Lovejoy L-Series Jaw Coupling Cross Reference Guide The Lovejoy L-Series (L070 through L225) is the most widely copied jaw coupling dimensional standard in power transmission — which is exactly why cross-referencing one correctly matters. Because the physical envelope (bore range, outside diameter, hub length) is common across manufacturers, a coupling stamped with a different brand […]
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, […]
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Best Couplings for Servo Motors Beam (helical) and disc couplings are the two best choices for most servo motor applications, because both deliver the zero-backlash, high torsional stiffness performance precision motion control demands. Beam couplings suit lighter loads and tighter budgets — encoders, small CNC axes, 3D printer motion systems. Disc couplings step up for […]
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 […]
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Best Couplings for Log Splitters Engine-to-Pump Coupling Guide Most gas-engine log splitters connect the engine to the hydraulic pump with a jaw-type coupling, and it’s usually the first thing to fail after the pump seals. Here’s what to look for in a replacement and which sizes fit the most common splitter builds. Why Log Splitters […]
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Jaw couplings and disc couplings both connect two rotating shafts while absorbing misalignment, but they solve the problem differently. Jaw couplings use a flexible spider insert for shock absorption and easy field replacement; disc couplings use thin metal discs for a zero-backlash, high-precision connection. Here’s how to pick the right one. Jaw Couplings: Built for […]
Log splitters put jaw couplings through one of the hardest use cases in light industrial equipment. Every cycle — from idle to full hydraulic pressure — generates a sharp shock load through the drivetrain. Get the coupling wrong and you’ll be replacing spiders every season. Get it right and the coupling outlasts everything else on […]
The Lovejoy L-series is the most widely used jaw coupling range in North America. If you’re replacing a worn coupling or specifying a new drive, this guide gives you every size, bore range, OD, and spider type in one place — plus the equivalent part numbers from competing brands. Lovejoy L-Series Size Chart Size Bore […]