Technique external thread
Calculation of the helix-angle ß:
Rule of thumb: P x 20 / D = Angle
n = Number of threads
P = division (= pitch with one-start thread)
D = Thread diameter
Thread cutting insert holders standard supplied with 1° insert inclination angle. In Part to achieve the desired helix-angle, appropriate
spacers must be selected
Spacers for 3/8” / ER16 Inserts
Technique 1
| helix-angle ß | 0° | 1° | 2° | 3° | 4,5° |
| spacer | UR16-00M | UR16-01M | UR16-03M | UR16-03M | UR16-45M |
Technique 2
| helix-angle ß | 0° | 1° | 2° | 3° | 4,5° |
| spacer | UR16-00M | UR16-01M | UR16-03M | UR16-03M | UR16-45M |
Technique 3
| helix-angle ß | 0° | 1° | 2° | 3° | |
| spacer | UR16-00M | UR16-01ML | UR16-03ML | UR16-45ML |
Technique 4
| helix-angle ß | 0° | 1° | 2° | 3° | |
| spacer | UR16-00M | UR16-01ML | UR16-03ML | UR16-45ML |
The standard spacers UR16-01M and UL16-01M are each supplied together with the insert holders for threading
Spacers
| Part # / Spacer | Spanner | Part # / Screw | for Holder | |
|---|---|---|---|---|
 | UR/L16-xxM UR/L16-xxML | T10 | calmping screw KS-M3-T10 | SER/L…K..16 |
 | SU-DC11 | T9 | SU-M5-35 | SDAC../SDJC../SDNC.. |
