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Sankyo Oilless Industry
Thrust Bush Split bushing:SOBBD

Thrust Bush Split bushing:SOBBD

Product catalog summary

Specifications:
The document outlines the specifications for Oilless Thrust Bushings, specifically the Split Bushing SO#50SP2. These bushings are made from a base bronze material with graphite (SP2) and incorporate a solid lubricant (GR-1). The operation range includes both no lubrication and regular lubrication with grease, suitable for atmospheric conditions. The maximum allowable load is 100 N/mm² without lubrication and 30 N/mm² with grease. The maximum sliding speed is 15 m/min without lubrication and 200 m/min with grease. The allowable PV value is 150 N/mm²·m/min without lubrication and 50 N/mm²·m/min with grease. The operation temperature range is specified up to 150°C.

Physical Properties:
The bushings have a specific gravity of 7.9 g/cm³, a hardness of 210 HB or more, an elongation of 12% or more, and a tensile strength of 755 N/mm² or more. The linear expansion coefficient is 1.9 × 10−5/°C.

Dimensions and Tolerances:
The document provides detailed dimensions and tolerances for various catalog numbers, including inner diameter (d), outer diameter (D), and length (L). It specifies tolerances for mating posts, with d8 for general use under high load, e7 for light load, and f7 for high precision. Surface roughness is specified as Ra 0.2 to 0.8 µm.

Operating Conditions and Characteristics:
The bushings can be used in atmospheric and fresh water conditions, performing well under high load and low speed. For high-temperature applications (150°C or more), the embedding specification of the solid lubricant differs, and further details should be obtained from the manufacturer.

Additional Notes:
Inner diameter tolerance is specified as F7 before press-fit and H7 after press-fit. The document also notes that the solid lubricant is not continuous for bushings with an inner diameter of 50.

Catalog excerpts

OILLESS GUIDE BUSHINGS GUIDE BUSHINGS Oilless Thrust Bush BronzeYI.D. F7YO.D. m6 Type Oilless Thrust Bush Split Bushing Mating post tolerance d8 :General use(high load) e7 :General use(light load) f7 :High precision Other operating conditions and characteristics · Can be used in the atmosphere and fresh water (on condition). · Good performance in operation under high load and at low speed. When the product is used at high temperature (150 ˚C or more), the embedding specification of solid lubricant is different. Please contact us for details. Inner diameter tolerance (in case housing hole H7) Before press-fit: F7 After press-fit: H7 t Other operating conditions and characteristics Mating post tolerance ・Tolerance · Can be used in the atmosphere and fresh 　e7 :General use(light load) water (on condition). f7 :High precision · Good performance in operation under high ・Surface raughness Ra 0.2n0.8lm load and at low speed. ・Hardness Over tempering When the product is used at high temperature (150 ˚C or more), the embedding specification of solid lubricant is different. Please contact us for details. Material Base Bronze with Graphite(SP2) Solid lubricant(GR-1) qOperation Range Environment Condition Atmosphere No lubrication Regular lubrication(Grease) Max. Allowable Sliding Speed V Max. Allowable PV value Operation Range Temperature 2 m/min N/mm Ym/min ˚C Lubricating Condition Lubricant Type Environment Condition Atmosphere Regular lubrication(Grease) Max. Allowable Sliding Speed V Max. Allowable PV value Operation Range Temperature 2 ˚C m/min N/mm Ym/min 15 qPhysical Properties qPhysical Properties Specific Gravity 3 g/cm Linear Expansion Coefficient ×10−5/˚C Linear Expansion Coefficient ×10−5/˚C Metal Sliding Materials Lubricating Condition Material Base Bronze with Graphite(SP2) Solid lubricant(GR-1) qOperation Range Lubricant Type Solid lubricant is not through only for d=50. t (Shaft Diameter)

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