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Shown above, internal gear and bearing pullers come in a various range of sizes and designs.

Back to the Basics

internal Pullers

What are Internal Pullers?Internal gear and bearing pullers are simple tools that are designed for dismounting press fit items through the center of the part to be pulled. They have specially designed jaws for inside pulling jobs such as crankshaft pilot bearings, bearing cups, needle bearings, bushings, seals, grease retainers, gimble bearings and rear-axle bearings.

Internal pullers often feature a slide rod and sliding hammer to help facilitate the removal of bearings. These unique features help the technician generate the maximum amount of force without the need for additional tools.

Internal pullers provide a straight pull and help avoid unnecessary damage to the component being pulled. They are ideal for removing parts where there are no housings for external pullers to grip and are a must have for most types of engine and wheel repairs.

*Posi Lock Puller Inc. is the only manufacturer that has a patented Safety Cage® design.

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hoW to use an Internal Puller?

Jaws (2-or3-jaw options) Cross Arm/ Cross BarSlide Rod & Hammer

Although there are many applications, the process for proper gear and bearing removal with an internal puller is simular. Below are instructions on how to use a Posi Lock internal puller.

Adjust and fit the pullerFit the puller by inserting the jaws through the center of the component to be pulled. Take extra precaution to make sure the jaws fit tight against the inside of the housing. Turn the t-handle of the puller to lock the jaws firmly inside the component.

What are the comPonents? Internal gear and bearing pullers gener-ally consist of these basic parts:

Remove the partStart with the sliding hammer in a rest position at the bottom of the slide rod. Pull the sliding ham-mer to the top of the slide rod until it rams against the handle. This action generates the maximum amount of force that is needed to move the component. Repeat until the component is completely removed.

Patented Safety Cage® T-handleJaw head assembly (simular to the cross arm) 3-Jaws Slide Rod & Hammer

Posi Lock Puller internal gear and bearing pullers have a patented design that consist of:

Select the proper pullerExamine the part to be pulled and select the proper size puller for the application.

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selectIng an Internal Puller

When choosing the proper puller for a specific application, several points must be considered:

Puller ReachPuller reach is the available distance between the pulling surface of the jaw and the jaw head of the puller. This distance varies and decreases as jaws are opened. When choosing a puller make certain the reach is sufficient to attach the puller.

Puller SpreadPuller spread is the maximum distance that the jaws can open. In choosing the proper pull-er make certain the puller has a large enough spread to attach to the object being removed.

ForceForce varies between each user when using an internal puller. The stronger the technician, the more force they can exert. It is impossible to predict the exact force needed for every pulling situation. The amount of press fit and force of removal can vary greatly between jobs. The setup requirements along with the size, shape, and condition of the parts being pulled are variables which must be considered.

Safety | OPERATOR SAFETY COMES FIRST! Study each pulling application before you select a puller. A significant amount of force can be exerted with a puller. Respect theses forces and always observe safety precautions:

a. Always select the proper puller for each pulling job. A puller equal to or larger than required.b. Inspect the puller before each use. Replace any worn or damaged parts with authorized parts.c. Always wear safety goggles when using pullers.d. Always use hand tools with mechanical pullers.e. Never apply heat or alter the puller by welding, cutting, or grinding.f. Support the puller and object being pulled.

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EPMI6 Internal Puller

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AA. ReachB. SpreadC. LengthD. Slide RodE. Jaw

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target markets

Small repair jobs can be frustrating and time consuming without the proper tools. Internal gear and bearing pullers are a must have for applications such as:

Internal pullers are common throughout many industries including:

Ag dealersMotorcycle shopsLawn & gardenRegular maintenance

aPPlIcatIons

Ag equipmentPotato equipmentMotorcyclesConveyorsTractorsCombinesPilot bearing removal from crankshaftsSpa and Hot tub pumps

Oil seals from transmission housing*Bearing cup removal from wheel hubFork LiftsBushing removal from transmission gearsMotorsVintage ATC repairsGearcase repairs

Electric motor bearingsBearing cup removal from brake rotors and drumsNeedle bearing removal from transmission gears**Cone bearing removalCar Clutch jobsWheel bearingsSnowmobile pumpsBlind bushings

IndustrialAutomotiveGolf coursesHome maintenance

ConstructionHVACApartment maintenanceMinor repair shops

*Requires Posi Lock’s long jaws and 5 lb. hammer.** Requires Posi Lock’s external silde hammer puller.

Posi Lock’s internal puller with slide rod and hammer help technicians produce maximum force to remove stubborn bearings.

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Slide rod and sliding hammer for maximum force exertion

Cage guides jaws for fast setup, solid contact and superior safety

T-handle locks jaws precisely where you set them

Slim tapered jaws allow for easier gripping and better access to tight spots* Also available with long jaw options

Posi Lock’s internal gear and bearing puller sets the standard for quickness, ease and convenience. The T-handle and patented Safety Cage ®control the jaws at all times, making removal of stubborn bearings a one-man operation. Opening, closing, locking and aligning of the jaws is all done automatically by simply turning the T-handle.

Why PosI lock?