Floating Bearings
HepcoMotion Floating Bearings incorporate caged needle rollers and are designed to provide axial movement (float) of the V position. This is especially useful where two rings or track systems are mounted apart, see application example 14.
The float compensates for parallelism tolerances between the opposing V's, eliminating additional loading and maintaining consistent running quality. Three sizes are available, each to correspond with one ring slide section, but they can be used with other sections.
Two stud lengths are available covering most thicknesses of mounting plate, the short version being compatible with HepcoMotion carriage plates. Both versions are available in Concentric (C) which provides a datum (in radial direction) for the system, and Eccentric (DE) which provides sufficient adjustment to allow disengagement of a carriage or ring encircled by bearings 58.
All bearings are greased for life internally. Customers are strongly advised to provide lubrication to the interface between bearings and ring slide by specifying HepcoMotion Lubricators 37 or bleed lubrication system 52. Lubrication greatly increases load capacity and life.
C1 C2 J A H G *3,4 Eccentric (DE)*2 D E *4 B1*5 (Float) B Short stud (RSFJ) / Long stud (RLFJ) Part
Number ... FJ25 ...
... FJ34 ... ... FJ54 ...
For use with A B B1*5 C C1 C2 D Min Max RSFJ RLFJ RSFJ RLFJ RSFJ RLFJ ±0.025 E E1 F Metric Fine
G H ~
R25 RD25 RES, RIS TNS 25 18.1 9 10.5 9.8 19 3.8 13 3.4 4.9 20.27 11.5 10 M8 x 1 14 0.8 R44 RD44 REM, RIM TNM 34 23.2 11.5 13.5 13.8 22 6.6 14.8 5.2 5.9 27.13 16 12 M10 x 1.25 18 1 R76
- REL, RIL TNL 54 37.2 19 21.6 17.8 30 8.2 20.4 5.7 7.9 41.76 28 25 M14 x 1.5 28 1.3
J K L M M1 N*6 O*1 +0
-0.03
1 5 3 13 17 2.75 1.25 6 4 17 21
3.6 1.6 8 6 22 28 5.5
Notes: 1.
8 13 AT25 10 15 AT34 14 27 AT54
RT8
RT10 RT14
P
Adjusting Wrench
*3
Socket Tool *3
g~ RSFJ..C/DE RLFJ..C/DE 58
130 495
60
135 505
Max
Working Load
Capacity (N) 1500
3000 5000
Bearing Static (Co) and Dynamic (C) Radial Load Capacities (N)
Co 6100
12500 28900
C
4900 11500 21500
C P E1 K L O*1 F M M1 Concentric (C)*2 N*6
Part Number
... FJ25 ... ... FJ34 ... ... FJ54 ...
2. Nuts and washers are supplied with both concentric and eccentric RSFJ/RLFJ type bearings. 3. For adjustment procedure and bearing fixing nut tightening torques see
It is recommended that holes to suit bearing mounting studs should be reamed to tolerance F6 for a sliding fit. 58.
4. Fasteners are black on the concentric version and bright zinc plated on the eccentric version for identification purposes. 5. 'B1' dimension is the min/max axial movement of the V center. 6. 'N' is the eccentric offset due to the double eccentric design (2 x N = total stroke).
Ordering details:
Fixing type: RSFJ = Short Stud RLFJ = Long Stud
Bearing diameter (options are 25, 34 & 54)
36 RSFJ 25 C NS NS = Nitrile Sealed Standard for all floating bearings
Journal Type: C = Concentric (fixed) DE = Eccentric (adjustable)
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