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Oil Free Bushings, Washers
Lubrication-free bushings/washers are bearing components that don't require lubricating oil. Since bearings usually receive a lot of frictional resistance that generates heat, lubricants such as oil or grease are used to prevent the seizing or abnormal wear that this frictional heat could otherwise cause. Lubrication-f
Lubrication-free bushings/washers are bearing components that don't require lubricating oil. Since bearings usually receive a lot of frictional resistance that generates heat, lubricants such as oil or grease are used to prevent the seizing or abnormal wear that this frictional heat could otherwise cause. Lubrication-free bushings don't need lubricating oil because the bearing body has a lubricating structure made possible by lubricating oil in the bearing body, or by embedded solid lubricant or the like. Lubrication-free washers are washers that can receive thrust loads, and have the same lubricating structure as lubrication-free bushings. They are usually used together with lubrication-free bushings. Lubrication-free bushings and washers are both highly effective under conditions where using lubricants is difficult due to the operating environment or structure. They also greatly reduce maintenance costs by eliminating the need for regular lubrication, and enabling stable operation over long periods.
Oil Free Bushings, Washers
FAQ Oil free Bushing and washer
There is guaranteed value for surface pressure of load displayed at "Maximum allowable surface pressure"
Assuming that load acting on the surface of the inner diameter surface of the Bushing, surface pressure can be obtained by dividing the load applied to Bushing by the projected area (Bushing inner diameter x length). Please design it within the allowable maximum surface pressure.
Also, please consider on other criteria such as maximum speed, etc.
For more details, please see the "Table of Material characteristics and allowable characteristics (reference value)" from above question
• Fixing method for Oil free Bushing
1. Press-fit
For fixing Oil free Bushing by Press-fit method, please use vise or press machine in order to gently Press-fit.
We recommend to provide a chamfer at the end of the inner diameter of the housing and inner housing, and apply a few lubricant at the outer of Bushing to facilitate Press-fit.
2. Set screw/ Adhesion
For anti-rotation and falling prevention of Oil free Bushing, we recommend to mounting by follow the below diagram, please adapt it according to your operating condition and environment. ※2
In an environment where it is exposed to water droplets. Which one is better against corrosion?
In case of Copper alloy Bushing and washer, if shaft and bushing are exposed to water droplets all the times, the lubricant film between shaft and bushing will be flow out which will may enhance more friction resistance.
Dry type Bushing and washer are filled with Tetrafluoroethylene resin layer at inner side, so even exposed to many droplets, it will not effect to lubrication performance but the end surface is easily to be corroded. If it exposed to many droplets, we recommend to use the Tetrafluoroethylene resin type Oil free Bushing.
• Oil Free Bushings - Straight (Polyacetal Resin)
• Oil Free Bushings - Flanged (Polyacetal Resin)
• Oil Free Resin Washers
Those oils come from filled lubricant inside product or rust-protective oil applied before shipping.
Flanged type does not have lubricant inside the surface of flange.
Thrust type has lubricant inside the surface of flange, so it is available to receive both radial load and thrust load at the same time.
Please see more details on the some application （No.000091 Large automatic door ）at inCAD Library
Surface pressure can be obtained by projected area, calculated by "Load ÷Bushing inner diameter ×Bushing length"
However, it must be confirmed that Surface pressureＰ, speed Ｖ, andＰＶ value（multiple result of Ｐ and Ｖ）must not exceed the allowable value.
For using Oil free Bushing with small traveling distance, we recommend to use Bronze type which are bronze casting with many porous casting for lubrication with lubricant.
Bronze type:
• Oil Free Bushings - Bronze, Straight, I.D. F7 O.D. m6
• Oil Free Bushings - Bronze, Flanged
• Oil Free Bushings - Bronze, Standard Flanged Housing Units - Compact Flange
Since inner diameter of Bushing is g6 tolerance, it is designed for small inner diameter specification. Using in combination with g6 tolerance shaft can realize the small gap.
1. Does the similar shape product available?
2. Does it satisfy your operating condition?
• Oil free Bushing selection process
Can I order it?
Replacement product is Model No. MD□□.
Can I order it?
Replacement product is Model No. MFMS-S16 Oil Free Bushing Housing Units - Standard Flanged - Standard - Built-In Copper Alloy Bushings, Single / Double
Dimension and tolerance displayed on website are the same, only material is difference (S45C)
Automation Components
- Linear Motion
- Linear Shafts
- Shaft Supports
- Shaft Collars
- Linear Bushings
- Ball Guides
- Spline Shaft
- Oil Free Bushings, Washers
- Linear Motor Actuators
- Oil Free Plates, Guide Rails
- Linear Guides
- Cable Carriers
- Ball Screw
- Support Units
- Lead Screws, Slide Screws
- Cross Roller
- Slide Packs, V Guides, Linear Rails
- Actuators/Single Axis Robot
- Other Linear Motion Related Components
- Bellows
- Rotary Motion
- Connecting Parts
- Rotary Power Transmission
- Motors
- Conveyors & Material Handling
- Locating, Positioning, Jigs & Fixtures
- Inspection
- Sensors, Switches
- Pneumatics, Hydraulics
- Vacuum Components
- Hydraulic Equipment
- Discharging / Painting Devices
- Pipe, Tubes, Hoses & Fittings
- Modules, Units
- Heaters, Temperature Control
- Framing & Support
- Casters, Leveling Mounts, Posts
- Doors, Cabinet Hardware
- Springs, Shock Absorbers
- Adjusting, Fastening, Magnets
- Antivibration, Soundproofing Materials, Safety Products
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- Credit Card
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- Cheque on delivery
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- Online payment
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