Solving Problems with Chemicals


Slip Fit - a Know-how you should know

A few drops of LOCTITE Retaining Compound allow fitting bearing  to shaft, even by slip fit "

LOCTITE® 640™  ( 41027 )  is designed for the bonding of cylindrical fitting parts. The product cures when confined in the absence of air between close fitting metal surfaces and prevents loosening and leakage from shock and vibration. Typical applications include retaining keys and splines, eliminating backlash in worn assemblies, retaining bearings in place -preventing spin out, retaining rotor to shafts in fractional and sub-fractional horsepower motors, retaining bushings and sleeves in housings and on shafts, augmenting press fits, restoring the fit to worn assemblies or out of tolerance parts.

Loctite Retaining Compound penetrated into gaps in between mating surfaces. Due to the nature of  anaerobic adhesive, the compound  polymerized to form a thermoplastic and bond the mating parts together 

This is one of the technology, or rather,  a very useful knowledge which some of the very experienced engineers and maintenance  technicians do not know.  Among the criteria of product selection are:  clearance, materials of construction, desired strength, temperature, etc. Do feel free to call us the the right product.

For application guides and ordering information , kindly email :    or

For easy part number identification:
Loctite 601 ( 35449 ), Loctite 603 ( 30994 ),
Loctite 609 ( 23412 ), Loctite 620 ( 30999 ),
Loctite 635 ( 63531 ), Loctite 638 ( 31001 ),
Loctite 641 ( 31006 ), Loctite 648 ( 32717 ),
Loctite 660 ( 22647 ), Loctite 680 ( 23416 )