Stamped Steel Bearing Units

Stamped steel bearing units (SBPP, SAPP, SBPFL, SAPFL, SBPF, SAPF and similar) use a two-piece pressed steel plate housing. They are lighter, more compact, and less expensive than cast iron equivalents at the same bore size. However, pressed steel housings have lower rigidity and load capacity, and are only available to 40 mm bore. Cast iron units (UCP200, UCF200, UCFL200) use a rigid one-piece housing with higher load ratings and a wider bore range (12–140 mm standard duty). Choose stamped steel for light-duty, low-to-medium speed positions in agricultural, textile, and packaging equipment where low cost and light weight are priorities. Choose cast iron for industrial drives where load capacity, rigidity, and bore range are more important.

Stamped steel bearing units use SA series (eccentric collar) or SB series (setscrew) compact insert bearings. SA and SB inserts are smaller in outer diameter and width than UC series inserts at the same bore size — they are specifically designed for pressed steel housings and the light-duty cast iron SBLF/SALF, SBFW/SAFW, and SBFD/SAFD housings. SA and SB inserts are NOT interchangeable with UC inserts and cannot be fitted into UCP, UCF, or UCFL cast iron housings. Verify that the insert series (SA/SB vs UC/NA/UE) matches the housing series before ordering replacements.

The FT suffix indicates that the flange bolt holes are square (carriage bolt holes) rather than round clearance holes. Standard round holes require a bolt inserted from below with a nut tightened from above, or a bolt from above with a nut accessible from below. Square carriage bolt holes accept the square neck of a carriage bolt: the bolt is inserted from the front and the square neck locks in the hole when tightened, so only one spanner is needed on the nut at the back. This allows the housing to be bolted to a panel or frame from one side only, without access to the back of the mounting surface — common in sheet-metal frame structures and panel-mounted agricultural equipment.

SBPF200 uses an SB series setscrew insert: dual setscrew locking, bidirectional, suitable for standard speed in both rotation directions. SAPF200 uses an SA series eccentric collar insert: self-tightening under unidirectional shaft rotation, providing more secure retention than setscrew under sustained vibration on single-direction drives. SAPF200 must not be used on reversing drives — the eccentric collar releases when the shaft rotates opposite to the lock direction. For reversing or jogging drives, use SBPF200 setscrew.

Only if the bore size (12–40 mm), bolt hole pattern, and shaft-to-housing centreline height are compatible between the pressed steel and cast iron unit being replaced. In many cases the pressed steel unit will be dimensionally smaller than the cast iron equivalent at the same bore, and the bolt hole positions may not match. Pressed steel units are also rated for lower loads — verify that the reduced load rating is acceptable for the application before substituting. Direct substitution is most reliable when replacing a stamped steel unit with another stamped steel unit of the same series designation.

Standard parts: quantity-based MOQ per model number. New-client samples: 1–5 pcs at sample price for first-time buyers. Multi-model orders: aggregate orders of USD 1,500 or more across models accepted. Retail (1–2 pcs): not accepted.