How to replace a jaw coupling spider insert: tools, step-by-step removal and install, how to choose the right replacement material, and when to reuse hubs.
Category Archives: Coupling Guide
Coupling guide
Best Couplings for Servo Motors: Backlash Free Options Compared The genuinely zero-backlash coupling types for servo and motion-control applications are bellows and disc couplings — both transmit torque through a solid metal element with no clearance gaps to wind up before the driven shaft responds. Beam couplings run a close second, with backlash low enough […]
How to Measure Coupling Bore Size: A Step-by-Step Guide Coupling bore size is the actual inside diameter of the hub where your shaft fits — not the shaft’s nominal “nameplate” size, which is often a few thousandths off from what calipers actually read. Measure your shaft diameter directly with calipers at two or three points […]
Understanding Coupling Misalignment: Angular, Parallel, and Axial Explained Shaft misalignment comes in three forms: angular (shafts meet at a slight angle), parallel (shafts run side by side but offset), and axial (shafts move slightly toward or away from each other along their length, sometimes called end-float). Every flexible coupling is rated for a maximum amount […]
Grid Couplings vs Chain Couplings: Which Needs Less Maintenance? Chain couplings are generally the lower-maintenance choice of the two: they use fewer precision parts, tolerate a wider lubrication interval before performance suffers, and are cheaper to service when you do get to them. Grid couplings aren’t high-maintenance by industrial standards, but their spring-steel grid runs […]
Jaw Coupling vs Disc Coupling: Which Do You Need? A jaw coupling uses a replaceable elastomeric spider to absorb shock and handle minor misalignment, while a disc coupling uses a stack of thin metal discs to transmit torque with near-zero backlash and no wearing parts. Choose a jaw coupling for general-duty machinery where cost and […]
How to Measure Coupling Bore Size Coupling bore size is the inside diameter of the coupling hub where your shaft inserts, and it needs to match your shaft diameter within the manufacturer’s stated tolerance — not just be “close enough.” Measure the shaft’s actual diameter with calipers at multiple points, not the coupling’s existing bore, […]
Understanding Coupling Misalignment: Angular, Parallel, and Axial Shaft misalignment comes in three forms — angular (shafts meet at an angle), parallel/offset (shafts run parallel but off-center), and axial (shafts move toward or away from each other along their centerline). Almost every real-world installation has some combination of all three, which is exactly why flexible couplings […]
How to Measure Coupling Bore Size (Without Guessing Wrong) Bore size is the diameter of the hole in a coupling hub that the shaft slides into — and it’s the single most common reason a coupling order gets returned. Measure your shaft with a digital caliper at the point where the coupling will sit, not […]