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product-3Impact Fitting Tool BFT 36 for cold mounting of rolling bearings

Most premature bearing failures may be attributed to poor workshop practices when the bearing was fitted.

Misalignment, damage to the surrounding structure (shaft or housing), applying force so that it gets transmitted from one ring through the rolling elements to the ring being fitted, use of the wrong tools, dirty conditions leading to contamination inside the bearing and a multitude of other causes can lead directly to premature bearing failure.

About cold mounting

Small bearings with a bore diameter up to 55 mm (or outside diameter up to 100 mm) can be cold mounted onto the shaft or into the housing for normal interference fits.
Before proceeding, the shaft should be examined for imperfections or burrs and these removed. The bearing should be positioned exactly at right angles to the shaft, and the shaft should be lightly lubricated with thin oil.

To prevent bearing damage, force must always be applied to the ring being fitted; that is to say:

Usually a mandril is used to fit a bearing, either on the shaft or in the housing, by striking it with a soft hammer. It is vitally important that the correct mounting tools are used, otherwise the bearing may easily be destroyed before the machine is even switched on.

About Bearing Fitting Tool BFT 33
Application

The ZVELCO Bearing Fitting Tool BFT 33 is designed for safe, precise and quick cold mounting of bearings with bore diameter from 10 to 50 mm and for other parts such as coupling hubs and gears. The right combination of impact ring (mandril) and sleeve allows effective transmission of mounting force to the bearing ring with the shaft or housing interference fit, minimising the risk of damage to the raceways or rolling elements.

Description
The fitting tool set consists of a soft hammer, 3 impact sleeves and 33 different impact rings packed in a carrying case.

 cold-2Most bearings are fitted either on the shaft or housing with an interference fit; in some cases both shaft and housing have an interference fit.
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Incorrect mounting:
Mounting force should never go through the rolling elements
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Correct mounting: Mounting force must always be applied to the ring being mounted with an interference fit

Technical data

DesignationBFT 33
DescriptionFitting tool kit
Impact ringsBore diameter: 10 – 55 mm
Outer diameter: 26 – 120 mm
SleevesBore diameter: 18,5, 37,5, 57,5 mm
Outer diameter: 25, 45 and 66 mm
Hammerweight 1 kg
Dimensions of the case525 × 420 × 130 mm
Number of rings36
Number of sleeves3
Kit weight, Incl. carrying case4 kg
Case dimensions:440 x 350 x 95 mm

 

ZVELCO BFT 33 selection table

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