Track roller guidance system ELF

Track roller guidance system ELF

ELFS support rails are composite construction:

  • An high-precision aluminum base element accommodates hardened and polished precision steel shafts that are used as tracks for track rollers.
  • The special rolling-in process ensures the extremely robust bond of the steel shafts to the aluminum base element.

Accuracy of ELFS support rails

The parallelity values specified are determined using differential measurement. The straightness values of the finely aligned support rails are better than DIN EN 12020.

Straightness
L [mm] t1 [mm] t2 [mm]
L < 1000 0,5 0,2
1000 ≤ L < 2000 1 0,3
2000 ≤ L < 3000 1,5 0,4
3000 ≤ L < 4000 2 2
4000 ≤ L < 5000 2,5 0,6
4000 ≤ L < 5000 3 0,7

ELF

Fig. 1: Support rails ELFS

ELF

Fig. 2: Accuracy

Hole pattern

If not otherwise stated, the support rails are supplied with a symmetrical hole pattern. An unsymmetrical hole pattern can also be provided upon request; in this case the minimum distances T1 and T2 must be observed.
All ELFS support rails are also available without holes: code OL.

Installation

  • Lightly tighten screws
  • Align support rails
  • Tighten screws with tightening torque

For high loads, use washers that meet DIN 433 requirements. If installed with no side stop, comply with permissible side loads.

Special conditions for use

Under certain conditions of use, such as vibrations, alternating loads under high acceleration in combination with too soft connection structures, or incompletely supported support rails, the rolled-in steel shafts may drift by several millimeters in the aluminum base element. Where necessary, a positive self-locking axial support is recommended.

Lenght of support rails
L [mm] t3
Single part support rails L < 1000 ±2 mm
1000 ≤ L < 2000 ±3 mm
1000 ≤ L < 4000 ±4 mm
4000 ≤ L ±5 mm
Several part support rails Total length L ±0,1 %
Tightening torque
Screw Tightening torque
ISO 4762-8.8 MA
M5 5,8 Nm
M6 5,8 Nm
M8 24 Nm
M10 48 Nm
Max. lateral load
Size Lateral force
ELFS Fz (zul)
20 200 N
25 330 N
32 / 32E 450 / 900 N
52 / 52E / 52EE 1000 / 1600 / 4000 N

ELF

Fig. 3: Hole pattern

Support rails ELFS for track rollers

Support rails ELFS for track rollers Weight
Type dw b A h b1 h1 h2 d1 d2 M L T TE TEE [kg/m]
ELFS20 4 20 17 12,2 16 9 7.6 4.5 8 M4 3000 62,5 - - 0,79
ELFS25 6 25 21 15 19 10,6 8,5 5,5 10 M5 3000 62,5 - - 1,10
ELFS32 6 32 24 20 26 15 12 6.5 12 M6 6000 125 - - 1,56
ELFS32E 6 32 24 20 26 15 12 6.5 12 M6 6000 - 62,5 - 1,56
ELFS32F 6 32 - 10 26 5 3,5 6,5 12 M6 6000 125 - - 1,10
ELFS52 10 52 40 34 42 25,1 21 11 19 M10 6000 250 - - 4,33
ELFS52E 10 52 40 34 42 25,1 21 11 19 M10 6000 - 125 - 4,33
ELFS52EE 10 52 40 34 42 25,1 21 11 19 M10 6000 - - 62,5 4,33
ELFS52F 10 52 - 18 42 9 8 11 19 M10 6000 250 - - 3,05

Ordering designation

  • T1 and T2 depend on the rail length. In general: T1 (min) / T2 (min) = 20 mm. Other values are possible on request
  • Maximum length of the single-part support rail; longer lengths are delivered in several parts
  • Countersink depth for DIN912 screws - for use with DIN433 washers, DIN7984 screws should be used

ELF

Fig. 4: ELFS .. F

 

Carriage ELFL for support rails

Dimensions (mm) Weight
Type Track roller L B H H1 t4 t5 G4 Hw [kg/m]
ELFL20 LFR50/5-4 KDD 50 55 22 20,5 38 40 M5 9 0,16
ELFL25 LFR50/5-6 KDD 75 64 25 21,9 60 50 M5 10,4 0,35
ELFL32 LFR50/8-6 KDD 90 80 35,5 30 70 59 M8 14 0,40
ELFL52 LFR5201-10 KDD 100 120 54,3 43,2 70 90 M10 19,5 1,00

ELF

Fig. 5: Load directions and moments

Load capacity
  Load ratings
[N]		 Moments
[Nm]
  Cy Coy Cz Coz Mox Moy Moz
ELFL20 1330 845 2300 1620 7 22 11
ELFL25 1330 845 2300 1620 8 41 17
ELFL32 4210 2250 7100 4300 29 132 70
ELFL52 10000 5120 17000 10000 108 300 148
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ELF catalog cover
ELF

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