Tools for Mechanical Mounting and Dismounting of Bearings

Only professional mounting of roller bearings guarantees the optimum use of your roller bearings. In order to make life easier for you, we can offer a number of FAG‘s tools and accessories for mounting and dismounting roller bearings such as heating devices, mechanical extractors, hydraulic nuts, hand pump sets etc.

Mounting Tool

FAG mounting tool sets allow cost-effective and safe mounting of rolling bearings with bore diameters of 10 to 50 mm or outside diameters of 16 to 110 mm. They can also be used to easily mount sleeves, intermediate rings, seals and similar parts. Tightly fitted inner rings can be driven onto the shaft or outer ring into the housing bore by hitting the mounting sleeve with the hammer. This prevents the mounting forces being transmitted through the rolling elements and raceways, which can lead to damage. The carefully matched FAG precision parts ensure that the forces are uniformly transmitted to the side faces of the bearing rings.

Extraction Tool

Great care is also required during dismounting. The extraction tool must always be applied to the ring to be removed. Mechanical FAG extractors can be used to dismount small rolling bearings up to approx. 100 mm bore diameter that are located with a tight fit on a shaft or in a housing. The extraction force is normally applied by means of a threaded spindle. A hydraulic spindle facilitates work with hydraulic FAG extractors for larger rolling bearings. Extraction forces of up to 400 kN (40 tones) can be generated in this case.

Hook wrenches

Locknuts can be easily tightened and loosened on shafts, adapter sleeves and extraction sleeves using socket wrenches. FAG hook wrenches can be used to tighten and loosen locknuts (precision locknuts) on shafts, adapter sleeves or extraction sleeves. If no torque value is specified, jointed hook wrenches, jointed pin wrenches and jointed face wrenches can be used for locknuts and precision locknuts. Double hook wrenches are engraved with the torsion angles for the appropriate self-aligning ball bearings. The displacement and reduction in radial internal clearance can therefore be precisely set. Both kits and sets contain suitable torque wrenches.

Hydraulic nuts

FAG hydraulic nuts are used for pressing parts with a tapered bore onto tapered seats. They are used primarily where the drive-up force of locknuts and pressure bolts is not sufficient. FAG hydraulic nuts consist of an annular body and a piston. The piston is operated hydraulically. The pressure chamber is sealed by two O-rings of soft PVC. The hydraulic nuts are designed for a maximum oil pressure of 800 bar.
 Their stroke is powerful enough that the rolling bearings or other parts can be mounted in a single operation.

Induction heating

Many rolling bearings and other rotationally symmetric steel parts are tightly fitted onto the shaft. Larger parts in particular, can be fitted more easily if they are pre-heated (rolling bearings up to a maximum of 120 °C).

Induction heating is superior to traditional methods – fast, clean – ideal for batch mounting. Complete bearings, rings of cylindrical roller bearings or needle roller bearings, as well as other rotationally symmetric steel parts such as labyrinth rings, roll couplings, tyres, etc. can be heated. The heart of the induction heater is a current carrying coil with an iron core (primary coil), that generates a high induction current at a low voltage, in a short-circuited secondary circuit (rolling bearings, other steel components). The part for mounting is heated quickly; whilst non-metallic parts and the device itself remain cool.

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