Technical Information

Technical Information
Technical Information
KM Application Data
Operating Conditions
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, Kennametal 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.
Example of Calculation:
Where: P = rated tangential load
K = empirical coefficient depending on
KM system size and the units of measure
P =
KM32 K=190200
KM40 K=383600
KM50 K=887400
KM63 K=1718000
KM80 K=3085800
K
(0.8 L1) 2 + F 2
Chart 1 F and L1 Dimensions (mm) vs. Tangential Loads (N)
for KM32TS
120
Given: The KM integral shank boring bar, ordering code
KM40TS S32G-MCLNR12
Dimensions: L1 = 90mm (3.543")
F = 22mm (0.866")
Required: What is maximum permissible tangential load?
M38 www.kennametal.com
F
(mm)
P =
100
80
60
40
20
4000
4700
5400
0
0 20 40 60 80 100 120 140
383600
L1 (mm)
Example
IMPORTANT
Information shown on the following charts was developed exclusively for use with KM tooling in static conditions. Do not use for any other tooling
system because the results will not apply. To account for cutting force fluctuations in dynamic conditions, a reduction of 20–30% should be applied
to the loads shown in charts.
3400
2700
(0.8 x 90) 2 + 22 2
2400
2000
1700
= 5095 N
(continued)