Артикул: RX8457
Linear Sets with Super Linear Bushings A, tandem, closed-type, R1085 LSAT-A-..-DD
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Description
- Lightweight precision tandem housing (aluminum)
- Two Super Linear Bushings A
- External seals
- Relubricatable
Features
- Also available as Linear Motion Slide.
Product description
For precision guides with easy installation. Fixed working bore diameter.
Technical data
General technical data
| Ø d | mm | 12 | 16 | 20 | 25 | 30 | 40 | 50 |
| amax | m/s² | 150 | ||||||
| vmax 1) | m/s | 3 | ||||||
| m | kg | 0.27 | 0.41 | 0.72 | 1.35 | 2.01 | 3.67 | 6.3 |
| FR 2) | N | 0.8 | 1 | 1.5 | 2 | 2.5 | 3 | 4 |
| Breakaway force | N | 1.5 | 2 | 3 | 4.5 | 6 | 8 | 10 |
| Shaft radial clearance h6 | µm | + 38 + 10 | + 43 + 11 | + 50 + 12 | ||||
| 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 | 12 | 16 | 20 | 25 | 30 | 40 | 50 |
| C 1) | N | 1660 | 2430 | 4010 | 8180 | 9520 | 16360 | 23930 |
| C0 1) | N | 980 | 1660 | 2680 | 4940 | 7140 | 11140 | 16560 |
| ML | Nm | 26 | 18 | 84 | 141 | 289 | 576 | 1097 |
| ML0 | Nm | 16 | 13 | 54 | 86 | 206 | 374 | 725 |
| 1) | Load rating when both Linear Bushings are under equal load. The load ratings apply for the main direction of loading. If the load direction is not the main direction of loading, the dynamic load ratings must be multiplied by the following factors:Ø d 10 to 16: f = 0.82, f0 = 0.86,Ø d 20 to 50: f = 0.82, f0 = 0.78 |
| 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 |
| ML | Dynamic longitudinal moment load capacity | Nm |
| ML0 | Static longitudinal moment load capacity | Nm |
| vmax | Maximum permissible speed | m/s |
Impact of load direction on load rating of closed Linear Bushings
The listed load ratings should be chosen depending on installation in minimum or maximum position and should be based on the calculations. If the load direction is clearly defined and the Linear Bushings can be installed in maximum position, the load ratings Cmax. (dynamic load rating) and C0 max (static load rating) can be used. If aligned installation is not possible or the load direction is not defined, the minimum load ratings must be used.
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 |
Dimensions
| a) | Vent hole |
| b) | Lubricating hole M8 x 1 sealed with plastic cap |
Dimensions
| Ød | mm | 12 | 16 | 20 | 25 | 30 | 40 | 50 |
| D | mm | 22 | 26 | 32 | 40 | 47 | 62 | 75 |
| B | mm | 42 | 50 | 60 | 74 | 84 | 108 | 130 |
| E1 | 40 mm ±0.15 | 45 mm ±0.15 | 55 mm ±0.15 | 70 mm ±0.15 | 85 mm ±0.15 | 100 mm ±0.15 | 125 mm ±0.2 | |
| E2 | 30 mm ±0.15 | 36 mm ±0.15 | 45 mm ±0.15 | 54 mm ±0.15 | 62 mm ±0.15 | 80 mm ±0.15 | 100 mm ±0.2 | |
| H | mm | 18 | 22 | 25 | 30 | 35 | 45 | 50 |
| Tolerance for H 1) | µm | + 8 - 16 | ||||||
| H1 | mm | 35 | 42 | 50 | 60 | 70 | 90 | 105 |
| H3 | mm | 10 | 12 | 13 | 15 | 16 | 20 | |
| L | mm | 76 | 84 | 104 | 130 | 152 | 176 | 224 |
| N | mm | 13 | 18 | 22 | 26 | 34 | ||
| N1 | mm | 28 | 35 | 41 | 49 | 56 | 74 | 89 |
| S 2) | mm | 5.3 | 6.6 | 8.4 | 10.5 | 13.5 | ||
| S1 | M6 | M8 | M10 | M12 | M16 | |||
| 1) | Clamped (fastened) in relation to Ø d. |
| 2) | Fixing screws ISO 4762-8.8 |
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.
General mounting instructions
Maintenance
Note on lubrication:
Only lubricate on shaft and until lubricant seeps out of vent hole.
Lubrication
Accessories
Wiper seals for closed-type Super Linear Bushings and Standard Linear Bushings
Wiper seals for closed-type Super Linear Bushings and Standard Linear Bushings
- Galvanized metal case
- Elastomer wiper seal
Metal cases for Super Linear Bushings and standard Linear Bushings
Metal cases for Super Linear Bushings and standard Linear Bushings
- Galvanized steel
Hydraulic-type lube nipple according to DIN 71412 Form A
Hydraulic-type lube nipple according to DIN 71412 Form A
Funnel-type lube nipple according to DIN 3405 Form A
Funnel-type lube nipple according to DIN 3405 Form A
Certification
Directives and standards
Safety Instructions
Downloads
 | 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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