ISO 14457 Dentistry — Handpieces and motors , ISO 14457 -Figure 3 Five types of test mandrel
The test mandrel shall have the dimensions shown in Figure 3.
The shape of the shank end for all types of test mandrels shall be either conical or rounded at the discretion of the manufacturer or test house to avoid damaging of the chuck system.
The mandrel cylindricity shall not exceed a value of 2,5 µm and its hardness shall exhibit a value of at least 610 HV5.
Test in accordance with 7.12.
Dimensions without tolerances in Figure 3 shall be in accordance with ISO 2768-1 and ISO 2768-2.
a) Test mandrel Type 1
b) Test mandrel Type 2
c) Test mandrel Type 3
d) Test mandrel Type 4
e) Test mandrel Type 5