SKF TMBH 1 and TWIM 15 Heater: When a Portable Unit Is Best and How to Use It

The SKF TMBH 1 heater is a portable device that heats bearings and other metal parts by magnetic induction. It is used to expand the bore of the part and facilitate mounting on the shaft, without impacts or excessive force. Unlike a bench heater, it can be taken to the machine or maintenance point. This makes it practical for field work, where disassembling and transporting the part is complicated.

In industrial plants, induction heating replaces risky methods such as the torch or hot oil bath. With a torch, it is difficult to control the temperature and the material or bearing seal can be damaged. Hot oil, besides being dirty, involves fire and contamination risks. The portable heater allows even and controlled heating, directly on the part.

The TMBH and TWIM series equipment is marketed for machinery maintenance in industries such as food, paper, mining, or processing. They are useful for mounting small and medium bearings in pumps, motors, gearboxes, and other rotating equipment. Being portable, they adapt to maintenance crews moving within the plant. The part is heated in place, mounted, and left to cool so it fits on the shaft.

A portable heater like the SKF TMBH 1 heater is the logical choice when mounting is done on the machine and not in the workshop. If the shaft is in a large or hard-to-access piece of equipment, heating the bearing next to the mounting point avoids transport and the part cooling on the way. Bench heaters, such as the TIH series, stay in the workshop and the bearing is placed on their yoke. In contrast, the portable one is taken to the work site and heats the part right there.

For small or medium parts, the portable unit is very convenient because it heats the part at the work site. The unit is placed on a stable surface near the mounting point. In repetitive production line assemblies, a bench unit may be more comfortable, but the portable one wins in flexibility. Each plant evaluates whether it prioritizes mobility or serial production.

The codes TMBH 40 and TMBH 5/230V are other equipment in the TMBH series that we also quote. The TWIM 15/230V, meanwhile, is another portable induction heater, on which the part to be heated rests. When requesting a quote, it is advisable to indicate which part will be heated and how often. This way we can guide you on the most suitable equipment for your case.

Before using the SKF TMBH 1 heater, verify that the part is clean, without dirt or adhered chips. The unit is placed on the part as indicated in its manual and turned on to generate the magnetic field. The part is heated by induced currents, not by direct contact. It is important not to exceed the recommended temperature for the bearing, which is usually indicated in the manufacturer's manual.

During heating, keep tools, watches, and other metal objects away from the magnetic field, and people with pacemakers should not approach the unit. With sealed bearings or polyamide cages, respect the temperature indicated by the manufacturer. The operator controls the temperature with the unit's probe and uses thermal protection gloves to handle the part. Once hot, the part is carefully mounted and left to cool on the shaft.

A common mistake is overheating the part, which can damage the material or internal lubricant. Another mistake is heating dirty parts or parts with adhered metal chips. Always read the equipment manual and follow safety instructions. If you have doubts about the procedure, you can consult us before operating.

Within the TMBH series, in addition to the SKF TMBH 1 heater, there are variants such as TMBH 1-1A, TMBH 1-2, TMBH 1-3, and TMBH 1-5. These codes correspond to accessories or spare parts used with the main unit. Not all models use the same accessories, so it is key to correctly identify the equipment. With the heater code and the part to be heated, we indicate which one corresponds.

The TWIM series includes the model TWIM 15/230V and the accessory TWIM 15-3. As with TMBH, the accessory is chosen according to the application and the size of the part. It is not advisable to improvise with parts that are not from the equipment: an incorrect accessory may not heat the part properly or may damage the heater.

To order a spare part or accessory, send the exact code that appears on the equipment plate or in the manual. If you cannot find it, send us a photo of the heater and the part to be heated. With that, we quote the correct spare part or accessory. We also advise you if you need a complete unit for a new application.

To quote a SKF TMBH 1 heater, the first step is to confirm the exact equipment code. The identification plate shows the model and supply voltage, for example 230V. If the equipment is used, the plate may be worn; in that case, a photo helps identify it. It is also useful to know which parts will be heated: bearing type, bore diameter, and material.

The bearing bore diameter is the most important data for choosing the right heater. Heating a small electric motor bearing is not the same as a medium gearbox bearing. The weight of the part also matters, as it defines how much energy is needed to heat it. With that data, we guide you on which portable unit is best.

If you already have a heater and need a spare part, indicate the equipment code and the accessory code if you know it. The codes TMBH 1-1A, TMBH 1-2, TMBH 1-3, and TMBH 1-5 are examples of accessories that are marketed. Not all are compatible with each other, so do not order them without verifying. Send us a query via WhatsApp or email with as much information as possible.

A frequent mistake is ordering a heater without specifying the supply voltage. Models may come in 230V or other voltages, and that changes the equipment needed. Another mistake is assuming that all accessories are universal: in the TMBH series, each variant has its function. Always verify the complete code before buying.

In use, the most serious mistake is heating with a torch: the direct flame heats unevenly, can damage the bearing, and is a source of accidents. The induction heater is safe if times and temperatures are respected. Do not force mounting if the part does not fit easily: better check the size and heating before continuing.

It is also a mistake not to clean the part before heating it. Dirt can burn and leave residues inside the bearing. After mounting, let the part cool naturally, without cooling it with water. If you have doubts about the procedure, consult us before operating the equipment.

To request a quote for the SKF TMBH 1 heater, write to us via WhatsApp or email with the equipment code. If you do not know the code, tell us which part you will heat and in which machine. With that, we indicate the model and the corresponding accessories. You can also send us a photo of the part or the current equipment.

If you need a portable heater for a specific application, describe the job: bearing type, size, frequency of use, and work location. This way we recommend between a TMBH, a TWIM, or another unit in the line. We market the TMBH and TWIM series, with their accessories and spare parts.

Send your query to our WhatsApp or sales email. We will respond promptly with the quote and the technical data you need. We also advise you on the safe use of the equipment in your plant. We work with genuine SKF product, from Buenos Aires, Argentina.