Bell-mouthed thread form

(small at bottom, big at top)

Part rejection because of rough flank finish

Steps in thread profile

Gauge difference from part to part

Machine not making correct

paths to create thread profile Control not accepting the program

1

1

2, 3

2, 3

2, 3

2, 3

5

4

4

4

5, 19

7

7

7

7

7

6

12

7, 19

20

20

13

13

13

13

13

13

15

15

15

15

15

15

15

10

10

8, 17

8, 17

9

9

11

11

7, 11, 14

7, 11, 14

16

16

16

16

16

16

17

17

16

16

16

16

16

22

22

18, 26

18, 26

24, 26

23, 26

23, 26

21, 26 21, 26

25, 26

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