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FZ21 Bronze Oil Sintered Powder Metallurgy Bearing and Components

Standard: SPB Oilites
Code: FZ21
Type: Bronze Base
Applications: Bearings or Mechanism Parts
Product description: The FZ21 is a bronze base (CuSn6Zn6Pb3) oil-impregnated sintered powder metallurgy bearing and component set, compliant with SPB Oilites standards. This self-lubricating bronze bearing is ideal for in
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FZ21 Bronze Base (CuSn6Zn6Pb3) Sintered Bearing Material

FZ21 is a bronze (CuSn6Zn6Pb3) base, oil-impregnated sintered self-lubricating bearing material per SPB Oilites standard. Also known as Cu663 or SAE660 bronze. Offers excellent conformability and embedability, ideal for soft shaft applications in HVAC, electrical fans, and general industrial equipment.

Chemical Composition (SPB Oilites / ISO 2795 (DIN 1850 Part 3))

Element	Content
Cu	Balance
Sn	5.5~7.0%
Zn	5.0~7.0%
Pb	2.0~4.0%
Other	≤1.5%

Mechanical & Physical Properties

Property	Value
Oil Retaining	12%~18%
Radial Crushing Strength	>150 MPa (at 18% oil), >200 MPa (at 12% oil)
Max. Linear Speed	4 m/s
Max. PV	8 N/mm² · m/s
Hardness	HB 20~50

Products Standard: ISO 2795 (DIN 1850 Part 3). Radial crushing strength values are shown at corresponding oil retaining levels — higher oil content reduces crushing strength. All materials are oil-impregnated via vacuum soaking process.

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