ETP HYDRO-GRIP Hydraulic keyless shaft bushings for fast, precise shaft-to-hub connections
Faster mounting
Mounts in seconds
Zero backlash
Full shaft-to-hub contact
Low profile
Minimized hub diameter
Ultra-low runout
Superior concentricity
Why choose a keyless shaft bushing?
A keyless bushing doesn’t rely on a key to transmit torque. It uses the entire circumference of the shaft, with surface pressure distributed evenly over the full length of the connection — reducing the micro-movements that cause fretting. ETP® bushings use a self-contained hydraulic pressure medium for a secure, zero-backlash connection.
No keyway required
Surface pressure holds the hub in place — no keyways, tapers or tapped holes that weaken the shaft and cause fretting, corrosion and backlash.
Infinitely phase-adjustable
Set the angle and axial position freely, then lock. Ideal for phasing and timing to synchronize machine components.
Fast changeovers
Mount and dismount with a few actuating screws — a single screw in many cases — hundreds to thousands of times with no change in performance.
Smaller shafts, same torque
Without a milled keyway, a smaller shaft can transmit the same torque — saving space, material and machining costs.
Precise location
ETP bushings don’t “walk” along the shaft during actuation, so components stay exactly where you set them.
Stainless options
Stainless-steel models are available for wash-down, food and other corrosive environments.
Field-proven in a wide range of applications
Packaging machines
Fast format changes on pulleys, rollers and cams
See examples
Printing & converting
Register-perfect cylinders and gears
See examples
Machine tools
High-precision spindles and tool holding
See examples
Automation & robotics
Compact, backlash-free servo connections
See examples
Paper, steel & heavy industry
High torque on large rolls and shafts
See examples