BOSCH REXROTH
R065821230
$67.73 USD
- BOSCH REXROTH
- Material:R065821230
- Model:KBC-12-DD-NR
Quantity in stock: 0
The Bosch Rexroth COMPACT LIN. BUSH. KBC-12-DD-NR (R065821230) is a high-quality compact linear bushing designed to meet general requirements with a focus on small outer dimensions and highly compact construction. This bushing features a shaft diameter of 12mm and comes with two seals for enhanced protection against contaminants. It is characterized by its normal radial clearance and corrosion-resistant version, making it suitable for applications where environmental conditions can be harsh. The bushing is not pre-lubricated, which allows for flexibility in maintenance depending on the application's lubrication needs. It has been engineered to achieve a high dynamic load rating and long service life due to its hardened segmental load-bearing plates with ball conformity in the running track. The use of stainless steel in its construction makes it ideal for use in sensitive industries such as medical, chemistry, and food processing. With an integrated metal retainer that is approximately 0.3mm larger than the outer diameter of the shaft, this linear bushing ensures a secure fit in the housing bore without additional retention needed. This design also includes many pockets acting as lubricant reservoirs to extend lubrication intervals or even allow for lubrication-free operation under certain conditions. The COMPACT LIN. BUSH. KBC-12-DD-NR boasts a maximum dynamic load capacity (Cmax), high travel speed capabilities up to 5 meters per second, and can operate within an ambient temperature range of -30°C to +80°C. Its closed format with an outer diameter of D1 ensures compatibility with various setups while maintaining a low friction coefficient for smooth operation. This linear bushing's weight is noted at 0.05 kg, providing a balance between robustness and lightweight design for ease of installation and handling during maintenance or replacement processes. It represents an efficient solution for linear motion applications requiring precision, reliability, and durability without significant space requirements or complex mounting procedures.
Compact LB, 12, with two seals, CR, not lubricated
Compact linear bushing
Shaft diameter d = 12
With two seals
Radial clearance: Normal
Version: Corrosion-resistant
Not greased
Unpacked Weight: 0.0187 kg
| Low-cost linear bushing for general requirements |
| Small outer dimensions and highly compact construction |
| High dynamic load rating and long service life due to hardened segmental load-bearing plates with ball conformity in the running track |
| Stainless steel for the medical, chemistry and food industries: Segmental load bearing plates comprising 1.4037 balls made from 1.3541 |
| Integrated wiper seals, external seals or no wiper seals |
| Normal radial clearance |
| Not greased |
| High travel speed (5 m/s) |
| Simple mounting: Just press on – no additional retention needed |
| Many pockets acting as lubricant reservoirs for extended lubrication intervals or lubrication for life |
| Pockets collect any dirt that may have worked its way in to prevent the linear bushing from jamming. |
| Integrated metal retainer about 0.1 mm larger than outer diameter (shaft diameters 12 to 50) for secure fit in housing bore |
| 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 |
| Rows of balls | 5 |
| Series | Compact |
| Footnote friction force FR | One wiper seal: Multiply value with factor 0.5 |
| Maximum dynamic load capacity Cmax | 610 |
| Max. acceleration amax | 150 |
| Footnote friction coefficient μ | Friction coefficients of unsealed linear bushings when lubricated with oil. The friction coefficient is lowest under heavy load, but can still be above the specified value even under a low load. |
| Permissible ambient temperature | -10 °C ... +80 °C |
| Outer diameter D | 19 |
| Breakaway force | 1.5 |
| Maximum permissible linear speed vmax | 5 |
| Size D | 19 |
| Length of linear bushing | 28 |
| Friction coefficient μ | 0,001 ... 0,004 |
| Friction coefficient μ max. | 0.004 |
| Friction force | 0.8 |
| Footnote minimum dynamic load capacity Cmin | The dynamic load capacities are based on a total travel of 100,000 m. When based on 50,000 m, the C values in the table are to be multiplied by 1.26. |
| Friction coefficient μ min. | 0.001 |
| Footnote maximum dynamic load capacity Cmax | The dynamic load capacities are based on a total travel of 100,000 m. When based on 50,000 m, the C values in the table are to be multiplied by 1.26. |
| Productgroup ID | 17 |
| Permissible ambient temperature (max) | |
| Permissible ambient temperature (min) | |
| Friction force FR footnote 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. |
| Footnote breakaway force | One wiper seal: Multiply value with factor 0.5 |
| Minimum static load capacity C0min | 340 |
| Maximum static load capacity C0max | 500 |
| Minimum dynamic load capacity Cmin | 510 |
| Shaft diameter d | 12 |
| Linear guide type | Linear bushing and shaft |
| Format of linear bushings | – Closed |
| Filter for linear bushings and shafts | Linear bushings |
| Footnote minimum static load capacity C0min | |
| Footnote maximum static load capacity C0max | |
| Weight | 0.0187 |
| Size D1 with tolerance | |
| Size C | 28 |
| Radial clearance shaft/bore h6/H7 |
General technical data
|
Ø d |
mm |
8 | 10 | 12 | 14 | 16 | 20 | 25 | 30 | 40 | 50 |
|
amax |
m/s² |
150 | |||||||||
|
vmax |
m/s |
5 | |||||||||
|
m |
kg |
0.011 | 0.014 | 0.016 | 0.018 | 0.025 | 0.028 | 0.058 | 0.08 | 0.14 | 0.17 |
|
FR 1) 2) |
N |
0.4 | 0.5 | 0.8 | 0.9 | 1 | 1.5 | 2 | 2.5 | 3 | 4 |
|
Breakaway force 1) |
N |
0.8 | 1 | 1.5 | 1.8 | 2 | 3 | 4.5 | 6 | 8 | 10 |
|
μ 3) |
0.001 ... 0.004 | ||||||||||
|
Rows of balls |
4 | 5 | 6 | ||||||||
|
Shaft radial clearance h6/bore H7 |
µm |
+ 25 + 2 |
+ 32 0 |
+ 33 - 1 |
+ 36 0 |
+ 42 - 1 |
|||||
|
Operating conditions |
|||||||||||
|
Permissible ambient temperature (min ... max) |
-10 °C ... +80 °C | ||||||||||
| 1) | One wiper seal: Multiply by a factor of 0.5. |
| 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. |
| 3) | Friction coefficients of unsealed Linear Bushings when lubricated with oil. The friction coefficient is lowest under heavy load, but can still be above the specified value even under a low load. |
Load capacities and load moments
|
Ød |
mm |
8 | 10 | 12 | 14 | 16 | 20 | 25 | 30 | 40 | 50 |
|
Cmin |
N |
350 | 420 | 510 | 530 | 660 | 780 | 1630 | 2140 | 3520 | 3970 |
|
Cmax |
N |
410 | 500 | 610 | 630 | 780 | 990 | 2050 | 2700 | 4470 | 5030 |
|
C0min |
N |
280 | 330 | 340 | 400 | 480 | 1050 | 1510 | 2510 | 2890 | |
|
C0max |
N |
400 | 480 | 500 | 580 | 720 | 1560 | 2230 | 3720 | 4280 | |
| 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 |
|
Cmax |
Maximum dynamic load rating |
N |
|
Cmin |
Minimum dynamic load rating |
N |
|
C0max |
Maximum static load rating |
N |
|
C0min |
Minimum static load rating |
N |
|
FR |
Friction force |
N |
|
m |
Mass |
kg |
|
vmax |
Maximum permissible speed |
m/s |
|
μ |
Friction coefficient |
Effect of load direction on load rating
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 shafts is less than that of Linear Bushings. The load ratings C specified in the tables must therefore be multiplied by the factor f.s .
| 1) | fs = factor |
| 2) | s = stroke |
Definition of dynamic load ratings
Sealing
The sealed version contains integrated wiper seals.
Separate wiper seals are also available (no securing necessary).
Installation
Install the Linear Bushings using an arbor press (see "Notes for mounting" below). If Linear Bushings are slightly skewed when initially installed into the housing bore, they will align themselves as they are pressed in. The Linear Bushing does not have to be removed and realigned.
Retention
Shaft diameter 8 and 10: The plastic outer sleeve is oversized. Additional retention is required for vibrations or high acceleration. Starting from shaft diameter 12: The outer diameter of the metal holding ring is oversized. No additional retention needed (bore length ≥ C).
General mounting instructions
Initial lubrication
Linear bushings do not come with initial lubrication. Grease the Linear Bushings before use. Service life data is based on initial lubrication and relubricated Linear Bushings.
Wiper seals for eLINE Linear Bushings and Compact Linear Bushings
Wiper seals for eLINE Linear Bushings and Compact Linear Bushings
Galvanized metal case Elastomer wiper sealCatalog
Instructions
Service
CAD data