Артикул: RX8461
Linear Sets with Super Linear Bushings A, with side opening, adjustable, R1072 LSASE-A-..-DD
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Description
- Lightweight precision housing (aluminum)
- Super Linear Bushing A with self-alignment feature
- Secured by grooved taper pin
- External seals
- Relubricatable
Product description
For zero-clearance or preloaded guides. Adjusting screw for adjusting radial clearance. These Linear Sets come set to zero clearance.
Loads exerted counter to the direction of opening with open Linear Bushings usually result in a considerable reduction in load capacity. In order to prevent this and facilitate the installation of specific open Linear Bushings, the lightweight Linear Set with side opening has been developed.
Technical data
General technical data
| Ø d | mm | 20 | 25 | 30 | 40 | 50 |
| amax | m/s² | 150 | ||||
| vmax 1) | m/s | 3 | ||||
| m | kg | 0.42 | 0.8 | 1.2 | 2 | 3.2 |
| FR 2) | N | 1.5 | 2 | 2.5 | 3 | 4 |
| Breakaway force | N | 3 | 4.5 | 6 | 8 | 10 |
| Radial clearance | Comes clamped to h5 shaft (lower limit) and set to zero clearance | |||||
| Operating conditions | ||||||
| Permissible ambient temperature (min ... max) | -10 °C ... +80 °C | |||||
| 1) | Speeds of up to 5 m/s possible. Service life is limited by heightened wear to plastic parts. Tests have shown total travel from 50 • 105 m to 100 • 105 m without failure. |
| 2) | Frictional drags generated by Linear Bushings with integrated wiper seals on two sides when not under radial load. The frictional drags depend on speed and lubrication. |
Load capacities and load moments
| Ød | mm | 20 | 25 | 30 | 40 | 50 |
| C 1) | N | 2570 | 4130 | 5020 | 8620 | 12500 |
| C0 1) | N | 1180 | 2250 | 2880 | 4480 | 6620 |
| 1) | The load ratings apply for the main direction of loading. |
| The load ratings are based on a total travel of 100, 00 m. When based on 50 000 m, the values in the table need to be multiplied by 1.26. |
Legend
| Symbol | Description | Unit |
| Ød | Shaft diameters | mm |
| amax | Maximum acceleration travel | m/s2 |
| C | Dynamic load capacity | N |
| C0 | Static load capacity | N |
| FR | Friction force | N |
| m | Mass | kg |
| vmax | Maximum permissible speed | m/s |
See the notes on installing Linear Sets with side opening.
For load in the direction of opening, please refer to the loading diagrams (see "Diagrams" section).
Impact of load direction on load rating of open Linear Bushings
The load ratings C and C0 apply for the main direction of loading ρ = 0°. For all other load directions, the load ratings must be multiplied by the factors fρ (dynamic load rating C) or fρ0 (static load rating C0).
Installing specific Linear Bushings can prevent reductions in load capacity (see Linear Set with side opening).
Reduced load capacity with short stroke
In case of short stroke, the service life of the shaft is less than that of the super Linear Bushing. The load ratings C specified in the tables must therefore be multiplied by the factor f.s .
| 1) | fs = factor |
| 2) | s = movement path |
Reduced load capacity with high load
If the load F on a Super Linear Bushing A is more than F > 0.5 x C, the dynamic load rating C decreases.
Definition of dynamic load ratings
Self-alignment feature
The self-alignment feature in the steel bearing plates and machined ball guide grooves ensure quieter travel. The flow chart shows a comparison with a conventional Linear Bushing. The example is based on a load of 800 N and misalignment of about 8 ft (caused by shaft deflection).
Due to the self-alignment feature, two super Linear Bushings must be used on at least one of the shafts in the guide.
| FR = Frictional drag | |
| s = travel distance | |
| v = travel speed | |
| a) | Super Linear Bushing, A Ød 20 |
| b) | Conventional Linear Bushing, Ød 20 |
Diagrams/characteristic curves
Dimensions
| a) | Lubricating hole M8 x 1 sealed with plastic cap |
Dimensions
| Ød | mm | 20 | 25 | 30 | 40 | 50 |
| D | mm | 32 | 40 | 47 | 62 | 75 |
| α | ° | 55 | 57 | 56 | 54 | |
| A | mm | 60 | 75 | 86 | 110 | 127 |
| E1 | 22 mm ±0.15 | 28 mm ±0.15 | 34 mm ±0.15 | 43 mm ±0.15 | 50 mm ±0.15 | |
| E2 | 30 mm ±0.15 | 36 mm ±0.15 | 42 mm ±0.15 | 48 mm ±0.15 | 62 mm ±0.15 | |
| E3 | mm | 33 | 42 | 48 | 62 | 70 |
| E4 | mm | 42 | 52 | 60 | 68 | 85 |
| H | mm | 30 | 35 | 40 | 45 | 50 |
| Tolerance for H 1) | µm | + 8 - 16 | ||||
| H1 | mm | 60 | 72 | 82 | 100 | 115 |
| H3 | mm | 32 | 38 | 44 | 50 | 56 |
| H4 | mm | 22 | 26 | 30 | 38 | 45 |
| L | mm | 54 | 67 | 79 | 91 | 113 |
| L3 | mm | 23.5 | 29 | 34 | 40 | 48 |
| M 1) | 17 mm ±0.01 | 21 mm ±0.01 | 25 mm ±0.01 | 32 mm ±0.01 | 38 mm ±0.01 | |
| N1 | mm | 42 | 50 | 55 | 67 | 78 |
| N2 | mm | 15 | 18 | 24 | 30 | |
| S 2) | mm | 8.4 | 10.5 | 13.5 | 15.5 | 17.5 |
| S1 | M10 | M12 | M16 | M20 | ||
| S2 3) | mm | 6 | 8 | 10 | 12 | |
| SW | mm | 2.5 | 3 | 4 | 5 | |
| V | mm | 5 | 6.5 | 8 | 10 | 12 |
| W 4) | mm | 9 | 11.5 | 14 | 19.5 | 22.5 |
| 1) | Clamped (fastened) in relation to Ø d. |
| 2) | Fixing screws ISO 4762-8.8 |
| 3) | Pin hole centering. |
| 4) | Minimum size in relation to Ø d. |
Project planning information
Life expectancy calculation
Mounting
Radial clearance
The radial clearance values shown in the table have been determined from statistics and correspond to values expected in practice. The adjustable Linear Sets come clamped to an h5 shaft (lower limit) and set to zero clearance.
Vertical dimension
The tolerance values for the vertical dimension "H" for the Linear Sets shown in the table have been determined from statistics and correspond to values expected in practice.
Bolts
We recommend bolts in accordance with ISO 4762-8.8 for fastening the Linear Sets.
Lubrication
On-shaft relubrication on relubricatable Linear Bushing only until lubricant seeps out.
Notes on installing Linear Sets with side opening
No reference edges:
- Straighten the first shaft using the shaft support rail and fasten it in place.
- Align the second shaft parallel to the first and fasten it in place.
- Slide the Linear Sets onto the shaft and fasten them to the machine table.
With reference edges:
- Press the first shaft with shaft support rail onto the reference edge and fasten the shaft support rail in place.
- Align the second shaft parallel to the first and fasten the shaft support rail in place.
- Slide the Linear Sets onto the shafts.
- Next:
- with one reference edge on the machine base and one on the machine table:
- Press the Linear Sets on the first shaft onto the reference edge of the machine table and fasten into place.
- Fasten the Linear Sets on the second shaft to the machine table.
- with just one reference edge on the machine base:
- Fasten Linear Sets to the machine table.
- with one reference edge on the machine base and one on the machine table:
General mounting instructions
Maintenance
load errorCertification
load errorSafety Instructions
load errorDownloads
 | Linear Bushings and Shafts Manual | R320103669 | 2005-07-01 | English, French, German, Italian | PDF | 3.6MB Product Groups: Linear Bushings and Shafts |
| Linear Bushings Catalog | R999000488 | 2015-02-01 | English | PDF | 14.9MB Product Groups: Linear Bushings and Shafts |
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