NTNUKFS309D1Four-Bolt Square Flange Mounted Ball Bearing Unit, Cast Iron – 45 mm Tapered-Bore Insert, Adapter Sleeve Mount, 53 kN Dynamic

Product Description

What this part is:

NTN UKFS309D1 mounted ball bearing unit. Manufacturer: NTN Corporation. Part Number: UKFS309D1. Type: 4-bolt square flanged unit. Bearing Number: UK309D1. Housing Number: FS309D1. Bearing Type: ball bearing. Locking Device: adapter sleeve. Insert Bore: 45 mm nominal, 1:12 taper. Unit Quantity: 1 Pc. Cast iron four-bolt square flange housing with its UK309D1 tapered-bore insert and contact seals. The adapter sleeve, locknut and lockwasher are separate catalogue items.

Decoding the designation:

UK — insert with a 1:12 tapered bore, mounted by adapter sleeve.

FS — NTN heavy-section cast iron four-bolt square flange housing.

309 — 300-series housing size, insert tapered bore 45 mm nominal.

D1 — NTN housing/spec suffix.

Specifications:

Housing Material: cast iron. Housing Construction: 1 piece. Seal Type: contact. Seal Material: nitrile rubber. End Type: open. Performance Class: heavy duty. Dynamic Load Rating: 53.0 kN (11,900 lbf). Static Load Rating: 32.0 kN (7,200 lbf). Weight: 8.40 lb (3.80 kg). Operating Temperature Range: -40 to +250 °F (-40 to +120 °C). Lubrication: relubricatable through the housing grease fitting. Number Of Rows: 1. Rolling Elements: steel balls. Design Units: Metric. GTIN: 4547359238679. Country of Origin: Japan.

Dimensions and mounting:

Housing Style: four-bolt square flange, cast iron, one-piece, in NTN’s heavy-section FS series. Bolt Count: 4. Bolt Hole Spacing: 4.9219 in (125 mm). Bolt Hole Diameter: 0.7500 in (19 mm). Overall Flange Dimension: 6.3125 in (160 mm). Height H3: 4.9213 in (125 mm). Housing Width B1: 1.9690 in (50 mm). Flange Thickness F: 0.2913 in (7.4 mm). Dimension A: 1.7344 in (44 mm). Dimension A0: 2.1406 in (54.500 mm). Dimension A1: 0.7188 in (18 mm). Dimension A2: 0.5469 in (14.000 mm). Dimension A3: 0.4375 in (11 mm). Insert Bore: 45 mm nominal on a 1:12 taper. The tapered bore seats on an adapter sleeve, and the sleeve fitted sets the shaft size. NTN catalogues UKFS309D1 against three sleeves: H2309 for a 40 mm metric shaft, HA2309 for an inch shaft of 1.4375 in (36.513 mm), and HS2309X. NTN’s dimensional note records that the sales drawing shows the bore size without the adapter, and that the d dimension is the bore size with the adapter fitted.

Compatibility and replacement:

Four-bolt square flange units taking a UK309-pattern adapter-sleeve insert at matching flange bolt centres: NSK UKFS309 and Asahi, FYH and SNR adapter-sleeve flange units. UCFS309 is a related size in the same housing envelope carrying a straight 45 mm bore insert with setscrew locking, so it fits a 45 mm shaft directly and locks by a different method. UKFL309 and UKF309 carry the same insert in two-bolt oval and standard square flange housings, and UKP309 is the pillow block form. Searchable variants of the number: UKFS309D1, UKFS309, UKFS 309 D1, UKFS-309-D1, UKFS309D1+H2309X, UK309, UK309D1, 4547359238679.

Frequently asked questions:

What is the bolt pattern?

Bolt Count: 4. Bolt Hole Spacing: 4.9219 in (125 mm). Bolt Hole Diameter: 0.7500 in (19 mm). Overall Flange Dimension: 6.3125 in (160 mm).

Which shaft sizes does it fit?

The shaft size is set by the adapter sleeve fitted: H2309 for a 40 mm metric shaft, HA2309 for a 1.4375 in (36.513 mm) inch shaft, or HS2309X.

What are the load ratings?

Dynamic Load Rating: 53.0 kN (11,900 lbf). Static Load Rating: 32.0 kN (7,200 lbf).