Home / Categories / Bearings / Mounted / Mounted Ball Bearings / Flange Units / Square Flange / SF-21C
Image differs from product
Square Flange
Sealmaster SF-21C
GEN GOLD SET SCREW
Dynamic Load Rating (lb)
5,782
Bore Shape
Straight
Rolling Element
Ball Bearing
Bolt Size (in)
1/2
Need help confirming fit? Send us the current part number, shaft size, housing photo, or equipment model.
Product Overview
- Powder coated epoxy cast iron housing with extended inner ring bearings
- Zone hardened inner ring with 120° spacing setscrew locking with diamond faceted setscrews
- Single lip contact seal
- Unique land riding retainer design provides superior pocket clearance that allows for 360° grease circulation around the rolling elements resulting in better retained and utilized lubrication.
- Sealmaster® exclusive lock pin and dimple for direct lubrication and anti-rotation
Dimensions
| Dim. | Meaning | in | mm |
|---|---|---|---|
| A | 4 5/8 | 117.5 | |
| D | 1 11/32 | 34.1 | |
| G | Foot Height | 9/16 | 14.3 |
| H | Overall Height | 1 3/4 | 44.5 |
| J | Length Through Bore | 1 11/16 | 42.9 |
| L | Inner Ring Outside Diameter | 1 55/64 | 47.2 |
| M | 3 23/32 | 94.5 | |
| N | 11/16 | 17.5 | |
| T_Core | 3 5/16 | 84.1 |
Values as printed for SF-21, the base part of SF-21C; the options in this part number do not change the housing. Verify critical dimensions before ordering.
- Bore Shape
- Straight
- Rolling Element
- Ball Bearing
- Bolt Size (in)
- 1/2
- Overall Width (in)
- 4.63
- Pilot Configuration
- No Pilot
- Overall Height (in)
- 1.75
- Housing Construction
- One Piece
- Overall Length (in)
- 4.63
- Outer Ring Land Profile
- Standard
- Misalignment Type
- Static Only
- Bore Size - Inch
- 1.3125Shaft size chart
- Housing Color
- Black
- Foot Height (in)
- 0.56
- Cage Material
- PPS - Polyphenylene Sulfide
- Length Through Bore (in)
- 1.69
- Seal Type (Product Selection)
- Single Lip Contact Seal
- Housing Type (Product Selection)
- Flange, Four Bolt
- Housing Style
- Flange Block
- Inner Race Heat Treat Method
- Zone-Hardened
- Ability to Relubricate
- Yes
- Bearing Type
- Standard Duty
- Maximum Speed (RPM)
- 4650
- Shaft Locking Type
- Set Screw
- Inner Ring Outside Diameter (in)
- 1.86
- Vibration Frequency Fundamental Train
- 0.0066
- Housing Backside Inner Diameter
- 3.31
- Dynamic Load Rating (lb)
- 5,782
- Lubricant
- Lithium Complex NLGI 2 Grease
- End Cap Available
- No
- Bolt Spacing (in)
- 3.6250
- Cage Type
- Land Riding Retainer
- Bearing Insert Material
- 52100 Bearing Steel
- Grease Fitting Thread Size
- 1/4-28
- Size Code
- 2-17
- Vibration Frequency Roller Spin
- 0.0386
- Fixed vs. Expansion
- Fixed
- Radial Clearance
- Standard
- Bearing Insert Finish
- Black Oxide
- Max Operating Temperature (F)
- 220
- Vibration Frequency Inner Ring Defect
- 0.0905
- Misalignment Capability
- ±2.0° Misalignment - Static Only
- Static Load Rating (lb)
- 3,493
- Vibration Frequency Outer Ring Defect
- 0.0595
- Housing Coating
- Powder Coated
- Housing Material
- Cast Iron
- Duty/Series
- Standard
- Optional Seal
- Contact
- Operating Temperature Range (F)
- -20° to 220°F
- Dynamic Load Rating (N)
- 25,718
Always verify dimensions, load ratings, material, and seal type before ordering.
- Brandi
- Sealmaster
- Mfg. Catalog Numberi
- SF-21C
- Mfg. Part Numberi
- 703431
- GDS #i
- GDS-116339
- Categoryi
- Square Flange
- UPCi
- 662461021989
- Inserti
- 2-15
Bearing insert used in this unit
| Part # | Name | Each |
|---|---|---|
| 700022 | 2-15 | $214.79 |
Common Questions
What is the minimum order quantity for the SF-21C?
The minimum order quantity for the SF-21C is 10 units.
Is this a genuine Sealmaster part?
Yes. GDS Supply supplies the genuine Sealmaster SF-21C, manufacturer article number 703431. Its UPC is 662461021989.
Related Products
Replaces Legacy Parts
This product is a direct replacement for the following discontinued part numbers.
- 700446Sealmaster SF-21Discontinued