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R144 inch-series miniature ball bearing ring envelope
R144 inch-series miniature ball bearing ring envelope: bore Ø3.175, OD Ø6.35, width 2.38; one solid ring, corners rounded at r min 0.1 (NSK); no balls, retainer or shield; nominal values
Exact dimensions. True size, no tolerance added. Threads are plain cylinders at the major diameter.
STEP STL free, CC BY 4.0 (credit "Xem Studio")
Dimensions
| designation | R144 |
|---|---|
| bore d, mm | 3.175 |
| OD D, mm | 6.35 |
| width B open, mm | 2.38 |
| width B ZZ / 2RS / 2Z, mm | 2.779 |
| bore x OD (inch, as printed) | 1/8 x 1/4 |
| r min, mm | 0.1 |
| source | NSK; TFL (SKF) |
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Inch ball bearings R-series: R188, R144, R166, R2, R3, R4, R6 to R24: bore, OD, width, r + 22 ring-envelope STEP/STL files (1/8 to 1-1/2 in bore): every size, notes, mating features and sources. What are the dimensions of an R188, R144, R166, R2, R3, R4, R6 or R8 inch ball bearing: bore, OD and width, with and without shields?
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