SKF TMMP 10 Heavy Duty Jaw Puller, 100 kN, 3-Arm

A three-arm, self-centring puller for medium and large bearings

One of the most common ways to dismount small to medium size bearings is a basic mechanical puller, and using a purpose-built SKF puller helps protect the bearing and its seating. The SKF TMMP 10 is the middle size of the heavy duty three-arm TMMP series, with a maximum withdrawal force of 100 kN (11.2 US ton). Its unique pantograph system gives an exceptional grip and helps counteract misalignment during operation, and the puller is self-centring.

SKF describes the series as fast, efficient and smooth to handle, made of blackened, high quality steel for corrosion resistance, and available with other arm lengths. Pulling forces of 60 to 150 kN across the three models cover medium to large bearings, pulleys, gears and couplings.

Technical specifications: the TMMP series

Picking size and arm length

The three variables are the width of grip, which must exceed the diameter of the part you grip behind, the effective arm length, which must reach it, and the force. The TMMP 6 suits a grip of 50 to 127 mm, the TMMP 10 covers 100 to 223 mm, and the TMMP 15 covers 140 to 326 mm. Longer optional arms are available for deep seated parts. When a job needs more than 150 kN or an easier pull, SKF offers the hydraulically assisted TMHP series, listed separately as the

SKF TMHP 30/170.

What to confirm before ordering

Measure the part to be pulled, the gap behind it and the distance the claws must travel. Make sure the puller is rated for the force the seating needs, use protective equipment, and pull squarely along the shaft axis. Optional arms are ordered by the suffix numbers above.

Position the three claws evenly behind the part, hook them on the inner ring of the bearing or on a strong shoulder, and turn the spindle with steady force. If the part resists, a little penetrating oil or controlled heat on the component, not the shaft, can help; stop if the puller starts to tilt. The pantograph action keeps the arms parallel, which helps prevent slipping, but pulling against an outer ring will damage the bearing.

Check the puller before each use: the claws should be undamaged, the pantograph arms should move freely, and the spindle thread should be clean and lightly lubricated. Select arms long enough that the claws sit fully behind the part and not on the tips, because a shallow hook is the usual cause of slipping. Keep a record of the puller model and arm option fitted to avoid mismatches on the next job.

Planning a bearing removal with the TMMP 10

A good pull starts before the puller touches the machine. Isolate and lock out the equipment, remove guards and any components that block access, and clean the shaft so the bearing, pulley or gear can travel freely once it breaks loose. Note how the part was originally fitted: an interference fit on a shaft needs a different approach from a part held mainly by corrosion or fretting.

Check that the end of the shaft gives a sound seat for the spindle point, and that the shaft is supported so it cannot drop or swing when the part releases. On larger assemblies, sling or support the component being removed, because a heavy gear or coupling hub can fall suddenly once it clears the shaft shoulder.

Matching the puller to the job

Use the width-of-grip and arm-length figures in the specification table against your measured dimensions, and leave some margin rather than working at the very edge of the range. If the part is a bearing that will be reused, plan the pull so force passes through the ring that sits on the shaft. Where withdrawal force looks likely to exceed what a mechanical puller can deliver comfortably, stop and review the method instead of adding extensions to the spindle handle.

Workshop and field use in Oman's climate

Maintenance teams in Omani cement plants, desalination sites, mines and ports often remove bearings outdoors or in hot, dusty workshops. Sand and grit on the spindle thread increase friction and wear, so wipe the thread clean before use and re-lubricate it afterwards. Steel tools left in direct summer sun can become uncomfortably hot to handle, and gloves suited to both heat and grip help the operator keep control.

Coastal humidity and salt air attack bare steel. Although the puller is blackened, store it dry, apply a light protective oil film to exposed surfaces after use near the sea, and keep it in a case or rack rather than loose in a vehicle where it can be knocked and contaminated.

Keeping the puller ready for the next shutdown

Include the TMMP 10 in the workshop tool register with its fitted arm option and the date of its last inspection. After every job, examine the claws for cracks, bending or flattened tips, check that the arms still sit parallel under light load, and listen for roughness as the spindle turns. A damaged arm or claw should be replaced before the tool goes back on the shelf.

Train technicians to stand clear of the line of the shaft during a pull and to stop if the puller tilts or the claws begin to creep. Logging difficult removals, including the method used and any heat applied, gives the next crew useful information when the same machine comes due for bearing replacement.

Documents and quotation

The SKF leaflet covers all TMMP and TMHP models and is attached here. Send the model and arm option, quantity and delivery point for a quotation.