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SANKYO OILLESS INDUSTRY,INC.
Bush (Drystar) Lead Free, Straight type

Bush (Drystar) Lead Free, Straight type

Product catalog summary

Overview
This document provides technical specifications and guidelines for the RoHS-compliant, lead-free, oilless bushings known as Drystar, specifically the Straight Type SO#936FR. These bushings are designed for high performance in various applications, offering excellent self-lubrication and wear resistance.

Features

Constructed with a sintered bronze powder layer on a steel back plate, enhanced with polytetrafluoroethylene (PTFE) for low friction and special fillers for improved lubrication.
Lead-free, suitable for use without additional lubrication.
High performance under high load and impact conditions, with excellent wear resistance and long lifespan.
Suitable for both sliding and continuous motion, minimizing stick-slip and ensuring silent operation.

Operational Range

Maximum allowable load: 519 N/mm².
Temperature range: -200°C to +280°C.
Suitable for very slow movements, rotations, oscillations, or sliding with load changes up to 10 million times.

Physical Properties

Compression strength: 240 MPa.
Linear expansion coefficient: 31 × 10^-6/°C.
Thermal conductivity: 140 W/(m·K) parallel to the bearing surface, 3 W/(m·K) vertical to the bearing surface.

Precautions for Use

Avoid grinding the inner or outer surfaces to alter size.
Ensure the mating surface is polished to better than 3 µmRmax.
Offset the bushing joint from the maximum load point.
Press fit the bushing vertically into the housing without requiring a special lock.
Initial lubrication can extend product life.

Dimensions and Tolerances

Detailed dimensions and tolerances for press-fit bushings are provided, including formulas for calculating maximum press-fit force.
Specific guidelines for housing and shaft dimensions, including chamfering procedures, are outlined.

Conclusion
The Drystar SO#936FR bushings are designed for high-performance applications requiring lead-free, self-lubricating components. They offer significant advantages in terms of wear resistance, operational range, and ease of use, making them suitable for a wide range of industrial applications.

Catalog excerpts

Bush (Drystar) Lead Free, Straight type-1

DryStar SO#936FR(Lead Free Type) Outline It is the bearing which has sintered porosity of bronze powder on the steel back plate, with improved self-lubrication and wear resistance by adding polytetrafluoro-ethylene (PTFE), which has small friction coefficient, and special filler through impregnation. • Lead-free bearing which can be used without lubrication. • Excellent sliding performance under high load and impact • Excellent in wear resistance and long life. • Suitable for sliding motion and continued motion • Stick-slip hardly occurs. Silent operation can be achieved. Operation Range • Do not grind the bushing inner surface or the outer diameter to change the size. • Polish the surface of the mating surface to the value better than 3 /L/mRmax. • Offset the joint of the bushing as far as possible from the maximum load point. "To press fit the bushing, press fit it vertically into the • Special lock is not required for Drystar. • Initial lubrication can make the product life longer. 0 Tolerance I.D. after press-fit is applicable to used as reference. Copyright © Sankyo Oilless Industry, Inc. All Rights Reserved.

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Bush (Drystar) Lead Free, Straight type-2

Lead Free Housing I.D. H7 Shaft Diameter Operation Range Max. Allowable Load P N/mm Very Slow Movement Rotation, Oscillation or Sliding Change of Load 100,000 Times or Less Change of Load 10 million Times or More Operation Range Temperature ˚C Lubricating Condition Shaft Dimension of Bushing O.D. Tolerance Tolerance I.D. after press-t O.D. Tolerance Thickness T Tolerance Physical Properties Linear Expansion Coefcient ×10−6/˚C Parallel to Bearing Surface Vertical to Bearing Surface Shaft Dimension of Bushing O.D. Tolerance Tolerance I.D. after press-t O.D. Tolerance Thickness T Tolerance 9 Tolerance...

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Bush (Drystar) Lead Free, Straight type-3

Very Slow Movement Rotation, Oscillation or Sliding Change of Load 100,000 Times or Less Change of Load 10 million Times or More Linear Expansion Coefcient ×10−6/˚C Parallel to Bearing Surface Vertical to Bearing surface 11 Shaft Dimension of Bushing O.D. Tolerance Tolerance I.D. after press-t O.D. Tolerance Thickness T Tolerance Physical Properties Operation Range Temperature ˚C Operation Range Lubricating Condition Shaft Dimension of Bushing O.D. Tolerance Tolerance I.D. after press-t O.D. Tolerance Thickness T Tolerance Lead Free Shaft Diameter Resin Sliding Materials Lead Free Straight Type...

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Bush (Drystar) Lead Free, Straight type-4

OILLESS BUSHINGS Lead Free Straight Type Catalog No. Tolerance I.D. after press-t is applicable to used as reference. Housing Diameter Shaft Diameter Sliding Direction Material 936FR Operation Range Max. Allowable Load P N/mm Very Slow Movement Rotation, Oscillation or Sliding Change of Load 100,000 Times or Less Change of Load 10 Million Times or More Operation Range Temperature ˚C Lubricating Condition Physical Properties Linear Expansion Coefcient ×10−6/˚C Parallel to Bearing Surface Vertical to Bearing Surface Shaft Dimension of Bushing O.D. Tolerance Tolerance I.D. after press-t O.D. Tolerance...

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