Climax Metal C-100 Shaft Collar, Zinc Plated Steel, Set Screw Style, One Piece, 1 Bore, 1-1/2 OD, 5/8 Wide, With 5/16-18 Set Screw

Inner bore diameter is not 1”. Calipers show it was short by 1mm.

Some others complained that the ID was small. Mine was good and it fit on my 1 +/-.003 shaft nicely. Set screw worked as it should.

duper goog

Item arrived on time and worked great.

I used it for my 1-in diameter dumbbell set. It worked perfectly. And you cant beat the price.

1 inch steel collars with hex/ allen wrench screw. Fantastic collars. I originally bought four for two of my weight dumbbells. I just bought eight more for some of my other 1 inch weight dumbbells. Great quality. Tightened the screw with an allen wrench I had and it feels very tight. Perfect fit. Dont make the same mistake I did and buy those cheap plastic 1 inch collars. Instead by the solid steel 1 inch collars. The picture has an example of the cheap plastic ones that you dont want to buy. In the picture I also left the twist collar on too only because I had room but I would feel very comfortable just to put this collar on if I ran out of room on the bar.

This is a well-made product at a great price and fits my motor shaft perfectly.

We use these on a lot of different type jobs

These probably work great for 1 inch precision machined shafts, but they are too small for 1 inch round tube stock from Home Depot or Lowes.

This collars looks good and and shine, the way how I spect.