
The KM tooling joint is an extremely rigid and stable system that is specifically designed to supply consistent results. As with any mechanical coupling, KM has limits that, if exceeded, could result in mechanical damage to the joint and/or its components. To help you stay within these limits, WIDIA™ has established maximum safe tangential loads for each system size. These loads are described as a certain amount of force at the standard “F” and “L1” dimensions for each given system size.
IMPORTANT Information shown on the following charts was developed exclusively for use with KM tooling. Do not use for any other tooling system because the results will not apply.
Chart 1 F and L1 Dimensions (mm) vs. Tangential Loads (N) for KM32TS 120 100 80 1700 2000 60 2400 F 2700 (mm) 3400 40 4000 4700 5400 20
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0 20 40 60 80 100 120 140
L1 (mm) Example
Example of Calculation:
| Where: | P = rated tangential load | Given: | The KM integral shank boring bar, ordering code |
| KM40TS S32G-MCLNR12 | |||
| K = empirical coefficient depending on |
| KM system size and the units of measure | Dimensions: | L1 = 90mm (3.543") | |
| F = 22mm (0.866") | |||
| KM32™ | K=190200 | Required: | What is maximum permissible tangential load? |
| KM40™ | K=383600 | ||
| KM50™ | K=887400 | ||
| KM63™ | K=1718000 | ||
| KM80™ | K=3085800 | ||
| K | 383600 |
P = P = = 5095 N
(0.8 L1)2 + F2 (0.8 x 90) 2 + 222