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Turning tools \ Technical introduction - knurling

Procedures and process parameters, knurl cutting
Key steps

1. Tool setting - tip height
2. Align knurling wheels: Wheel must taper slightly on the spindle-side edge (approx. 1/3 of the wheel width)
3. Clearance angle: 1° - max. 3°
4. Infeed depth = pitch (for example 1 mm partition requires 1 mm infeed in Ø)
5. Knurling depth only suffi ciently deep to produce sharp knurl

6. A er a dwell time of 3-10 rotations, the workpiece is knurled under longitudinal feed
Correct imprint: Incorrect imprint: Incorrect imprint:
approx. 1/3 knurling width Complete knurling width Knurling would “press”

1 1 1

① Cutting direction ① Cutting direction ① Cutting direction

Reference values for process parameters

Material * Workpiece diameter Speed n Radial feed f Axial feed f Infeed depth
*
(mm) (rpm) * (mm/r) * (mm/r) * (mm)
Up to a maximum of RM = 1000 10 1000 0.08-0.1 0.1-0.15 p = Ø
N/mm 2
Up to a maximum of RM = 1000 50 500 0.08-0.1 0.1-0.15 p = Ø
N/mm 2
Up to a maximum of RM = 1000 100 300 0.08-0.1 0.1-0.15 p = Ø
N/mm 2
Note: The specified values (initial values) are recommendations and must be optimized in the application.

* The professional quality as well as the wear of the knurling wheels depend on:
- The combination of workpiece diameter and speed
- The feed
- The material
- The application (e.g. clamping situation - one- or two-sided)
Form knurling tool with one knurl (RD1 series, model 131)
For form knurling on lathes and turning machines

Source: Hahn+Kolb Werkzeuge GmbH
Technical data subject to change. www.iconridge.com
Availability subject to country specific rules and regulations. 326

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