Central Surplus Bearing Finder
A faster way to search our bearing inventory Today we’re launching the Central Surplus Bearing
Availability:
32 in stock
Stainless steel airframe control ball bearing, 1/4 in bore x 3/4 in OD, 9/32 in inner ring width, full ball complement, PTFE seals. NHBB KP4A special design 550.
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$32.10

32 in stock
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| MFR / Brand | NHBB |
|---|---|
| MPN | SSKP4ASD550 |
| Model | SSKP4ASD550 |
| Bearing Type | Ball Bearing, Removable PTFE seals |
| ID | 0.2500 in |
| OD | 0.7500 in |
| Width | 0.281 in (inner ring); 0.219 in (outer ring) |
| Base Number | KP4A |
|---|---|
| Mpn Variants | SSKP4ASD550, SS KP 4 A SD 550, SSKP4A-SD550, KP4A |
| Compatible With Replaces | NHBB KP4A / MKP4A base series, AS27641-4 size |
| Additional Attributes | Ball complement: 12 x 1/8 in, full complement. Inner ring width 0.281 in, outer ring width 0.219 in (extended inner ring). Special design: SD550. |
| Material | AISI 440C stainless steel |
| Cage Type | Full complement, no retainer |
| Series | KP-A |
| Rolling Elements | Ball |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Bearing Material | AISI 440C stainless steel |
NHBB SSKP4ASD550 is a stainless steel special-design execution of the NHBB KP4A intermediate-duty single-row airframe control ball bearing, with an extended inner ring. Bore Diameter: 0.2500 in. Outside Diameter: 0.7500 in. Outer ring width: 0.219 in. Inner ring width: 0.281 in.
SS — NHBB material code, AISI 440C stainless steel.
KP4A — NHBB KP-A intermediate duty single-row airframe control bearing, dash size 4 (1/4 in bore). The KP-A series is the AS27641 family; the precision version is MKP4A.
SD550 — NHBB special design number 550, assigned by NHBB engineering.
Rolling Elements: 12 balls, 1/8 in diameter, full ball complement with no retainer. Closure Type: Removable PTFE seals. The full complement and extended inner ring give high static capacity in a compact oscillating control-linkage bearing and remove the need for separate spacers.
Bore Type: Straight. Outer ring width: 0.219 in. Inner ring width: 0.281 in, extended beyond the outer ring faces.
Unit Quantity: 1 Pc. Number Of Rows: 1.
Base series: NHBB KP4A / MKP4A, AS27641-4 size. The SD550 special design and 440C material are specific to this execution.
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A faster way to search our bearing inventory Today we’re launching the Central Surplus Bearing
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Our team can locate, cross-reference, and source all parts.
Our team can locate, cross-reference, and source all parts.
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