Pillow Blocks
Sealmaster NP-23C
Sealmaster Mounted Cast Iron Two Bolt Pillow Block Ball Bearing - 52100 Bearing Steel, Black Oxided - Setscrew Lock - NP-23C
NP-23 is also available as
Dynamic Load Rating (lb)
5,782
Housing Base
Solid
Rolling Element
Ball Bearing
Bore Shape
Straight
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 , dimple for direct lubrication and anti-rotation
Dimensions
| Dim. | Meaning | in | mm |
|---|---|---|---|
| A | Base to Center Height | 1 7/8 | 47.6 |
| B | Overall Length | 6 9/16 | 166.7 |
| C | Bolt Spacing Min | 4 11/16 | 119.1 |
| C (max) | Bolt Spacing Max | 5 5/16 | 134.9 |
| D | Base Width | 1 7/8 | 47.6 |
| G | Foot Height | 5/8 | 15.9 |
| H | Overall Height | 3 3/4 | 95.3 |
| J | Length Through Bore | 1 11/16 | 42.9 |
| K | Centerline to Outermost Bearing Face | 1 | 25.4 |
| L | Inner Ring Outside Diameter | 1 55/64 | 47.2 |
Values as printed for NP-23, the base part of NP-23C; the options in this part number do not change the housing. Verify critical dimensions before ordering.
- Housing Base
- Solid
- Rolling Element
- Ball Bearing
- Bore Shape
- Straight
- Overall Length (in)
- 6.56
- Overall Height (in)
- 3.75
- Base Width (in)
- 1.88
- Overall Width (in)
- 1.88
- Housing Construction
- One Piece
- Bolt Size (in)
- 1/2
- Outer Ring Land Profile
- Standard
- Misalignment Type
- Static Only
- Bore Size - Inch
- 1.4375Shaft size chart
- Housing Color
- Black
- Foot Height (in)
- 0.63
- Base to Center Height (in)
- 1.875
- Cage Material
- PPS - Polyphenylene Sulfide
- Length Through Bore (in)
- 1.685
- Seal Type (Product Selection)
- Single Lip Contact Seal
- Housing Type (Product Selection)
- Pillow Block, Two Bolt
- Housing Style
- Pillow Block
- Ability to Relubricate
- Yes
- Inner Race Heat Treat Method
- Zone-Hardened
- Vibration Frequency Inner Ring Defect
- 0.0905
- Housing Coating
- Powder Coated
- Radial Clearance
- Standard
- Bearing Insert Finish
- Black Oxide
- Grease Fitting Thread Size
- 1/4-28
- Misalignment Capability
- ±2.0° Misalignment - Static Only
- Bearing Type
- Standard Duty
- Size Code
- 2-17
- Bolt Spacing Max (in)
- 5.31
- Maximum Speed (RPM)
- 4650
- Vibration Frequency Roller Spin
- 0.0386
- Bolt Spacing (in)
- 5
- Cage Type
- Land Riding Retainer
- Bolt Spacing Min (in)
- 4.69
- Static Load Rating (lb)
- 3,493
- Base Length (in)
- 6.56
- Vibration Frequency Outer Ring Defect
- 0.0595
- Housing Material
- Cast Iron
- Centerline to Outermost Bearing Face (in)
- 1
- Bearing Insert Material
- 52100 Bearing Steel
- Max Operating Temperature (F)
- 220
- End Cap Available
- No
- Lubricant
- Lithium Complex NLGI 2 Grease
- Shaft Locking Type
- Set Screw
- Inner Ring Outside Diameter (in)
- 1.851
- Dynamic Load Rating (lb)
- 5,782
- Vibration Frequency Fundamental Train
- 0.0066
- Fixed vs. Expansion
- Fixed
- 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
- NP-23C
- Mfg. Part Numberi
- 703255
- GDS #i
- GDS-116287
- Categoryi
- Pillow Blocks
- UPCi
- 662461020746
- Inserti
- 2-17C
NP-23 options
| Part # | Configuration | Price | View |
|---|---|---|---|
| NP-23 | Base configuration | $136.85 | View |
| NP-23CThis part | Contact seal | $136.85 | |
| NP-23T | Skwezloc concentric locking collar | $172.96 | View |
| NP-23TC | Skwezloc concentric locking collar, contact seal | $192.98 | View |
| NP-23 CXU | Air-handling housing fit, noise tested | $161.51 | View |
| NP-23 DRT | High-contamination seal | $357.43 | View |
| NP-23 HI | High-performance high temperature | $339.15 | View |
| NP-23 HT | High temperature | $291.58 | View |
| NP-23 HTC | High temperature, contact seal | $879.70 | View |
| NP-23 RM | Reduced maintenance | $264.67 | View |
| NP-23 VL | — | $188.32 | View |
| NP-23C RM | Contact seal, Reduced maintenance | $221.49 | View |
| NP-23T CXU | Skwezloc concentric locking collar, Air-handling housing fit, noise tested | $198.55 | View |
| NP-23T DBB | — | Request quote | View |
| NP-23T HI | Skwezloc concentric locking collar, High-performance high temperature | $572.62 | View |
| NP-23T HTC | Skwezloc concentric locking collar, High temperature, contact seal | $893.39 | View |
| NP-23T LO | Skwezloc concentric locking collar, Low drag | $1,009.08 | View |
| NP-23TX ALP | — | Request quote | View |
Bearing insert used in this unit
| Part # | Name | Each |
|---|---|---|
| 700024 | 2-17 | $191.01 |
Common Questions
Is this a genuine Sealmaster part?
Yes. GDS Supply supplies the genuine Sealmaster NP-23C, manufacturer article number 703255. Its UPC is 662461020746.
