Application

• For radial bearings (deep groove ball bearings, angular contact ball bearings, cylindrical roller bearings, tapered roller bearings and spherical roller bearings). Since the number of rolling elements is not standardized, the same bearing size from different manufacturers may require different collets. So when ordering an extractor the bearing manufacturer should always be indicated.
• Bearings with a tightly fitted inner or outer ring
• For applications where the inner ring is adjacent to a shaft shoulder without extraction slots; also applications where the bearing to be extracted from the shaft is still inside a housing.
• If handled correctly, the bearings can be extracted without getting damaged.

Operation

The special extractor consists of a basic unit and a collet which is screwed onto the upper part of the basic unit. The collet is closed via the left-hand thread of the coupling nut and clamped against the inner ring by means of a tapered clamping ring. A threaded spindle generates the extraction force.

The finger-shaped extensions of the collet engage between the rolling elements at the inner ring raceway edge, behind the rollers or behind the chamfer of the bearing ring, wedging it loose. The extraction principle must be observed when selecting the suitable collet for a specific bearing, see page 11. The availability of hydraulically assisted larger extractors will be indicated on inquiry.