2-jaw bearing puller

2-jaw bearing pullers serve to remove bearings, bushings, gears and mechanical components requiring even pulling force from two symmetrical sides. This tool group helps separate components from shafts or housings without causing deformation, avoiding direct hammer impact that can damage machined surfaces. The structure consists of two symmetrical jaws mounted on sliding shoulders or a C-frame, allowing adjustment of jaw opening to match component diameter.

Models in the group have openings ranging from tens of millimeters to hundreds of millimeters, serving from small bushings on electric motors to large bearings on truck gearboxes. High-grade alloy steel material ensures the necessary hardness when subjected to large pulling forces, with surfaces typically zinc-plated to resist corrosion in oil and grease environments. Puller jaws feature anti-twist design, maintaining position when force is applied.

Some variants combine internal and external puller functions on the same frame, saving toolbox space. The product group includes ranges from parallel-jaw pullers, scissor-type pullers, to specialized pullers for battery terminals or automotive tie rod ball joints. Each type meets specific requirements for working space, component shape and force application method.

Classification by jaw structure

Jaw structure determines how the tool grips the component and transmits force. Parallel-jaw pullers allow flexible reversal between internal and external puller modes, suitable when quick change of force direction is needed. Scissor-type pullers have two jaws mounted crosswise like scissor blades, creating concentrated pulling force in the narrow gap between bearing and shaft. Thin-claw jaw pullers with curved blade edges grip curved surfaces closely, typically used for bushings with tight surrounding space.

The 317- range uses parallel-jaw structure, jaw opening from 15 mm to 350 mm. Jaws slide on shoulders allowing distance adjustment, quick reversal between internal and external puller without accessory removal. The 322- range applies scissor-type design, opening from 6 mm to 100 mm or from 10 mm to 140 mm depending on model. Two crossed jaws create a narrow angle, easily entering the gap between bearing and housing. The 173K range has thin-claw Krallex-type jaws, opening from 20 mm to 200 mm, curved blade edges help grip bearings closely in limited rear space.

Classification by internal/external puller function

Internal or external puller function depends on component mounting position. External pullers clamp onto the bearing outer face, pulling the component off the shaft. Internal pullers push from inside the bore, separating the bearing from the housing. Some models combine both functions, reducing the number of tools needed on site.

The 172 Series specializes in external pulling, jaw opening from 20 mm to 220 mm, puller legs clamp into grooves or bearing outer faces. The 173- range combines internal and external pulling, opening from 20 mm to 640 mm, anti-twist jaws when subjected to large forces. The 173S-2 range provides three different jaw pairs in one frame, opening 25 mm to 130 mm, each pair serving a separate size range. The 176- range has jaw opening from 18 mm to 500 mm, structure varies by load and opening, suitable for removing gears or large bearings on gearboxes.

Specialized applications

Beyond removing standard bearings, some models are designed for specific applications. Battery terminal pullers remove positive and negative terminals from battery cases without deforming connectors. Ball joint pullers separate tie rod ball joints on automotive steering by direct axial pressing force, avoiding hammer blows that cause cracking. These tools have jaw shapes and opening angles suited to specific component geometry.

The 174-50 range specializes in removing battery terminals, jaw opening from 10 mm to 60 mm, serving battery maintenance on vehicles and energy storage stations. The 168- range separates ball joints on automotive steering and stabilizer links, screw shaft presses ball joint end out of taper without causing deformation. The 174-80-2 range has jaw opening from 10 mm to 90 mm, special design for bearings, bushings, gears and pulleys, external puller function with even pulling force.

Selection by jaw opening

Jaw opening must be larger than the outer diameter of the component to be removed. Measure bearing or gear diameter beforehand, select model with suitable opening range. Tools too small cannot grip, tools too large cause waste and are difficult to control in tight spaces. Ranges have multiple models with different opening spans, from tens of millimeters to hundreds of millimeters.

For components with diameter under 100 mm, the 322- or 174-80-2 range responds well. For components from 100 mm to 200 mm, the 173K or 172 Series range is suitable. For components larger than 200 mm, the 173- or 176- range provides opening up to 640 mm or 500 mm. The 317- range has maximum opening of 350 mm, balancing size and flexible reversal capability.

Usage precautions

Before applying force, check that puller jaws are firmly clamped into grooves or component flat surfaces. Slipping or misaligned jaws can damage machined surfaces or cause accidents when force releases suddenly. Turn screw shaft gradually, observe component movement to detect jamming or distortion. If required force is too large, recheck clamping position or apply penetrating oil into the gap between bearing and shaft.

Do not use a hammer to strike puller jaws directly, as this can crack alloy steel or misalign jaws. If additional force is needed, use screw shaft or hydraulic press mechanism integrated in some models. After use, wipe off oil and grease adhering to surfaces, store in a dry place to prevent rust that reduces adjustment accuracy. Periodically check screw threads and sliding surfaces, apply light grease if stiff or jammed during adjustment.

The 2-jaw bearing puller product group provides safe removal solutions for bearings, bushings and mechanical components requiring even pulling force. Selection based on jaw opening, jaw structure and internal/external puller function helps optimize work efficiency and protect components from damage.