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Description
- Rugged all-metal design with steel ball retainer for harsh environments and heavy contamination
- Many pockets acting as lubricant reservoirs for extended lubrication intervals or lubrication for life
- Seal-free and with steel ball retainers for temperatures well above 80 °C or vacuumed applications
- With locating hole for axial and radial securing (no locating hole for shaft diameters 12 and 16)
- Optional integrated wiper seals
Features
- For use in woodworking, foundries, cement plants
- Pockets collect any dirt that may have worked its way in to prevent the Linear Bushing from jamming.
- No wiper seals, come with integrated steel retaining rings; higher temperatures allowed with shaft diameters 12 and higher
- Hardened and machined outer sleeve
- Steel ball retainer
- Balls made of rolling bearing steel
Technical data
General technical data
| Ø d | mm | 12 1) | 16 1) | 20 | 25 | 30 | 40 | 50 | 60 | 80 |
| amax | m/s² | 100 | 50 | |||||||
| vmax | m/s | 2.5 | 2 | |||||||
| m | kg | 0.03 | 0.04 | 0.08 | 0.15 | 0.26 | 0.52 | 0.95 | 1.76 | 3.92 |
| FR 2) 3) | N | 3 | 4 | 6 | 7 | 8 | 11 | 14 | 16 | 20 |
| Breakaway force 2) | N | 8 | 12 | 16 | 19 | 24 | 32 | 40 | 48 | 60 |
| μ 4) | 0,001 ... 0,004 | |||||||||
| Rows of balls | 3 | 4 | 5 | |||||||
| Shaft radial clearance h6/bore H7 | µm | + 41 + 14 | + 43 + 14 | + 49 + 16 | + 50 + 17 | + 60 + 20 | + 68 + 22 | + 71 + 24 | ||
| Shaft radial clearance h6/bore K7 | µm | + 26 - 1 | + 28 - 1 | + 31 - 2 | + 32 - 1 | + 39 - 1 | + 43 - 1 | + 46 - 1 | ||
| Operating conditions | ||||||||||
| Permissible ambient temperature (min ... max) 5) | -10 °C ... +80 °C | |||||||||
| 1) | No locating hole for radial and axial securing. |
| 2) | One wiper seal: Multiply by a factor of 0.5. |
| 3) | 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. |
| 4) | 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. |
| 5) | Only unsealed Linear Bushings with steel ball retainers may be used at higher temperatures. Make allowance for reductions in load capacity. |
Load capacities and load moments
| Ød | mm | 12 1) | 16 1) | 20 | 25 | 30 | 40 | 50 | 60 | 80 |
| C 2) | N | 430 | 600 | 1280 | 2270 | 2890 | 5280 | 8470 | 11800 | 21500 |
| C0 2) | N | 290 | 450 | 970 | 1750 | 2390 | 4000 | 6900 | 9780 | 17400 |
| 1) | No locating hole for radial and axial securing. |
| 2) | The load ratings C and C0 apply to the main direction of loading. |
| 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 |
| vmax | Maximum permissible speed | m/s |
| μ | Friction coefficient |
For load in the direction of opening, please refer to the loading diagrams (see "Diagrams" section).
Impact of load direction on load rating of open Linear Bushings
The load ratings C and C0 apply for the main direction of loading ρ = 0°. For all other load directions, the load ratings must be multiplied by the factors fρ (dynamic load rating C) or fρ0 (static load rating C0).
Installing specific Linear Bushings can prevent reductions in load capacity (see Linear Set with side opening).
Definition of dynamic load ratings
Installation dimensions/interchangeability
Standard Linear Bushings have the same installation dimensions as super Linear Bushings. They are interchangeable, differ however in terms of securing, radial clearance, load ratings and lubrication.
Sealing
Standard Linear Bushings come with a wiper seal with shaft diameters of 5 and higher. Open standard Linear Bushings with shaft diameters 20 to 80 can also come fully sealed (with longitudinal seal; increased friction).
Diagrams/characteristic curves
Load direction factors
Dimensions
Dimensions
| Ød | mm | 12 1) | 16 1) | 20 | 25 | 30 | 40 | 50 | 60 | 80 | |
| D | mm | 22 | 26 | 32 | 40 | 47 | 62 | 75 | 90 | 120 | |
| α | ° | 78 | 60 | 50 | 54 | ||||||
| C | h12 | mm | 32 | 36 | 45 | 58 | 68 | 80 | 100 | 125 | 165 |
| C1 | H13 | mm | 22.6 | 24.6 | 31.2 | 43.7 | 51.7 | 60.3 | 77.3 | 101.3 | 133.3 |
| C2 | mm | 1.3 | 1.6 | 1.85 | 2.15 | 2.65 | 3.15 | 4.15 | |||
| D1 | mm | 20.5 | 24.9 | 30.5 | 38.5 | 44.5 | 58 | 71 | 85 | 114 | |
| E 2) | mm | 7.5 | 10 | 12.5 | 16.8 | 21 | 27.2 | 36.3 | |||
| 1) | No locating hole for radial and axial securing. |
| 2) | Minimum size in relation to Ø d. |
Legend
| Symbol | Description | Unit |
| Ød | Shaft diameters | mm |
| C/C0 | Main direction of loading |
Project planning information
Shaft diameters 12 and 16 must be installed as shown (inversely) in order to avoid lifting off the shaft. It is not possible to set a single linear bushing (slotted housing with adjusting screw) to zero clearance.
Life expectancy calculation
Mounting
General mounting instructions
Customer-built housings
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
load errorCertification
load errorSafety Instructions
load errorDownloads
 | 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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