ACE Stir-Lube® Stirrer Lubricant, model 811710 is manufactured by Ace Glass. This product is used to reduce the wear of stirrer bearings. Low-melting. Only very thin film needed. A non-cooled ACE bearing can be operated at 1500 r.p.m. and water-cooled bearings up to 2000 r.p.m. for many hours with negligible wear.