
Partial Profi le Full Profi le Multi-Tooth Profi le
| Tooth profi le with universal | Tooth profi le with full profi le shape | Multi-tooth full profi le |
| profi le shape: | including tooth height: | generally with 2–3 teeth: |
for the tooth tapers. pitch. fewer passes and longer tool life.
1.25 x E as per indexable insert
Metric Formula to fi nd given
D (mm) m/min RPM
D (mm) RPM m/min
m/min =
RPM =
formula m/min = metres per minute
/ x D RPM = revolutions per minute
x RPM D = part diameter 1000 / = 3.1416 m/min x 1000
D x /
a = arctan (sin`/2) * tan(_)) On older machines, cutting speed is often limited by the maximum a = side (fl ank) clearance
| travel speed mm/min of the tool allowed by the machine. | ` | = | included angle of thread form |
| Check your maximum speed with the following formulas: | _ | = | radial inclination angle |
metric formula: maximum cutting speed (m/min) =
| Thread | Angle | External | Internal | |
| part diameter (mm) x 3.14 x (1/pitch) x max mm/min | ||||
| 1000mm | UN & ISO | 60 | 5.3 | 8 |
| BSW | 55 | 4.8 | 7.3 | |
| TR | 30 | 2.6 | 4 | |
| ACME | 29 | 2.6 | 3.9 | |
| AMBUT | 7 | .6 | .9 | |
| AMBUT | 45 | 4 | 6 |
LWID_Master16_Turning_Threading_F086_F087_Metric_REBRAND.indd 86ViWID M16 TiThdiF086 F087 M i REBRAND N b 11 2015 8 24 AM 11/11/15 9:29 AM