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Best Rigid Set Screw Couplings

Climax Part RC-050 Mild Steel, Black Oxide Plating Rigid Coupling, 1/2 inch bore, 1 inch OD, 1 1/2 inch length, 1/4-20 x 1/4 Set Screw
RC050, CLIMAX METAL PRODUCTS COMPANY, 1/2^ ROD COUPLING WITH SET.
Reviews
"Great value and exactly what I needed.."
"Bought this for a project with an axel in it."
"Perfect, works exactly as needed."
"Part was of good quality and reasonably priced."
"Had to ship something but cost would have been prohibitive unless I cut it in half."
"Very precise tolerances and fine machining."
"This is a pretty simple device."
"Screw loose after motor turn 10 mins."
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Climax Part RC-100-KW4H @ 90 Mild Steel, Black Oxide Plating Rigid Coupling, 1 inch bore, 2 inch OD, 3 inch length, 5/16-18 x 1/2 Set Screw
Reviews
"It's a piece of steel made with precision."
"They are exactly as advertised, fit is perfect, set screws are very strong and sturdy, you won't strip them or have them work loose, heavy steel and very happy."
"Just the part I was looking for to finish installing my electric door lift---Perfect!"
"well made and good price."
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Climax Metal RC-050-S Coupling, Stainless Steel Grade 303, 1/2" Bore , 1" OD, With 1/4-20 x 1/4 Set Screw
Provided with two set screws made of Stainless Steel 18-8.
Reviews
"Works great for my needs."
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Best Rigid Couplings

Climax Metal RC-025-S Coupling, Stainless Steel Grade 303, 1/4" Bore , 1/2" OD, With 10-32 x 1/8 Set Screw
Provided with two set screws made of Stainless Steel 18-8.
Reviews
"The common flexible variety can stretch then contract, making uses where accuracy is important fail."
"I was working on a project where I needed to couple an RC airplane engine to a large motor."
"Quality was as expected."
"If you need a stainless coupler look no further, just be sure to put some thread locker on the set screws!"
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Best Rigid Clamp-On Couplings

Climax Part ISCC-050-037 Mild Steel, Black Oxide Plating Clamping Coupling, 1/2 inch X 3/8 inch bore, 1 1/8 inch OD, 1 3/4 inch length, 8-32 x 1/2 Clamp Screw
Reviews
"I use this adapter to drive my 1/2" tools on my 3/8" drill motor,works great and the clamps hold tight."
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