Fasten in Three Dimensions
Monogram’s Adjustable Bushing fasteners operate by radial expansion, not through clamp-up or compression, the methods used by conventional fasteners.
This radial compression is provided by a series of alternately tapered segments which are allowed free axial movement on a supporting core shaft. When an axial load is applied, the outer “female” segments expand into the inner diameter of the hole while the outer “male” segments contract against the core shaft. All clearance between the hole and the fastener is thereby removed, providing an extremely rigid joint.
What Adjustable Diameter Fasteners Do Best
- Remove or reduce fretting or wear due to vibration or movement
- Provide high shear strengths
- Remove play and reduce structural vibration
- Provide near-perfect alignment
- Allow completely blind fastening
- Provide interference-fit capability while requiring only commercial hole tolerances
- Permit quick-release fastening
- Provide an extremely rigid joint
- Install easily with no special tools or training
Adjustable Diameter Fasteners, with their benefits and ease of installation, excel in these typical applications –
Rigid Structural Joints Rod End Bearing Pins
Adjustable diameter fasteners Adjustable diameter fasteners
provide extremely tight radial remove all clearance between
fitsyet allow clearances for easy the pin and the inner race as well
installation and removal with no as between the pin and the yoke,
special tools or special training. eliminating backlash and assuring
proper bearing rotation thereby
eliminating the troublesome
problem of the inner race rotating.
Adjustable Clearance Fits Taper Pin Replacement
Adjustable diameter fasteners Test verify that adjustable diameter
provide an adjustable clearance fasteners make structural or linkage
fit in everyday drill tolerance holes. joints more rigid or truly elastic
By simply torquing the nut the (zero hysteresis) than do press fit
desired radial tightness can be pins or taper pins. Use of adjustable
obtained. The assembly can be fasteners greatly simplifies
repeatedly adjusted to compensate fabrication since only normal drill
for wear or to vary the fit as desired. hole tolerances are required. Interchangeability is maintained
and costly taper reaming on
assembly is eliminated.
Adjustable Diameter Fasteners are available from Monogram Aerospace in the following configurations:
