Pillow Blocks
Sealmaster NP-31TC
Sealmaster Mounted Cast Iron Two Bolt Pillow Block Ball Bearing - 52100 Bearing Steel, Black Oxided - Concentric Lock - NP-31TC
NP-31 is also available as
Dynamic Load Rating (lb)
7,889
Rolling Element
Ball Bearing
Housing Base
Solid
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
- Skwezloc™ concentric locking for near perfect concentricity
- 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 | 2 1/4 | 57.2 |
| B | Base Length | 8 1/8 | 206.4 |
| C | Bolt Spacing Min | 6 | 152.4 |
| C (max) | Bolt Spacing Max | 6 1/2 | 165.1 |
| D | Base Width | 2 3/8 | 60.3 |
| G | Foot Height | 3/4 | 19.1 |
| H | Overall Height | 4 9/16 | 115.9 |
| J | 2 3/32 | 53.2 | |
| K | 1 11/32 | 34.1 |
Values as printed for NP-31T, the base part of NP-31TC; the options in this part number do not change the housing. Verify critical dimensions before ordering.
- Rolling Element
- Ball Bearing
- Housing Base
- Solid
- Bore Shape
- Straight
- Overall Height (in)
- 4.56
- Overall Length (in)
- 8.13
- Base Width (in)
- 2.38
- Overall Width (in)
- 2.38
- Bolt Size (in)
- 5/8
- Housing Construction
- One Piece
- Outer Ring Land Profile
- Standard
- Misalignment Type
- Static Only
- Housing Color
- Black
- Bore Size - Inch
- 1.9375Shaft size chart
- Foot Height (in)
- 0.75
- Base to Center Height (in)
- 2.2500
- Cage Material
- PPS - Polyphenylene Sulfide
- Length Through Bore (in)
- 2.09
- 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
- Locking Collar Outside Diameter (in)
- 3.38
- Static Load Rating (lb)
- 5,216
- Centerline to Outermost Bearing Face (in)
- 1.34
- Maximum Speed (RPM)
- 3550
- Shaft Locking Type
- Concentric
- Bolt Spacing Min (in)
- 6
- Cage Type
- Land Riding Retainer
- Housing Material
- Cast Iron
- Size Code
- 2-115
- Bearing Type
- Standard Duty
- Bearing Insert Material
- 52100 Bearing Steel
- Misalignment Capability
- ±2.0° Misalignment - Static Only
- Grease Fitting Thread Size
- 1/8 NPT
- Vibration Frequency Fundamental Train
- 0.0068
- End Cap Available
- No
- Bearing Insert Finish
- Black Oxide
- Dynamic Load Rating (lb)
- 7,889
- Lubricant
- Lithium Complex NLGI 2 Grease
- Housing Coating
- Powder Coated
- Fixed vs. Expansion
- Fixed
- Radial Clearance
- Standard
- Max Operating Temperature (F)
- 220
- Vibration Frequency Roller Spin
- 0.0445
- Bolt Spacing Max (in)
- 6.5
- Vibration Frequency Outer Ring Defect
- 0.0683
- Base Length (in)
- 8.13
- Vibration Frequency Inner Ring Defect
- 0.0984
- Inner Ring Outside Diameter (in)
- 2.469
- Duty/Series
- Standard
- Optional Seal
- Contact
- Operating Temperature Range (F)
- -20° to 220°F
Always verify dimensions, load ratings, material, and seal type before ordering.
- Brandi
- Sealmaster
- Mfg. Catalog Numberi
- NP-31TC
- Mfg. Part Numberi
- 705763
- GDS #i
- GDS-117106
- Categoryi
- Pillow Blocks
- UPCi
- 662461032800
- Inserti
- 2-115TC
NP-31 options
| Part # | Configuration | Price | View |
|---|---|---|---|
| NP-31 | Base configuration | $196.01 | View |
| NP-31C | Contact seal | $261.35 | View |
| NP-31T | Skwezloc concentric locking collar | $241.84 | View |
| NP-31TCThis part | Skwezloc concentric locking collar, contact seal | $277.60 | |
| NP-31 CXU | Air-handling housing fit, noise tested | $225.55 | View |
| NP-31 DRT | High-contamination seal | $599.24 | View |
| NP-31 HI | High-performance high temperature | $457.18 | View |
| NP-31 HT | High temperature | $411.32 | View |
| NP-31 LO | Low drag | $462.40 | View |
| NP-31 VL | — | $243.17 | View |
| NP-31C RM | Contact seal, Reduced maintenance | $313.71 | View |
| NP-31H RM | High-performance seal, Reduced maintenance | Request quote | View |
| NP-31T CXU | Skwezloc concentric locking collar, Air-handling housing fit, noise tested | $294.90 | View |
| NP-31T HT | Skwezloc concentric locking collar, High temperature | $697.35 | View |
Bearing insert used in this unit
| Part # | Name | Each |
|---|---|---|
| 705321 | 2-115T | $186.18 |
Common Questions
Is this a genuine Sealmaster part?
Yes. GDS Supply supplies the genuine Sealmaster NP-31TC, manufacturer article number 705763. Its UPC is 662461032800.
