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SKF / CR Seals (formerly CR Seals) F4B 203-FM is a mounted unit ball bearing in a 2-bolt flange block configuration. It features a set screw locking mechanism for secure shaft mounting. Designed for industrial applications requiring reliable radial and axial load support. The unit includes a precision ball bearing insert with a durable housing for long service life.
MODEL F4B 203-FM
$130.73 Each
Prices are subject to change
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Typically Ships in: 1 day
Returnable: See conditions
Application
For material handling applications
Attachment Bolt Diameter
15.875 mm
Basic Dynamic Load Rating
43.6 kN
Basic Static Load Rating
29 kN
Bearing Material
Bearing steel
Bearing Sealing
Seal on both sides
Bore Type
Cylindrical
Centre Distance Between Bolt Holes
130.2 mm
Coating
Without
Fastening Bolt Hole Type
Plain
Flanged Housing Type
Square
Grease Fitting
With
Hexagonal Key Size for Set Screw
5.556 mm
Housing
Cast iron
Housing Overall Width
50 mm
Housing Type
Flanged
Inner Ring Retaining Feature
Eccentric collar
Limiting Speed
3600 r/min
Lubricant
Grease
Number of Bolt Holes for Fasteners
4
Pack Height
72 mm
Pack Length
168 mm
Pack Width
168 mm
Relubrication Hole
With
Rubber Seating Ring
Without
Sealing Type
Contact, standard
Set Screw
7/16-20 UNF
Set Screw Tightening Torque
28.5 N·m
Shaft Diameter
55.5625 mm
Total Bearing Width
48.4 mm
Total Width
67.9 mm
Unit Sealing
Optional end cover
Square flange ball bearing unit with narrow inner ring and eccentric locking collar, cast iron housing, North American standards
These square flanged ball bearing units are compliant with North American standards. They consist of an insert bearing, with a narrow inner ring and eccentric locking, intended primarily for use in applications where the direction of rotation is constant. The bearing is mounted in a cast iron housing, which can be bolted to a machine wall or frame. Ball bearing units can accommodate moderate initial misalignment, but normally do not permit axial displacement.
- Resist high levels of contamination
- Designed for high temperatures and speeds
- Accommodate relatively heavy loads
- Cost-effective
SKU: 1907550
Great service and product!
Doing boat repairs is trying at best when you are on the hard. While the clock tics by , the dollars add up. Being able to find, order and receive part in a timely fashoin is a tall order and MRO Supply was able to meet all of our needs! Great job MRO! We'll be back!
Read moreSKU: 1898386
Small diameter seals
I use a lot of small diameter inch dimension seals for the repair of older chainsaws. MRO is a great resource for many seals with very competitive prices and free shipping for larger orders. I will continue to use MRO whenever I can.
Read moreSKU: 1898441
Mro supply - seals
I use a lot of the SKF6119 seals for chainsaw repairs and MRO always has the best prices and fast shipping.
Read moreHow do I choose the right type of bearing for my application?
Start with the load and how it’s applied. You need to know if you’re dealing with radial loads, axial loads, or a mix of both. Then look at speed, operating environment, and space constraints. For example, ball bearings are great for high speed and lighter loads, while roller bearings handle heavier loads but usually at lower speeds. If there’s contamination, moisture, or heat involved, you may need sealed bearings or specific materials. In most cases, the right choice comes down to matching load type, speed, and environment to the bearing design.
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SKU: 1907550
Great service and product!
Doing boat repairs is trying at best when you are on the hard. While the clock tics by , the dollars add up. Being able to find, order and receive part in a timely fashoin is a tall order and MRO Supply was able to meet all of our needs! Great job MRO! We'll be back!
Read moreSKU: 1898386
Small diameter seals
I use a lot of small diameter inch dimension seals for the repair of older chainsaws. MRO is a great resource for many seals with very competitive prices and free shipping for larger orders. I will continue to use MRO whenever I can.
Read moreSKU: 1898441
Mro supply - seals
I use a lot of the SKF6119 seals for chainsaw repairs and MRO always has the best prices and fast shipping.
Read moreDisclaimer: The return policy information shown below is merely an excerpt from SKF's General Conditions of Sale.
RETURN OF GOODS FOR CREDIT
Goods will not be accepted for return without prior written approval from SKF. The return freight must be prepaid by the Buyer. Unless return of Goods is due to Supplier error, Goods returned will be subject to a credit service fee of $25.00 or 15% of the credit value, whichever is greater. An additional service fee may apply is further inspection is required at the discretion of SKF