oilless guide bushing

oilless guide bushing
oilless guide bushing

Oilless guide bushing are a type of graphite plugged bronze bushing. As it’s used together with guide pin for mould tool making. Poeple called it as oilless guide bushes or oilless guide elements.

Oilless Guide Bushing with embedded solid lubricants are used in applications of linear or rotary motion in tool making, general machine construction and similar engineering application. The structure of the base material provides closely spaced deposits of solid lubricant. The oiless guide elements satisfy highest demands in terms of load bearing capacity at low sliding speeds, within an extensive temperature band. The lubricant deposits are arranged in staggered geometrical patterns, thus ensuring optimal lubrication effect along the sliding motion, especially with counter bearings which are hardened and ground. The sliding surfaces should be lightly greased with lithium grease emulsion, prior to commissioning. On flat guide ways and pillar guides, from 25 to 30 per cent of the sliding surfaces consist of lubricant deposits. Surfaces of counter bearings must have a ground finish, preferably with a lay parallel with the sliding motion.

Advantages of Oilless Guide Bushes and Guide Elements

– good emergency sliding properties

– highest carrying capacity at low speed

– use under water or with chemical solutions

– extremely wide temperature resistance – hot and cold

– damping properties


LuBo #500 Self-lubricating Bearings

LUBO is professional maker of #500 self lubricating bearing.They have very good market share for self lubricating bearing

lubo #500 SP bearing
lubo #500 SP bearing

Detailed Description:

LuBo #500 Series Self-lubricating Bearings can be utilized where heavy loads must be supported at low to medium speeds.
Bearings have high mechanical strength with excellent wear resistance and self-lubrication properties exhibiting stable performance and durability under severe operting conditions.
No form of supplementary lubrication is required. A film of solid lubricant is transferred to the shaft as it starts to run.
In operation, both surfaces burnish quickly and result in a highly polished bearing surface capable of withstanding extreme pressure
LuBo #500 Series Materials

Normally, copper alloy is used as the base material for LuBo #500 series bearings by centrifugal or sand casting. Other materials such as cast iron, stainless steel and even tool steels could be used according to the applications involving extreme temperatures, environments corrosive to bronze, and loads exceeding the compressive strength of bronze.


What’s DU bushing?

SF-1 bushing for gear pump
DU bushing

DU Bushing was invented by Glacier Garlock Bearing company and after that, Glacier Garlock Bearing company register DU™ as its’ trademark.

DU bush has common material structure with steel back,sintered bronze and PTFE. As DU bearing had very good performance under dry condition and have a lot of advantages compared with roller bearing or traditional sintered bronze bushing.Since DU bushing invented, it was widely used in all kinds of industries. Then it becomes more and more popular. Now when people take about DU bushing, it standard for teflon coated composite bearing. In some coutries, poeple also called it as KU bushing, teflon bushing, dry slide bearing.

Our company, is the professional DU bearing manufacturer and exporter. We export 600000000pcs DU bushing to all over the world yearly,if any inquiry, please contact us freely!


Which kind of bearing bushing used for oil gear pumps?

Slide bearings for oil gear pump

Sliding Bearings are Bearings whereby the shaft slides in the Bearing.The friction and wear of Sliding Bearings is higher than in Roller Bearings. To reduce friction lubrication is often used.

So it is important to choose the sliding bearing to support your oil gear Pump.Friction can also be reduced by a proper choice of materials. ‘SF-1T Bearing’ material is used this way. This is a special alloy with lubricating properties.

SF-1 bushing for gear  pump
SF-1 bushing for gear pump

1.PTFE with lead 0.01-0.03mm
2.Porous bronze 0.2-0.3mm
3.Steel backing 0.7-2.3mm
4.Tinplating 0.005mm or copper plating 0.008mm

They are composed of a Specially designed surface and is specifically applied for the high PV bushes of oil gear pump.It is to be used in hydrodynamic or boundary lubricating condition of medium or high pressure gear oil pumps such as P=16-25 Mpa,V=3.5-5m/s.It shows the benefits of low friction coefficient,wear resistant and anti-impact properties.At hydrodynamic lubricating,the PV limit reaches to 120N/mm2.m/s.It is the best choice for the bearings of various kinds of gear pumps as well as plunger pumps,vane pumps and so on.

As below pictures from our customers,you can see the application of sliding bearing for the oil gear pump.The shafts are supported in multi-layer bearings that have excellent anti-friction properties.


What is non-metallic material for sliding bearings?

Sliding bearing of non-metallic materials

Commonly used bearing bearing plastic: plastic with phenol plastics, nylon, PTFE (teflon) and so on, plastic bearings have larger compression strength and abrasion resistance, oil and water lubrication, also has the self-lubricating properties, but poor thermal conductivity.

PTFE POM composite bushing
PTFE POM composite bushing

Sliding bearing on the job as a result of the journal and bearing contact will produce friction, surface cause fever, even “killed”, so in the design of the bearing, should choose sliding bearing materials with good sex of anti-friction bearings, suitable lubricant and appropriate supply method is adopted to improve the bearing structure for thick film lubrication, etc.

Du bushing composition
Du bushing composition

Sliding bearings
1, tile surface corrosion: spectrum analysis found that non-ferrous metal element concentration anomaly;Spectrum appeared a lot of non-ferrous metal components of sub-micron wear particles;Lubricating oil excess moisture, acid value exceeds bid.
2, shaft neck surface corrosion: spectrum analysis found that iron concentration is unusual, there are a lot of iron in iron spectrum of submicron particles, water or high acid value oil paint.
3, a shaft neck surface strain: iron spectrum have iron series cutting grinding grain or black oxide particles, metal surface heat tint.
4, tile back micro wear: spectrum analysis found that iron concentration is unusual, there are a lot of iron in iron spectrum wear submicron particles, lubricating oil moisture and acid value anomalies.
5, a bearing surface strain: iron spectrum found cutting abrasive, abrasive ingredients for non-ferrous metal.
6, tile surface spalling, finds many large size iron spectrum fatigue spalling alloy wear particles, the layered grits.
7, bearing tile burning: there are more iron spectrum by means of large size, alloy and black metal oxides.
8, bearing wear: as the axis of the metal properties (hardness, poor concessions) wait for a reason, easy to cause adhesion wear, abrasive wear, fatigue wear and fretting wear condition.