External-Extracting

Aussen Abziehen

Principle

External extraction is the most common type of pulling. The part to be extracted such as a gear wheel, pulley or ball bearing, is gripped from the outside. The part is loosened from the shaft by tightening the spindle.

Standard external extracting

External extracting with additional extended jaws

External extracting using a puller with side clamp

Notes on outside pulling


The pulling jaws of the arms must be set firmly and completely against the cross-beam

The puller must be positioned centrally for center shafts. If the shaft is not centered, pulling with parallel jaws may result in offset movements or disengagement

If several parts have to be removed, always follow a step-by-step process. Never remove several parts simultaneously

Pulling jaws must always be positioned directly below the part to be removed

If there is adequate free space around the part, we recommend a 3-jaw puller for optimal force distribution

Many of the internal extractors in the 21 series (not 21-E) can be expanded using an extension (series 21-V) for extracting parts set deep inside a bushing.

Outside pullers as internal extractors

In addition to their use as outside pullers, our series 11, 20, 30, 110, 120, 130, 201, 202 and 203 pullers can be also be used as internal extractors by rotating the pulling jaws.

Important: When used as internal extractors, a fixed center point is required to brace the pressure spindle of the products in these series.

Side clamps


An additional side clamp can be attached for 2-jaw pullers with very long or extended pulling jaws

The side clamp (Item no.: 219-1) is available separately

It is attached to the puller arm after the puller has been fitted and prevents slippage of the pulling jaws under very high forces.

The KUKKO line also features many pullers with the side clamps already integrated. With some pullers, such as Series 210 Cobra, the side clamp can also be used for separating

Modular extensions

For the 20 and 30 series, we offer modular extensions. If the part to be removed sits, for example, deep inside a shaft, pulling jaws will be needed.

Hydraulic external pulling

When pulling with mechanical spindles, extremely high drive force from a torque or screw wrench is usually needed.

By replacing the mechanical spindle with a hydraulic spindle, the drive force applied is considerably reduced. Damage to the spindle thread is also prevented.

The mechanical spindle may not be exchanged when pulling with a mechanical pressure screw and hydraulic extra press.

Safety information

Carry out regular checks of the condition of the tool and replace damaged or worn parts.
Halten Sie die Gewinde von Spindeln und Traversen stets rein und immer gut geölt.
Before use, make sure you know how to properly operate the pulling tool, in compliance with the necessary safety precautions.
If you are even slightly uncertain about one of the points mentioned above, you should request clarification on tool operation.
Make sure the pulling tool is in perfect condition before use.
Verify that the tool is attached correctly and monitor the force used during the removal process.
Never exceed the stated load values for the tool, and check the application of the pulling force by using a torque wrench for mechanical pulling tools and a pressure gauge for pump-operated hydraulic pulling tools.
Wear suitable personal protective clothing. Always wear protective goggles.
Protect yourself with a protective blanket against jerky movements that are always possible with pulling tools and the part being pulled when doing extraction jobs.
Should overload, stiffness, etc., occur, stop the removal process and use a larger version of the corresponding series to complete the job.
Do not use any electrical or pneumatic servo screwdrivers or impact screwdrivers to operate pulling tools.
Do not use extensions to increase the transmitted torque.
Do not make any modifications to the products.
Because the strength properties of steel change under the influence of heat, pulling tools may not be heated when the parts to be pulled are heated.
 

About KUKKO

For almost 100 years, we have produced pulling tools for users in craft trades and industry. We are an independent, owner-operated family company, now in the fourth generation, with above-average returns, at 100% equity financing and are one of the leading producers of pulling tools of all kinds.

©2018 Kleinbongartz und Kaiser oHG. All rights reserved. Unauthorized copying or distribution without written permission is strictly prohibited. KUKKO and WILBÄR are registered trademarks of Kleinbongartz & Kaiser oHG in Germany and other countries. TURNUS and WINKELGREIF are registered trademarks of Eduard Gottfried Ferne GmbH & Co. KG in Germany and other countries.

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