Page 301 - needle bearings

Linear Ball Bearings
NTN

Components Infinite Finite Rotating Remarks
motion motion motion

Inscribed circle diameter: П20 The operating temperature shall be held within the range of
Outer diameter: П32 ʕ ˓ ˓ -25 to 100˚C, to prevent deterioration of seal and grease.
Width: 45

Due to its resin cage, this bearing shall be used at allowable
temperature 90˚C and, under continuous running, at 80˚C
and less. The double-row type has an elastic joint on the cage
center so double rows of flat rollers can be bent to any
Roller diameter: f2.5 optional angle along the elastic joint by heating them in oil of
Width: 18 ˓ ʕ ʷ 70 to 90˚C. By cooling down the double-row rollers with the
ZW: Double-row type bent angle held unchanged for several seconds after having
bent them to any optional angle, the bent shape of the double
rows can be held unchanged so that the double-row rollers
can be mounted on a V-shaped surface as illustrated.

Where the resin cage RF is used, the bearing shall be used at
allowable temperature 90˚C and, under continuous running, at
80˚C and less.
Roller diameter: f3
Width: 20 ˓ ʕ ʷ The standard length of the bearing unit with BF cage is
Cage length: 1000 1000 mm.
The standard length of the bearing unit with RF cage is 705 mm.
Two or more bearings of this type can’t be jointed with each
other, but it can be supplied at any desired length on request.

Section height: 26 ˓ ʕ ʷ
Bearing overall length: 86

B-239