Shaft locking devices allow easy attachment
A
Lovejoy product story
Edited by the Engineeringtalk editorial team
Jan 7, 2004
A new range of shaft locking devices allow for easy attachment of shaft to hub without time and money spent on machining or extra assembly labour.
The new Lovejoy shaft locking devices allow for easy attachment of shaft to hub without time and money spent on machining or extra assembly labour.
Simple axial and angular adjustments are possible to allow for equipment timing if needed.
This versatile part offers smooth, reliable performance from the punishing cycle of transport required in the aggregate or pulp and paper industries to the more precision timing requirements in printing and packaging, due to the need for zero backlash during operation.
"Market perception is that frictional locking devices are expensive and difficult to size, so they're reserved for highly technical solutions", says Jim Minton, Vice President of Lovejoy.
"Lovejoy SLD is here to shatter those perceptions and introduce a well-engineered, yet affordable and adjustable part that solves engineering and maintenance difficulties associated with other connection alternatives".
The Lovejoy shaft locking device offers a frictional, keyless shaft-to-hub securing system that, compared to conventional alternatives, such as interference fits or welds, providing an easily adjustable (and releasable) mechanical shrink fit for multiple bore sizes in low- to high-speed operations.
"Conventional shaft locking methods, keys, keyways, shrink fit bores/hubs and splines, all have their inherent problems", says Minton.
"A key or keyway system requires a larger shaft to maintain the strength needed to provide maximum torque in the application, and can't provide zero backlash.
And interference fits or welds prevent the operator from being able to easily remove the shaft from the hub for maintenance or replacement".
The Lovejoy keyless shaft locking device uses an inclined plane principle that convert clamping forces generated by tightening locking screws to create a mechanical shrink fit connection.
This frictional, keyless system enables transmission of high-torque and axial loads, and accommodates reversing, dynamic or shock loading.
The shaft locking device from Lovejoy not only eliminates keys, keyways, splines and fretting corrosion costs; it securely fastens hub to shaft, eliminating potentially harmful movement between a hub and shaft that can lead to costly machining, replacement or refurbishing of mated parts.
Lovejoy offers both inch and metric bore sizes that are directly interchangeable with conventional shaft locking devices currently on the market.
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