SF-3产品简介 Introduction
SF-3系列双金属轴套、轴瓦、止推垫片，是以优质低碳钢为基体，表面烧结铅锡青铜合金或轧制铝锡合金，经多次烧结轧制而成，产品主要应用于汽车发动机连杆、摇臂、变速箱齿轮、汽车转向节、钢板弹簧、工程机械、农业机械等。SF-3
series bimetal cylindrical bushes、half bearing、thrust
washer is sintered and rolled for many times
is a bushing based on high quality, low-carbon
steel as its backing and sintered with lead,
tin and bronze alloy or rolled with aluminium
tin alloy as its surface. The products are
mainly applied in connecting rod of automobile
engine, rocker, gear-box, automobile knuckle
arm, steel plate spring, construction machinery,
agriculture machinery, etc.
SF-3轴承的合金牌号及相应代号 The alloy number and it’s
correlative code
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应用特点 Application characteristics
SF-30：有很高的耐疲劳强度和承载能力，高的抗冲击能力，很好的耐腐蚀性和耐磨性，与淬硬轴配合，轴颈强度不低于53HRC。适用于中载、中到高速，以及有大冲击载荷的轴承，机械设备上用的卷制轴承、止推垫片、内燃机连杆活塞销轴套。
SF-30：Very high fatigue
strength and load capacity, with high shock
resistance and good corrosion resistance.
When cooperated with hard shaft, the joumal
rigidity is not less than 53HRC.Fit for middle
load, middle to high speed. Suitable for wrapped
bushing and thrust washer and connecting rod
bearing in internal combustion engine used
in mechanical equipment and high shock bushings.
SF-31：有高的耐疲劳强度，承载能力，抗冲击能力，耐腐蚀，有较好的轴承表面性能（嵌藏性、顺应性、相容性），与淬硬轴配合，轴颈硬度不低于48HRC。适用于高速、摆动和旋转工作条件下的轴承，当轴承滑动表面镀有软合金层时，可用于高速、重载的内燃机主轴和连杆轴承、止推垫片、卷制轴承、轧钢机用轴承、机床轴承等。
SF-31：Very high
fatigue strength, load capacity, shock resistance
and corrosion(inlay, acclimatization and
compatibility.) When cooperated with hard
shaft, the joumal rigidity is not less than
48HRC. Fit for bushings under conditions
of high speed, oscillating or rotating motion.
When plating soft-alloy of surface of bushing,
it can be used in high load and speed internal
combustion engine, principle axis and connecting
rod bushing, thrust washer, wrapped bushing,
bushings used in steel rolling machines
and machine tol bushing etc.
SF-32：有较高疲劳强度和承载能力，较好的轴承表面性能，易受润滑油渗透，有软合金镀层时可以与硬轴或软轴配合。轴颈硬度不低于45HRC。常用于内燃机主轴和连杆轴承、止推垫片、卷制轴承等。
SF-32:Relatively
high fatigue strength and load capacity,
good performance of bushing surface and
be liable to be corrupted with lubricating
oil. It can be cooperated with hard or soft
shafts if there is soft alloy coating. Journal
rigidity is not less than 45HRC. It is mainly
used in principle axis of internal combustion
engine, connecting rod bushing, thrust washer,
wrapped bushings etc.
SF-33：有中等的疲劳强度和承载能力，良好的抗腐蚀性，较好的轴承表面性能，可以与软轴相配合，轴颈硬度不低于250HB。常用于内燃机主轴和连杆轴承、止推垫片、卷制轴承或压气机、制冷机用轴承。
SF-33:Moderate fatigue
strength and load capacity, It has good
corrosion resistance and relatively good
surface performance. It can be worked with
soft shaft with joumal rigidity being not
less than 250HB. It is mainly used in principle
axis of internal combustion engine, connecting
rod bushing, thrust washer, wrapped bushing
or bushings used in compressing and refrigerating
machine.
SF-34：有中等疲劳强度和承载能力，较好的轴承表面性能，易受润滑油渗透，轴承工作表面必须镀软合金层，相配轴颈的硬度不低于270HB。常用于内燃机主轴和连杆轴承、止推垫片、卷制轴承。
SF-34: Moderate
fatigue strength and load capacity. Good
surface performance. Being liable to be
corrupted with lubricating oil. The working
surface of the bushing must be plated with
soft alloy layer and its corresponding joumal
rigidity is not less than 270HB. Mainly
used in principle axis of internal combustion
engine, connecting rod bushing, thrust washer
as well as wrapped bushing.
可供标准产品：直套P23，止推垫片P17、P19，板材P17。
Provide standardized products: Cylindrical
bushes P23, thrust washers P17、P19，flat
strip material P17.
可供非标产品：直套，翻边轴套，止推垫片，板材，轴瓦，滑板，钢套组合件。
Provide non-standardized products: Cylindrical
bushes, flanged bushes, thrust washers,
flat strip material, half bearing, wear
plate, SF-3 with steel bush.
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