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Glossary
Glo
ssar
y
Midship Shaft
- A machined element consisting of spline
teeth, a pilot for a center bearing and a piloting hub that
attaches to the tube of a coupling shaft assembly.
Needle Rollers
- One of the rolling elements of a bearing cup
assembly.
Outboard Components
- Yokes that are not a part of a drive-
shaft, i.e. transmission, axle, transfer case end yokes and/or
companion flanges.
Phase Angle
- The relative rotational position of each yoke on
a driveshaft or driveline.
Pressure Relief Hole
- A hold in the welch plug of Spicer slip
yokes that allows air to escape from the slip member assem-
bly.
Purge
- The act of flushing old grease and contaminants from
universal joint kits and slip member assemblies with fresh
grease.
Quick Disconnect Cross Hole
- A semicircular hole located on
the end of each lug ear of some end yoke and flange yoke
designs used to locate a bearing cup assembly.
Retaining Ring
- See Snap Ring.
Retaining Ring Groove
- See Snap Ring Groove.
Seal Can
- A metal "can" that permanently seals the slip mem-
ber on a driveshaft. Usually found on European-style drive-
shaft assemblies.
Seal Guard
- A covering member used to protect a bearing
seal on the bearing cup assembly.
Serrated Flange
- See T-Flange
Shaft Length
- Distance between the outermost universal joint
center to joint center.
Shaft Support Bearing
- See Center Bearing
Slinger
- A stamped metal or non-metal ring which prevents
the entry of foreign matter into a center bearing, transmission,
axle or transfer case.
Slip
- The total permissible length of axial travel.
Slip Yoke
- A yoke which accomodates axial movement.
Slip Yoke Plug
- See Welch Plug.
Slip Yoke Seal
- Pop-on or threaded ring that contains a seal
that protects the slip member assembly from environmental
contaminants and retains lubricant.
Snap Ring
- A removable member used as a shoulder to
retain and position a bearing cup assembly in a yoke cross
hole.
Snap Ring Groove
- A groove used to locate a snap ring.
Spline
- A machined element consisting of integral keys
(spline teeth) or keyways (spaces) equally spaced around a
circle or portion thereof.
Spline Sleeve
- A tubular-type, machined element consisting
of internal splines which is attached to a tube or tube yoke in a
driveshaft assembly.
Spring Tab
- A patented stamped metal plate that takes the
place of a bearing plate and acts as a structural member by
reducing looseness in a universal joint kit. Found only on
Spicer Life Series driveshaft assemblies.
Stub Shaft
- See Tube Shaft.
Tang
- A nib of metal found on Quick Disconnect end yoke
and/or flange yoke style cross holes, used to locate a bearing
cup assembly.
T-Flange
- A companion flange and flange yoke design which
has a serrated flange face. Found most often in European
applications.
T-Type Flange
- See T-Flange.
Thrust Washer
- A washer found in the bottom of a bearing
cup assembly that reduces needle roller friction, bearing heat
and guards against end galling on the journal cross trunnions.
Tubing
- See Tube.
Tube O.D. (outside diameter)
- The outside diameter of a
tube.
Tube Yoke
- An inboard yoke with a piloting hub for attach-
ment to a tube or spline sleeve.
Tube Shaft
- A machined element consisting of spline teeth
and a piloting hub that attaches to the tube of a driveshaft
assembly.
Trunnion(s)
- Any of the four projecting journals of a cross.
