Bearing Puller guide: choose right puller for your work
DNT pullers are manufactured to a very high specification and subjected to rigorous testing - far exceeding their stated capacities. The legs and beams are drop forged from high quality steel and then heat treated for extra strength and durability. Pullers are normally classified as either hydraulic or mechanical with many different types within these two styles
Choosing the right puller for the job
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Decide what ‘spread’ is
required. This is
determined by the width of
the part to be pulled. |
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Estimate out what ‘force’ is required.
More force may be required for rusted
parts or where there is a large area of
surface contact. Hydraulic pullers
enable maximum force to be applied
with minimum effort. Alternatively,
choose a puller whose force screw
diameter is at least half the size of the
shaft of the item to be removed. If in
doubt, use the next largest - using an
undersized puller will slow down the job
and lead to frustration
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Always use a 3 leg puller if possible. This gives a better load distribution and is much safer in use. |
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Decide what ‘reach’ is
required. This must be at
least equal to or larger than
the depth of the part which
needs removal. |
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Types of Puller
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These have a simple, grease-filled ram instead of a mechanical force screw, producing extra power with ease. The spring loaded plunger provides direct, non twisting application of thrust which is more effective and more secure. |
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Blind Housing Bearing Removers
These operate without the need to
dismantle machinery or remove the
running shaft. |
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Loadstar Hydraulic Pullers
Various styles available; Loadstar
8, 12 & 20 Tonne and Loadstar ‘Plus’
20, 30 & 50 Tonne. For heavy duty
pulling and extracting. |
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Separators
For where all round support is required
or where there is insufficient space for
standard puller legs |
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Mechanical Pullers
These use a mechanical force screw |
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Slide Hammers
Used when there is no shaft, making
a conventional puller unsuitable. |
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Thin Jaw Pullers
These have special legs for use where
clearance is limited behind the gear or
bearing race.
Available in both hydraulic and
mechanical. |
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Split Collet Extractors
For blind housing internal use. The split
collet is pushed into the centre of the
bearing and then expanded via the hex
nut on the end of the collet. |
Quick Reference Guide
