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Gearmotors: What They Are and How to Size a Replacement
Many industrial loads need torque an electric motor can’t deliver on its own, at a
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32 in stock
NHBB SSKP4ASD550 KP4A special design 550 control ball bearing, 1/4 in bore, 3/4 in OD, 9/32 in inner ring, 440C stainless, PTFE seals, full complement.
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| MFR / Brand | NHBB |
|---|---|
| MPN | SSKP4ASD550 |
| Model | SS KP 4 A SD 550 |
| 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 |
| Industry Terms | KP4A control ball bearing; AS27641 bearing; stainless control bearing; sealed full complement ball bearing; extended inner ring bearing |
| Common Misspellings | NHBB SSKP4ASD55O; NHBB SSKP 4A SD550; NBBH SSKP4ASD550; SSKP4ASD 550 |
| Application Types | Control linkages; oscillating control-linkage bearings |
| Closure Type | Removable PTFE seals |
| Cross Reference 1 | NHBB KP4A - base series, no SD550 or 440C |
|---|---|
| Cross Reference 2 | NHBB MKP4A - precision version of KP4A |
NHBB SSKP4ASD550 is a stainless steel special-design execution of the NHBB KP4A intermediate-duty single-row control ball bearing, with an extended inner ring. Unit Quantity: 1 Pc.
SS — NHBB material code, AISI 440C stainless steel.
KP4A — NHBB KP-A intermediate duty single-row control bearing, dash size 4 (1/4 in bore). The KP-A series is the AS27641 family.
SD550 — NHBB special design number 550, assigned by NHBB engineering.
Bore Diameter: 0.2500 in. Outside Diameter: 0.7500 in. Outer Ring Width: 0.219 in. Inner Ring Width: 0.281 in, extended beyond the outer ring faces. Bore Type: Straight. Number Of Rows: 1. Rolling Elements: 12 balls, 1/8 in diameter. Cage Type: Full complement, no retainer. Closure Type: Removable PTFE seals. Bearing Material: AISI 440C stainless steel. Series: KP-A.
Envelope: 0.2500 x 0.7500 in, outer ring width 0.219 in, inner ring width 0.281 in.
Base series: NHBB KP4A (standard base part) and NHBB MKP4A (precision version), AS27641-4 size. The SD550 special design and 440C material are specific to this execution. Also written as SS KP 4 A SD 550, SSKP4A-SD550 and KP4A.
Bore 0.2500 in, outside diameter 0.7500 in, outer ring width 0.219 in, inner ring width 0.281 in.
SS is the NHBB material code for AISI 440C stainless steel.
SD550 is NHBB special design number 550, assigned by NHBB engineering.
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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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