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Description
- 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 track.
- High travel speed (5 m/s)
- Integrated wiper seals, external seals or no wiper seals
Features
- Normal radial clearance
- Not greased
- Simple mounting: Just press on – no additional securing 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 holding rings about 0.1 mm larger than outer diameter (shaft diameters 12 to 50) for secure fit in housing bore
Technical data
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) | 01 ... 04 | ||||||||||
| 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 | 500 | 600 | 730 | 760 | 950 | 1120 | 2330 | 3060 | 5040 | 5680 |
| Cmax | N | 580 | 720 | 870 | 900 | 1120 | 1410 | 2930 | 3250 | 6380 | 7180 |
| C0min | N | 350 | 410 | 420 | 430 | 500 | 610 | 1310 | 1880 | 3140 | 3610 |
| C0max | N | 500 | 600 | 620 | 630 | 730 | 900 | 1950 | 2790 | 4650 | 5350 |
| 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).
Dimensions
Dimensions
| Ød | mm | 8 | 10 | 12 | 14 | 16 | 20 | 25 | 30 | 40 | 50 |
| D | mm | 15 | 17 | 19 | 21 | 24 | 28 | 35 | 40 | 52 | 62 |
| C | 24 mm ±0.2 | 26 mm ±0.2 | 28 mm ±0.2 | 30 mm ±0.2 | 40 mm ±0.2 | 50 mm ±0.2 | 60 mm ±0.2 | 70 mm ±0.2 | |||
Project planning information
Life expectancy calculation
Mounting
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
Commissioning
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.
Maintenance
Lubrication
Accessories
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 seal
Certification
Directives and standards
Safety Instructions
Notes
Ordering codes
Material numbers
| Ød | Part number | Seals | Lubrication | Short product name | CAD data | Buy |
| mm | ||||||
| 8 | R065800800 | Without wiper seals | Not greased | KBC-08 | ||
| R065810840 | With an integrated wiper seal | KBC-08-D | ||||
| R065820840 | With two integrated wiper seals | KBC-08-DD | ||||
| 10 | R065801000 | Without wiper seals | KBC-10 | |||
| R065811040 | With an integrated wiper seal | KBC-10-D | ||||
| R065821040 | With two integrated wiper seals | KBC-10-DD | ||||
| 12 | R065801200 | Without wiper seals | KBC-12 | |||
| R065811240 | With an integrated wiper seal | KBC-12-D | ||||
| R065821240 | With two integrated wiper seals | KBC-12-DD | ||||
| 14 | R065801400 | Without wiper seals | KBC-14 | |||
| R065811440 | With an integrated wiper seal | KBC-14-D | ||||
| R065821440 | With two integrated wiper seals | KBC-14-DD | ||||
| 16 | R065801600 | Without wiper seals | KBC-16 | |||
| R065811640 | With an integrated wiper seal | KBC-16-D | ||||
| R065821640 | With two integrated wiper seals | KBC-16-DD | ||||
| 20 | R065802000 | Without wiper seals | KBC-20 | |||
| R065812040 | With an integrated wiper seal | KBC-20-D | ||||
| R065822040 | With two integrated wiper seals | KBC-20-DD | ||||
| 25 | R065802500 | Without wiper seals | KBC-25 | |||
| R065812540 | With an integrated wiper seal | KBC-25-D | ||||
| R065822540 | With two integrated wiper seals | KBC-25-DD | ||||
| 30 | R065803000 | Without wiper seals | KBC-30 | |||
| R065813040 | With an integrated wiper seal | KBC-30-D | ||||
| R065823040 | With two integrated wiper seals | KBC-30-DD | ||||
| 40 | R065804000 | Without wiper seals | KBC-40 | |||
| R065814040 | With an integrated wiper seal | KBC-40-D | ||||
| R065824040 | With two integrated wiper seals | KBC-40-DD | ||||
| 50 | R065805000 | Without wiper seals | KBC-50 | |||
| R065815040 | With an integrated wiper seal | KBC-50-D | ||||
| R065825040 | With two integrated wiper seals | KBC-50-DD |
Legend
| Symbol | Description | Unit |
| Ød | Shaft diameters | mm |
Explanation of the short product name using sample Compact Linear Bushing KBC-12-DD-NR
| Example compact Linear Bushing | KBC-12-DD-NR | |
| Type | Linear bushing | = KB |
| Series | Compact | = C |
| Shaft diameters | = 12 | |
| Seals | With two seals | = DD |
| With 1 seal | = D | |
| Without seal | = | |
| Radial clearance | Normal radial clearance | = |
| Linear bushing version | Rust-resistant | = NR |
| Normal | = | |
| Linear bushing lubrication | Not greased | = |
Explanatory example of the short product name
| KB | C | 12 | DD |
| Linear bushing | Compact | Ø12 | With two seals |
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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