BOSCH REXROTH
R108361220
$235.18 USD
- BOSCH REXROTH
- Material:R108361220
- Model:LSAFT-A-12-DD
Quantity in stock: 0
The Bosch Rexroth LINEAR-SET LSAFT-A-12-DD (R108361220) is a meticulously engineered linear motion set designed for precision applications. This product is part of the Linear Set series and features an aluminum tandem flange construction with a standard precision lightweight flanged housing, enhancing its durability and stability. It includes two super linear bushings A, which are known for their self-aligning capabilities, ensuring smooth and accurate linear motion. The unit is equipped with two external seals that protect against contaminants, extending the service life of the components. The LINEAR-SET LSAFT-A-12-DD boasts a shaft diameter 'd' that provides robust support for the system. It offers a relubrication feature that allows for easy maintenance, ensuring consistent performance over time. With radial clearance that is not adjustable, this set maintains its precision throughout its use. The outer diameter 'D' is designed to fit seamlessly into various applications without compromising space or functionality. This linear set can handle dynamic load capacities and static load ratings effectively while sustaining maximum accelerations without sacrificing performance. It operates efficiently within a permissible ambient temperature range, making it versatile for different working environments. The breakaway force and maximum permissible linear speed indicate the robustness of this unit under various operational conditions. With a weight of only 0.3 kg, the LINEAR-SET LSAFT-A-12-DD is lightweight yet powerful in its application. Its design allows for vertical shaft configurations, expanding its usability across multiple design scenarios where precise linear motion is required. Whether it's used in automation systems or complex machinery, this Bosch Rexroth product delivers reliability and precision in motion control tasks.
Linear set (aluminum), FT-A-12, with two seals
Linear set (aluminum)
Tandem, flange
With super LB A
Shaft diameter d = 12
With two seals
Version: Standard
Unpacked Weight: 0.2 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 | 32 |
| Footnote dynamic load capacity C | Load capacity when both linear bushings are under equal load. |
| Size H | 34 |
| Max. acceleration amax | 150 |
| Permissible ambient temperature | -10 °C ... +80 °C |
| Outer diameter D | 22 |
| Size H3 | 19 |
| Breakaway force | 1.5 |
| Maximum permissible linear speed vmax | 3 |
| Size D | 22 |
| Size D3 | 30 |
| Footnote static load capacity C0 | Load capacity when both linear bushings are under equal load. |
| Size N1 | 13 |
| Static load rating C0 | 840 |
| 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 | 0.8 |
| Productgroup ID | 17 |
| Size N2 | 36 |
| Permissible ambient temperature (max) | |
| Size D2 g7 | 30 |
| Size E2 | 24 |
| Dynamic longitudinal moment load capacity ML | 26 |
| Permissible ambient temperature (min) | |
| Size S | 5.3 |
| Size L1 | 46 |
| Shaft diameter d | 12 |
| 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 | 1350 |
| Static longitudinal moment load capacity ML0 | 16 |
| Size L | 76 |
| Size B | 42 |
| Weight | 0.2 |
| 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
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 sealCatalog
Instructions
Service
CAD data
Metal cases for Super Linear Bushings and standard Linear Bushings
Metal cases for Super Linear Bushings and standard Linear Bushings
Galvanized steelCatalog
Instructions
Service
CAD data
Hydraulic-type lube nipple according to DIN 71412 Form A
Hydraulic-type lube nipple according to DIN 71412 Form A
Catalog
Instructions
Service
Funnel-type lube nipple according to DIN 3405 Form A
Funnel-type lube nipple according to DIN 3405 Form A
Catalog
Instructions
Service