121055

View detailed technical data, stock status, and sourcing information for: 121055

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121055
Federal Supply Group
Bearings
Federal Supply Classification
3130 Mounted Bearings
National Stock Number
3130-01-139-2163
Item Name Code
30556
Assigment Date
09/27/1982 (43 years ago)

A single or multiple piece item without ball, plain or roller bearing(s). It is designed to meet various or specific conditions of mounting. For items with bearings, see bearing unit, ball; bearing unit, plain; and bearing unit, roller.

3.8906 inches nominal bolt circle diameter, 4.8750 inches nominal overall outside diameter, 0.4531 inches nominal mounting hole diameter, 2.7500 inches nominal housing diameter, 1.0000 inches nominal bore diameter

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Bolt Circle Diameter
3.8906 inches nominal
Mounting Hole Diameter
0.4531 inches nominal
Bore Diameter
1.0000 inches nominal
Overall Outside Diameter
4.8750 inches nominal
Housing Diameter
2.7500 inches nominal
Housing Length
1.0312 inches nominal
Lubrication Fitting Type
hydraulic
Rolling Element Groove Quantity
1
Alignment Type
self-aligning
Internal Fit-Up Designation
standard
Assembly Overall Length
1.4375 inches nominal
Seal Type
contact
Block Type
fixed
Shaft End Type
open
Seal Location
both ends
Collar Location
one end
Load Capability Type
radial and thrust
Features Provided
ground rolling element groove
Lubrication Fitting Angle From Horizontal Centerline
45.0 degrees nominal
Rotating Element Locking Method
setscrew locking collar
Mounting Hole Type
round, unthreaded
Material
iron cast housing
Material
rubber seal
Material
steel bearing
Style Designator
flange block

Related Parts

This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:

Part Number Name
121055 Ball Bearing Unit
SFT16C Ball Bearing Unit

FAQs

Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.

What is the FSCG of the NSN 3130-01-139-2163?
The FSCG of the NSN 3130-01-139-2163 is 3130
Does the NSN 3130-01-139-2163 have a Schedule B code assigned?
Yes, the Schedule B code is 8482991050
Does NSN 3130-01-139-2163 require demilitarization?
Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.
Does NSN 3130-01-139-2163 contain precious materials?
Item does not contain precious metal.
Does NSN 3130-01-139-2163 contain hazardous materials?
Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.
When the NSN 3130-01-139-2163 was assigned to the Federal Catalog?
It was assigned 43 years ago, on Mon, Sep 27, 1982

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