UCF 317: 4-Bolt Square Flange Ball Bearing Unit

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UCF 317 Bearing Unit Overview

UCF317 bearing units are 85 mm bore bearing units with a square flange housing, four mounting holes, and two set screws for shaft locking. They are suitable for replacing equivalent branded models and are designed for heavy-duty applications.

UCF 317 Bearing Unit Specifications

Model No.	UCF317
Product Type	4-Bolt Square Flange Ball Bearing Unit
Series	UCF300 Series
Insert Bearing Number	UC317
Housing Number	F317
Rolling Element Type	Ball
Mounting Type	4-Bolt Square Flange Mount
Number of Mounting Holes	4
Locking Method	Set Screw Locking
Number of Set Screws	2
Bore Diameter / Shaft Diameter	85 mm
Overall Length	260 mm
Overall Width	260 mm
Housing Height / Base Thickness	74 mm
Mounting Hole Center Distance	204 mm
Mounting Hole Diameter	31 mm
Flange Thickness	27 mm
Bearing Center Distance from Mounting Surface	44 mm
Total Projection from Mounting Surface	100 mm
Insert Bearing Inner Ring Width	96 mm
Mounting Bolt Size	M27
Basic Dynamic Radial Load Rating, Cr	133 kN
Basic Static Radial Load Rating, C0r	96.5 kN
Fatigue Load Limit, Pu	3.55 kN
Limiting Speed	Up to 2,050 rpm with h6 Shaft Tolerance
Bearing Ring Material	SAE 52100 / GCr15 Bearing Steel
Ball Material	SAE 52100 / GCr15 Bearing Steel
Cage Material	Pressed Steel
Housing Material	Cast Iron
Seal Type	Contact Seals with Flingers on Both Sides
Lubrication	Grease
Self-Aligning	Yes
Duty Type	Heavy Duty
Weight	Approx. 15 kg

FAQS for UCF 317 Bearing Units

Q1. Are UCF317 Bearing Units from Different Brands the Same Size?

In general, standard UCF317 bearing units have an 85 mm bore diameter and similar principal mounting dimensions. If you are worried, we recommend sending us your existing bearing model, brand, drawing, or measured dimensions so BKZ Industry can confirm interchangeability before you order.

Q2. What Are the Differences Between UCF317, UCF317D1, and UCF317G2?

The three designations generally refer to the same basic type of 85 mm bore, four-bolt square flange bearing unit, but the suffixes are manufacturer-specific:

UCF317 is the general model designation.
UCF317D1 is an NTN designation. The suffix D1 indicates that the bearing unit has a relubrication feature.
UCF317G2 is an SNR designation. The SNR UCF317 unit consists of a UC317G2 insert bearing and an F317 housing, with set-screw locking and seals with slingers.

Q3. What Information Should I Provide to Get a Quotation for UCF317?

Please send us the bearing model, required quantity, existing brand, drawing or product photos if available, application, operating speed, load, working temperature, sealing or lubrication requirements, required certificates, and delivery destination. BKZ Industry will prepare a quotation based on the information provided.

Q4. Is UCF317 Manufactured In-House by BKZ Industry?

Yes. BKZ Industry manufactures UCF317 bearing units in-house, allowing us to control product quality, production schedules, and bulk-order costs.

Q5. Does BKZ Industry Manufacture Other Sizes in the UCF Series?

Yes. BKZ Industry specializes in insert bearings, bearing housings, and mounted bearing units. We manufacture UCF bearing units in a wide range of bore sizes and can also provide other mounted-bearing series, including UCP, UCFL, UCT, UCFC, and customized bearing units.

Other Products from BKZ Industry

In addition to UCF317, BKZ Industry also manufactures other bearing units, insert bearings, bearing housings, deep groove ball bearings, tapered roller bearings, spherical roller bearings, and cylindrical roller bearings. We also work with partner factories to supply other bearings that we cannot manufacture ourselves.