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
Availability:
25 in stock
Super-precision ball bearing, 60 mm bore x 120 mm OD, 22 mm outer-ring width with an extended 26 mm inner ring, ABEC 7/9 ground for machine-tool and spindle rebuilds. Sold as 1 Pc.
List Price
$152.43
25 in stock
25 in stock
On the Shelf & Ready to Ship
On all orders
No Risk, No Hassle
Also Available From:
| MFR / Brand | Fafnir |
|---|---|
| Model | MM212K-S-2 6212 |
| Bearing Type | Ball Bearing |
| Condition | New – Open box |
|---|---|
| Total Width | 26 mm inner ring (extended) |
| Base Number | MM212K |
| Industry Terms | spindle bearing, super precision ball bearing, machine tool bearing, ABEC 7 bearing, extended inner ring bearing |
| Common Misspellings | Fafner, Faffnir, Fafnier, MM212 KS2, MM212KS20 |
| Application Types | Machine tool spindles, grinding spindles, precision index drives, boring heads |
| Condition Note | Made In USA, New Old Stock, Came In Sleeves Of 5, Extended Inner Race, 22x26mm W |
| Bore Shaft Size | 60 mm (2.3622 in) |
| Mpn Variants | MM212KS2, MM212K-S-2, MM-212-K-S-2, MM 212 K S 2, MM212KS-2 |
| Manufacturer Status | Fafnir brand now supplied under Timken |
| Number Of Rows | 1 |
| Part Number | MM212KS2 |
A Fafnir MM212KS2 super-precision ball bearing with a 60 mm bore, 120 mm outside diameter and a 22 mm outer-ring width. The inner ring is extended to 26 mm, so the inner and outer rings sit at different widths by design.
MM: Fafnir super-precision series, built to P4S tolerances (ABEC 7 dimensional, ABEC 9 running accuracy). 212: 212 size series, 60 mm bore. K: Fafnir ring-configuration letter carried on the extended-inner-ring build. S-2: factory build code retained as a search term.
Bore: 60 mm. Outside diameter: 120 mm. Outer ring width: 22 mm. Inner ring width: 26 mm (extended). Precision class: P4S, ABEC 7/9. Rolling elements: steel balls. Closure: open.
An ABEC 7/9 ground bearing holds runout tight enough for grinding spindles, boring heads and precision index drives, where a standard ABEC 1 bearing would transfer its own eccentricity straight into the workpiece. The extended inner ring gives a longer clamped land for a spacer or lock nut, which keeps the ring square under nut torque.
Supplied as 1 Pc, a single bearing. The original packing was sleeves of five, and single pieces are sold individually.
The extended inner ring makes this a dimensionally distinct build from a plain 22 mm-wide 212-series bearing. A standard-width bearing changes the clamped stack height, so it is a related size rather than an interchange.
$61.17
66 in stock
A shipping cutoff banner measures a vendor’s dock. It tells
When a motor stops running, the first instinct is to find the part that looks
From Caligula’s luxury fleet to modern factories, this is the story of how a single
When sourcing a replacement bearing, you will often find both Timken and SKF options for
Our team can locate, cross-reference, and source all parts.
Our team can locate, cross-reference, and source all parts.
Sort
Brand
Price
MPN
Categories
