NSKASFD205Two-Bolt Rhombus Flange Bearing Unit – 25 mm Bore, Cast Iron Housing, Set Screw Lock, Contact Seals, Light Duty, Non-Expanding

Product Description

What this part is

ASFD205 two-bolt rhombus flange bearing unit. A complete unit: an AS205 wide-inner-ring ball bearing insert already fitted into a one-piece FD205 cast iron flange housing. Bore: 25 mm, cylindrical. Locking Method: set screws in the extended inner ring. Country of origin: Japan.

Decoding the designation

AS — wide-inner-ring ball bearing insert with a cylindrical bore and set-screw locking. FD — two-bolt rhombus (diamond) flange housing, one-piece cast iron. 205 — the size code: 25 mm bore. Insert number: AS205. Housing number: FD205. Searchable forms: ASFD-205, ASFD 205, AS205, FD205.

Housing style and bolt pattern

Two bolt holes on a rhombus flange, arranged on a diagonal. Bolt Centre To Centre: 76.0 mm (2.9844 in). Bolt hole diameter N: 10.0 mm. Overall flange height H: 95.0 mm. Flange face length L: 71.0 mm. Flange thickness A2: 9.5 mm. The flange bolts to a face perpendicular to the shaft axis, so the unit locates a shaft through a plate or gearbox wall rather than off a base.

What these specs mean in practice

Dynamic Load Rating: 14.0 kN (3,147 lbf). Static Load Rating: 7.85 kN (1,765 lbf). Maximum rotational speed on grease: 5,900 rpm. Internal Clearance: CN. Precision Rating: ISO Class 0. Operating temperature range: -40 to 120 °C. Nitrile rubber contact seals both sides keep grease in and contamination out on light-duty conveyor and fan drives. The unit is relubricatable, so it takes a grease charge in service. Non-expanding: the insert is fixed axially, so the unit acts as the locating bearing on a shaft.

Quantity and configuration

Three pieces, each a complete flange unit with the insert already assembled in its housing. Weight 1.100 lb (0.500 kg) each.

Fitting notes

Shaft: 25 mm, plain and unstepped. Inner ring width B: 27.0 mm; the extended inner ring gives the set screws a long grip length on the shaft. Outer ring width: 20.0 mm. Set the shaft position, then tighten the two set screws at 120° to each other. Balls are through-hardened steel; the cage is pressed steel.

Interchange guidance

SKF PF 25 TF and FAG FG16205 are the equivalent 25 mm bore two-bolt flange units. ASFD205-100 is the same housing and insert family at a 1 inch bore, so it is a related size. UCFL205 is the two-bolt oval flange equivalent at the same 25 mm bore, with a different bolt pattern.