Motor Starters vs. Contactors vs. Overload Relays: What Each One Does and Why You Need All Three
When a motor stops running, the first instinct is to find the part that looks
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Precision spindle deep groove ball bearing, 17 x 35 x 10 mm, open, straight bore, ABEC 3 / P6 class, C1 internal clearance. Three pieces.
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| MFR / Brand | Fafnir |
|---|---|
| MPN | JM9103K |
| Model | J M 9103 K / 6003 P6 / ABEC3 / 1581198-3 |
| Bearing Type | Ball Bearing, Open |
| ID | 17 mm |
| OD | 35 mm |
| Width | 10 mm |
| Series | 9100 |
|---|---|
| Condition | New – Open box |
| Lubricant | Oil |
| Base Number | M9103K |
| Condition Note | Made In USA, New, No Box |
| Overall Width | 10 mm |
| Mpn Variants | JM9103K; JM-9103-K; J M 9103 K; M9103K; 9103K; FA51154 |
| Precision Class | ABEC 3 / P6 |
| Rolling Elements | Ball |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Internal Clearance | C1 |
| Bearing Material | Chrome steel |
| Cross Reference 1 | FAG 6003-P6 |
|---|---|
| Cross Reference 2 | NSK 6003P6 |
| Cross Reference 3 | NTN 6003P6 |
| Cross Reference 4 | Koyo 6003P6 |
| Cross Reference 5 | Timken MM9103K (related, tighter P4S class) |
| Cross Reference 6 | 6003 (related size, standard tolerance) |
Fafnir JM9103K, a precision spindle deep groove ball bearing. Bore Diameter: 17 mm. Outside Diameter: 35 mm. Overall Width: 10 mm. Rolling Elements: Ball. Number Of Rows: 1. Bore Type: Straight. Closure Type: Open. Precision Class: ABEC 3 / P6. Internal Clearance: C1. Bearing Material: Chrome steel. Series: 9100K. Base Number: M9103K.
M — Fafnir precision spindle range at P6 tolerance, one class above standard.
9103 — the 9100 light dimension series, bore code 03, which maps to the ISO 6003 envelope: 17 mm bore, 35 mm outside diameter, 10 mm width.
K — spindle deep groove construction. Conrad-type raceways carry radial load and axial load from either direction, so the bearing has no contact angle.
C1 — internal clearance two grades tighter than normal.
FA51154 — the customer drawing reference marked on the parts.
Precision Class: ABEC 3 / P6 holds bore, outside diameter and running accuracy inside a tighter band than a standard 6003, which shows as lower runout and quieter running. Internal Clearance: C1 is the tightest of the common grades and gives the closest shaft location, which suits a light, high-accuracy spindle running at modest temperature rise.
Unit Quantity: 3 Pcs. Three single-row bearings ship together. A deep groove spindle bearing is not preload-matched, so each piece stands alone.
The envelope is the ISO 6003 envelope, 17 x 35 x 10 mm. FAG 6003-P6, NSK 6003P6, NTN 6003P6 and Koyo 6003P6 are the direct tolerance-class equivalents. Timken MM9103K is the same geometry in the tighter P4S class. A standard-tolerance 6003 shares the envelope in a looser accuracy class. Searchable variants include JM9103K, JM-9103-K, J M 9103 K, M9103K, 9103K and FA51154.
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