store 
Central Surplus Bearing Finder
A faster way to search our bearing inventory Today we’re launching the Central Surplus Bearing
Availability:
1 in stock
Open large-bore thin-section deep groove ball bearing, 300 mm bore x 380 mm OD x 38 mm wide, with a machined brass cage. Only 40 mm of radial wall carries a 300 mm shaft, so it fits where a standard-series bearing cannot. Sold as 1 piece.
List Price
$1,972.88
1 in stock
On the Shelf & Ready to Ship
On all orders
No Risk, No Hassle
| MFR / Brand | SKF |
|---|---|
| GTIN | 7316577093677 |
| Model | 61860MA |
| Bearing Type | Deep Groove Ball Bearing |
| ID | 300 mm |
| OD | 380 mm |
| Width | 38 mm |
| Material | Steel |
|---|---|
| Base Number | 61860 |
| Industry Terms | Thin section ball bearing, large bore ball bearing, slim section deep groove, 300mm bore bearing, brass cage bearing, rotary table bearing, 618 series |
| Common Misspellings | 61860MA1, 6186 0MA, 61860 M-A, SKF61860MA, 61860AM |
| Application Types | Rotary tables and indexers, slew and swivel joints, filling and capping heads, textile and paper rolls, large fan and blower hubs |
| Bore Shaft Size | 300 mm |
| Mpn Variants | 61860-MA, 61860MA, 61860 MA, 61860-M, 61860 |
| Number Of Rows | 1 |
| Snap Ring Included | No |
| Part Number | 61860-MA |
A single-row deep groove ball bearing in the 618 large-bore thin-section series: 300 mm bore, 380 mm outside diameter, 38 mm wide, open on both sides, with a machined brass cage. Deep groove ball bearings carry radial load plus axial load in either direction. At this size the bearing is normally used as the rotating support in ring-shaped assemblies: rotary tables and indexers, swivel and slew joints, filling and capping heads, textile and paper rolls, and large fan and blower hubs.
6: single-row deep groove ball bearing.
18: dimension series 618, the very slim section and narrow width for the bore.
60: bore code, 60 x 5 = 300 mm bore.
MA: machined brass cage, outer-ring centred. M is the machined brass cage and A the outer-ring guidance.
No closure suffix: open both sides. A 2Z would be metal shields and a 2RS1 rubber contact seals.
No clearance suffix: normal (CN) radial internal clearance.
The 618 series is the thinnest standard deep groove section made. Only 40 mm of radial wall each side carries a 300 mm shaft, and the bearing is 38 mm wide. That passes a very large or hollow shaft through a compact housing and saves weight and rotating inertia in a large-diameter assembly.
What it costs is load capacity and stiffness: the ball complement is small for the diameter and the rings are slender, so the bearing is chosen for guidance and moderate load rather than heavy radial duty.
A one-piece machined brass cage is more tolerant of high speed, misalignment, marginal lubrication and elevated temperature than a pressed steel or polyamide cage, and it has no polymer temperature ceiling. It is also heavier and costlier, which is why it appears on large hard-duty bearings.
Being open, the bearing arrives without service grease. It takes lubrication on assembly and sealing from the housing, and it is not a substitute for a shielded or sealed variant that arrives pre-greased and closed. In return it relubricates freely and runs in circulating or mist oil.
Bore: 300 mm.
Outside diameter: 380 mm.
Width: 38 mm.
Radial section wall: 40 mm each side.
Dimension series: 618, large-bore thin section.
Rows: 1.
Closure: open, both sides.
Internal clearance: normal (CN).
Cage: machined brass, outer-ring centred.
Material: through-hardened bearing steel.
EAN: 7316577093677.
Sold as 1 piece, one open bearing. No shields, no seals, no snap ring, no housing.
Slender rings take the shape of what they are mounted in, so at this diameter shaft and housing roundness matter more than the bearing tolerance does.
Heat mounting temperature at 300 mm bore: approximately 80 to 100 °C.
Grease fill: approximately one third of the free internal space, with a grease rated for the running speed.
Sealing is provided by the housing; the bearing has none of its own.
Same-envelope genuine interchanges are 300 x 380 x 38 mm 618-series bearings with a machined brass cage: FAG 61860-M, NSK 61860MA and NTN 61860. A 61860 with a pressed steel cage, a 61860 MA C3 (greater clearance) or a sealed 61860-2RS1 are related parts with different cage, clearance or closure rather than drop-in equivalents. A 6060 or 16060 of the same bore is a different section entirely.
Rockwell’s own product page for the Kinetix 6000 is down
A faster way to search our bearing inventory Today we’re launching the Central Surplus Bearing
When an HMI panel goes dark or a PLC module stops communicating, the machine it
If you have ever watched a machine glide smoothly back and forth, tracing a perfect
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
