BOSCH REXROTH
R108362020
$270.84 USD
- BOSCH REXROTH
- Material:R108362020
- Model:LSAFT-A-20-DD
Quantity in stock: 0
The Bosch Rexroth LINEAR-SET LSAFT-A-20-DD (R108362020) is a high-precision linear motion component designed for various applications requiring precise and smooth linear movement. This linear set includes a lightweight flanged aluminum housing, integrating two super linear bushings A with self-alignment features and two external seals to protect against contaminants. The shaft diameter 'd' ensures compatibility with corresponding components, while the spigot and threaded bottom area facilitate secure and straightforward mounting. The product is characterized by its standard precision construction, offering reliable performance in a range of settings. It is designed to be relubricatable, allowing for easy maintenance and extended service life. The radial clearance of this model is not adjustable, ensuring stable operation once installed. The LINEAR-SET LSAFT-A-20-DD can handle dynamic load capacities as well as static loads when both bushings are under equal load, making it suitable for various industrial applications. With the ability to withstand maximum accelerations and operate within a wide range of ambient temperatures, this linear set demonstrates versatility in diverse working conditions. Additionally, it has been tested for high travel distances without failure, highlighting its durability. The breakaway force and maximum permissible linear speed are optimized for efficiency and longevity, while the friction force remains low to minimize resistance during operation. Weighing in at just 0.5 kg, the LINEAR-SET LSAFT-A-20-DD is also notable for its lightness, contributing to the ease of installation and handling in systems where weight is a concern. Its modular design makes it an ideal choice for vertical shaft designs within the Linear Set series. Overall, this product offers a robust solution for those seeking reliable linear motion components that combine performance with ease of use and maintenance.
Linear set (aluminum), FT-A-20, with two seals
Linear set (aluminum)
Tandem, flange
With super LB A
Shaft diameter d = 20
With two seals
Version: Standard
Unpacked Weight: 0.52 kg
This modular unit complements the Linear Set series and is used for designs with a vertical shaft.
| Precision lightweight flanged housing (aluminum) |
| Two super linear bushings A |
| Two external seals |
| Spigot |
| Thread for bolting from bottom area |
| Relubricatable |
| Radial clearance not adjustable |
| Data Sheet | Download Data Sheet |
| 2D CAD | Download 2D CAD |
| 2D CAD | Download 2D CAD |
| 3D CAD | Download 3D CAD |
| 3D CAD | Download 3D CAD |
| Manual | Download Manual |
| Manual | Download Manual |
| Manual | Download Manual |
| Manual | Download Manual |
| Manual | Download Manual |
| Size V | 10 |
| Series | Super A (with self-alignment feature) |
| Footnote friction force FR | 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. |
| Size E1 | 45 |
| Footnote dynamic load capacity C | Load capacity when both linear bushings are under equal load. |
| Size H | 50 |
| Max. acceleration amax | 150 |
| Permissible ambient temperature | -10 °C ... +80 °C |
| Outer diameter D | 32 |
| Size H3 | 27 |
| Breakaway force | 3 |
| Maximum permissible linear speed vmax | 3 |
| Size D | 32 |
| Size D3 | 42 |
| Footnote static load capacity C0 | Load capacity when both linear bushings are under equal load. |
| Size N1 | 22 |
| Static load rating C0 | 2100 |
| Note: Maximum permissible speed vmax | 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. |
| Friction force | 1.5 |
| Productgroup ID | 17 |
| Size N2 | 50 |
| Permissible ambient temperature (max) | |
| Size D2 g7 | 42 |
| Size E2 | 35 |
| Dynamic longitudinal moment load capacity ML | 84 |
| Permissible ambient temperature (min) | |
| Size S | 8.4 |
| Size L1 | 60 |
| Shaft diameter d | 20 |
| Linear guide type | Linear bushing and shaft |
| Filter for linear bushings and shafts | Linear sets with linear bushings |
| Format of linear bushings | FT – Flanged, tandem |
| Dynamic load capacity C | 3280 |
| Static longitudinal moment load capacity ML0 | 54 |
| Size L | 104 |
| Size B | 60 |
| Weight | 0.52 |
| Size D1 with tolerance |
General technical data
|
Ø d |
mm |
12 | 16 | 20 | 25 | 30 |
|
amax |
m/s² |
150 | ||||
|
vmax 1) |
m/s |
3 | ||||
|
m |
kg |
0.2 | 0.32 | 0.55 | 1 | 1.5 |
|
FR 2) |
N |
0.8 | 1 | 1.5 | 2 | 2.5 |
|
Breakaway force |
N |
1.5 | 2 | 3 | 4.5 | 6 |
|
Shaft radial clearance h6 |
µm |
+ 38 + 10 |
+ 43 + 11 |
|||
|
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 |
|
C 1) |
N |
1350 | 1660 | 3280 | 6420 | 7800 |
|
C0 1) |
N |
840 | 1060 | 2100 | 4360 | 5580 |
|
ML |
Nm |
26 | 35 | 84 | 205 | 289 |
|
ML0 |
Nm |
16 | 22 | 54 | 140 | 206 |
| 1) | Load rating when both Linear Bushings are under equal load. |
| 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 |
| a) | Lubricating hole M8 x 1 sealed with plastic cap |
| b) | Vent hole |
| c) | Mounting options |
| d) | Via drill hole S |
| e) | Via thread S1 |
| f) | Via drill hole S |
| g) | Centering via collar D2 |
Dimensions
|
Ød |
mm |
12 | 16 | 20 | 25 | 30 | |
|
D |
mm |
22 | 26 | 32 | 40 | 47 | |
|
B |
mm |
42 | 50 | 60 | 74 | 84 | |
|
D2 1) |
g7 |
mm |
30 | 35 | 42 | 52 | 61 |
|
D3 |
mm |
30 | 35 | 42 | 52 | 61 | |
|
Tolerance for D3 |
µm |
- 100 - 300 |
|||||
|
E1 |
32 mm ±0.15 | 38 mm ±0.15 | 45 mm ±0.15 | 56 mm ±0.15 | 64 mm ±0.15 | ||
|
E2 |
24 mm ±0.15 | 28 mm ±0.15 | 35 mm ±0.15 | 42 mm ±0.15 | 50 mm ±0.15 | ||
|
H |
mm |
34 | 40 | 50 | 60 | 70 | |
|
H3 |
mm |
19 | 22 | 27 | 32 | 37 | |
|
L |
mm |
76 | 84 | 104 | 130 | 152 | |
|
L1 |
mm |
46 | 50 | 60 | 73 | 82 | |
|
L1 |
46 mm | 50 mm | 60 mm | 73 mm | 82 mm | ||
|
N1 |
mm |
13 | 18 | 22 | 26 | 34 | |
|
N2 |
mm |
36 | 40 | 50 | 63 | 74 | |
|
S 2) |
mm |
5.3 | 6.6 | 8.4 | 10.5 | 13.5 | |
|
S1 |
M6 | M8 | M10 | M12 | M16 | ||
|
V |
mm |
10 | |||||
| 1) | Recommended installation: Mounting hole D2H7. |
| 2) | Fixing screws ISO 4762-8.8 |
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
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