CoroThread® 266
Highly rigid external and internal thread turning
Insert clearance angles
Flank clearance or radial clearance are necessary for precise, accurate thread turning.
Learn more
Threading application guide
Download the Threading application guide loaded with information about thread turning.
Go to guide
Coolant connection on QS shanks
There are three ways to connect the coolant: using an adapter (First choice), using the rear tube connection or with the rear tube connection with a QS stop.
Application tips
Troubleshooting
There are many types of insert wear. By paying close attention to the cutting edge after machining, tool life and thread quality can be further optimized.
How to achieve good thread quality
Use these helpful tips to succeed in your thread turning operations.
Recommendations
Find the right shim
Use this table to find the suitable shim for your CoroThread® 266 tool holder depending on pitch, insert size and inclination angle.
| Pitch range | Insert size | Inclination angle, λ | Shims | ||
| mm (TPI) | mm | inch | For right-hand external tool / For left-hand internal tool | For left-hand external tool / For right-hand internal tool | |
| 0.5-3.0 (32-6) | 16 | 3/8 | -2o | 5322 389-22 | 5322 390-22 |
| -1o | 5322 389-21 | 5322 390-21 | |||
| 0o | 5322 389-10 | 5322 390-10 | |||
| 1o | 5322 389-111) | 5322 390-111) | |||
| 2o | 5322 389-12 | 5322 390-12 | |||
| 3o | 5322 389-13 | 5322 390-13 | |||
| 4o | 5322 389-14 | 5322 390-14 | |||
| 2.5-7.0 (11.5-4) | 22 | 1/2 | -2o | 5322 379-22 | 5322 380-22 |
| -1o | 5322 379-21 | 5322 380-21 | |||
| 0o | 5322 379-10 | 5322 380-10 | |||
| 1o | 5322 379-111) | 5322 380-111) | |||
| 2o | 5322 379-12 | 5322 380-12 | |||
| 3o | 5322 379-13 | 5322 380-13 | |||
| 4o | 5322 379-14 | 5322 380-14 | |||
| 8.0 (5-3) | 27 | 5/8 | 0o | 5322 387-10 | 5322 388-10 |
| 1o | 5322 387-111) | 5322 388-111) | |||
| 2o | 5322 387-12 | 5322 388-12 | |||
| 3o | 5322 387-13 | 5322 388-13 | |||
| 4o | 5322 387-14 | 5322 388-14 | |||
| Pitch range | Insert size | Inclination angle | Shims for holders 266R/LFA | ||
| mm | mm | inch | For right-hand external tool | For left-hand external tool | |
| 0.5-3.0 | 16 | 3/8 | -2o | 5322 391-22 | 5322 392-22 |
| -1o | 5322 391-21 | 5322 392-21 | |||
| 0o | 5322 391-10 | 5322 392-10 | |||
| 1o | 5322 391-111) | 5322 392-111) | |||
| 2o | 5322 391-12 | 5322 392-12 | |||
| 3o | 5322 391-13 | 5322 392-13 | |||
| 4o | 5322 391-14 | 5322 392-14 | |||
| 2.5-7.0 (11.5-4) | 22 | 1/2 | 0o | 5322 393-10 | 5322 394-10 |
| 1o | 5322 393-111) | 5322 394-111) | |||
| 2o | 5322 393-12 | 5322 394-12 | |||
| 3o | 5322 393-13 | 5322 394-13 | |||
| 4o | 5322 393-14 | 5322 394-14 | |||
1) Delivered with the tool
Note: The last two figures in the shim code indicate + or – and the effective inclination angle with the shim mounted in the holder, e.g. 5322 379-11 = angle +1o and 5322 379-21 = angle -1o.
On our Knowledge section, you will find more information about how to choose thread turning inserts and shims.
Cutting data
For information about cutting data, see the Turning Tools catalog.
Insert geometry
| ISO | MC number | CMC number | Geometries | ||
| A | F | C | |||
| P | P1.1.Z.AN | 01.1 |
|
|
|
| P2.1.Z.AN | 02.1 |
|
|
| |
| P2.5.Z.HT | 02.2 |
|
|
| |
| P3.1.Z.HT | 03.21 | ||||
| M | M5.0.Z.AN | 05.11 |
|
|
|
| M1.0.Z.AQ | 05.21 |
|
|
| |
| M3.1.Z.AQ | 05.51 |
|
|
| |
| K | K1.1.C.NS | 07.2 |
|
| |
| K2.2.C.UT | 08.2 |
|
| ||
| K3.1.C.UT | 09.1 |
|
| ||
| N | N1.2.Z.UT | 30.11 |
|
|
|
| N3.2.C.UT | 33.2 |
|
|
| |
| S | S1.0.U.AN | 20.11 |
|
| |
| S2.0.Z.AG | 20.22 |
|
| ||
| S4.2.Z.AN | 23.21 |
|
| ||
For ISO H, use CBN insert CB7015
= First choice
= Second choice
= Alternative choice
Grades
Create account chevron_right
Place orders, view prices and check tool availability
Subscribe to our newsletter chevron_right
Join us. Stay updated.
