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  1. Make sure the surfaces of the vertical posts are clean.
  2. Improve the contact between the vertical post and the crossbar by applying a light coat of Vaseline or grease to the contact surface of the vertical post.
  3. The temperature probe should always be placed on or as close as possible to the inner race or ID of the workpiece being heated.
  4. When possible make sure a second probe is placed on the outer race or OD of the workpiece being heated to also track the temperature of the OD, in line with the ID probe.
  5. For the most efficient heating, always use the largest possible crossbar that will fit through the ID of the workpiece being heated. Stacking of multiple crossbars is permissible.
  6. It is not a requirement that the workpiece must touch the crossbar(s). Just so long as the bar goes through the bore (ID) someplace.
  7. Most important of all is that the workpiece being heated always be automatically demagnetized. Any induction heater that does not do this automatically COSTS you money instead of saving it.

by Bernd Seidenthal CRL

It seems that every maintenance department has a hard time installing bearings because of the problems inherent in conventional heating methods.

Applying care, good technique and heating methods is better. Over 90% of rotating equipment has defects at startup that can result in equipment failure.

One reason bearing installation is often a herculean task is not using proper heating methods. Excessive heat applied to the bearing during installation can introduce defects that lead to premature equipment failure.  Instead, heating a bearing up on an induction heater, automatically demagnetizing it, and then slipping it on the shaft free of stresses is the way it should be done. The results of overheating a bearing are increased maintenance cost, increased safety risks, and more equipment downtime.

Proper heating methods and best practices should be applied to correctly install bearings.  Induction heaters such as SURETHERM can help eliminate induced bearing defects due to poor fitting and improper mounting techniques.  Induction bearing heaters provide increased safety, increased efficiency and reduce the risk of bearing contamination and damage that can result from using brute strength, oil baths, blow torches or other improper methods of heating bearings for proper installation.

Here are some conventional methods that are used in Industry and why they are not the way to install bearings:

Blow Torch
 – No temperature control
– Risk of over heating
– Grease leaks out of bearing
– Tension in material

Hot Plate
– No temperature control
– Risk of over heating
– Grease leaks out of bearing
– Tension in material
– Dangerous (plate stays hot)
Oil Bath
– Slow heating process
– New grease cooks out of bearing
– Dangerous (hot oil)
– Environmentally unfriendly
Oven
– Slow heating process
– High energy consumption
– Grease leaks out of bearing

by Bernd Seidenthal CRL

We are thrilled to announce we have teamed up with TM Induction Heating in the Netherlands to bring to the US market the SURETHERM line of induction heaters —a new generation of low frequency and highly efficient induction heaters for a wide range of applications. With 25 years of experience, TM Induction Heating is the industry leader in safe heating processes offering standard as well as custom solutions with  both bench top and floor stand models. Heat work pieces safely and efficiently with precise temperature control and automatic demagnetizing with real-time feedback and heating cycle graphs.

We are excited by the opportunity to partner with TM Induction Heating. Their induction heaters are the perfect complement to our alignment, ultrasound and vibration tools as they support your quest for reliability in preventing premature bearing failures from improper installation —Ana Maria Delgado, Marketing Manager of LUDECA.

Bernd Seidenthal, Assistant Vice President LUDECA and Tim Loedeman, CEO TM Induction Heating

TM’s SURETHERM heaters can help eliminate induced bearing defects from poor fitting and improper mounting techniques. TM’s innovative dual sensor temperature mode allows for 100% tension free heating of the workpiece independent of size or diameter. In addition to bearings, SURETHERM heaters can be used to precisely heat and shrink fit couplings, rings, sprockets and pulleys without inducing uneven loading or stress.

by Ana Maria Delgado, CRL