WF - Maintenance free selflubricating sliding elements
Products in the WF-group
- Slidingplates
- Wear plates
- Cover plates
- Multiple area wear plates
- Straight guide bearings
- Plain bearings
- Flanged bearings
- Details acc. to drawings
- V-gibs
- Cam stroke plates
Information about WF
(Wartungs freie Gleitelementen, selflubricating slidingelements). Due to constantly increasing maintenance cost the use of self-lubricating sliding elements is becoming more important. The WF-products starts where normal selflubricating bearings and plates ends.
WF 750 -sliding elements are preferably recommended where loads are very high and sliding speeds < 0,5 m/s respectively where an oscillating sliding movement takes place.
Alloys
WF 750-1, a hard "high tensile brass" with ISO no. CuZn25Al5, is the basic alloy in all stocked products. If another alloy is wished for we can offer most alloys and special sizes acc. to your requirements.
In the table below there is a listing of some alternative alloys.
| WF- alloys |
Material- name |
Stress proof Rp 0,2 N/mm 2 |
UTS R m N/mm 2 |
Elong. A 5 % |
Brinell Hard- ness HB 10 |
Load- carrying capacity N/mm2 |
Applicational areas |
|---|---|---|---|---|---|---|---|
| WF 750-1 (Std- alloy) |
CuZn25Al5 SS 5234 DIN 1709 C 86300 |
480 | 750 | 8 | 180 | 50 | High loadcapacity, high abrasion and wear resistance and moderate corrosion resistance. Hardened mating material is favourable. |
| WF 750-2 | SS 5716 CuAl10NiFe DIN 1714 C 95500 |
300 | 700 | 13 | 160 | 50 | High cavitation, erosion and corrosion resistance. Insensitive to shock stress and very good abrasionand wear-resistance. Hardened mating mtrl. |
| WF 750-3 | SS 5465 DIN 1705 C90700 |
150 | 280 | 6 | 95 | 2 | For medium stress, good behaviour of embed, usuable for many applications and sea water resitant. Unhardened mating material possible. |
| WF 750-4 | RG 7 Rödmetall DIN 1705 |
130 | 270 | 13 | 75 | 30 | Std. material for general application and medium stress. Also seawater- resistant, few sensitive to edge pres-sure. Unhard. mating mtrl. possible. |
| WF 750-5 | GG 20 DIN 1791 |
200 | 160 | 20 | Good sliding characteristics under low load . Unhardened mating material possible. | ||
| WF 750-6 | CK 15, 45 DIN 17210 DIN 1720 |
20 | Sliding surface hardened. For appli-cations with less stringent sliding requirements. |
10 advantages offered by WF 750 self-lubricating elements
- Maintenance-free
- Wear-resistant
- Lower coeffecient of friction
- Heat-resistant up to ca.150° C
- Long life (with special-performance macro-depots up to 250° C)
- Corrosion-resistant
- Shock-resistant
- No excess lubricant
- Ideally suited for oscillating movement
- Stick-slip-free movement
Important facts
WF 750 self lubricating sliding element are preferably recommended where sliding speeds are < 0,5 m/s respectively where an oscillating movement takes place. For extreme service, (i.e. sliding speed >2,0 m/s) additional lubrication is possible and recommended. Maintenance-free performance of self-lubricating elements requires a proper portion of lubricant. In order to embed the lubricant, we recommend the following minimum wall thickness:
Guideplates : > 10 mm
Bearings : 5 % of inner diameter + 3 mm
Type and arrangements of lubricant macro-deposits as well as portion of lubricant depend on shape of self-lubricating element and sliding direction. They are established for each specific application.
Back up material - The difference in hardness between WF 750-1/2/3 and 4 and the back up material should have a hardness of 100 BHN minimum.
Installation guidelines
The following press fit should be used to fit the bearing into the housing:
Housing : H7
Bearing Od Ø: r6
Before start-up it is important to oil or grease both sliding surfaces. Commercially available oils or greases can be used.
This is where WF 750 can be put to the best use
- Steel mills
- General engineering and steel fabrications
- Rolling mills
- Automotive industry (tool posts, body presses)
- Packing machinery
- Chemical industry
- Shipbuilding
- Offshore-equipment
- Hydraulic structures
- Hoist- and conveyor equipment
- Welding technology
- Construction and quarrying industry, etc.
For further information
Please don´t hesitate to contact us if further information is needed or wished for.
Phone: +46 19 10 45 25
Fax: +46 19 12 38 55
E-mail : brons@lagermetall.se
