Aurora Bearing Company
Aurora Bearing Company
901 Aucutt Rd.
Montgomery, IL 60538
Phone: 630.859.2030 • Fax: 630.859.0971
Email: customersupport@aurorabearing.com • Website: www.aurorabearing.com
Print Back
Radial ball bearings consist of an inner and outer ring with a cage containing a complement of precision balls. The standard Conrad-type bearing has a deep-groove construction capable of handling radial and axial loads from either direction in versatile designs that permit relatively high-speed operation.

In addition to standard single-row deep groove bearings, Timken offers special designs, including a maximum capacity series and an extra large (XLS) radial series bearing.

Size range: 3 mm - 600 mm (0.12 in. - 23.62 in.) bore
Fafnir® Spindle Deep Grove Ball Bearings (9100K, 200K, 300K)
Unit of Measure
1 2 3 

Part Number

Rows per Set

d - Bore

D - Outer Diameter

Bearing Width

Ce - Dynamic Radial Rating (per row)

C0 - Static Radial Rating (per row)

Limiting Speed (Grease) (per row)

Limiting Speed (Oil)

Ball Type

CADPartID

MM9110K N/A Single N/A 50 mm N/A 3.1496 in80 mm N/A 0.6299 in16 mm N/A 5440 lbf24200 N N/A 3750 lbf16700 N N/A 14900 rpm N/A 29800 rpm N/A STEEL N/A CAD Icon (for items table)
MMC9110K N/A Single N/A 50 mm N/A 3.1496 in80 mm N/A 0.6299 in16 mm N/A 5440 lbf24200 N N/A 3310 lbf14700 N N/A 17900 rpm N/A 35800 rpm N/A Ceramic N/A CAD Icon (for items table)
MM210K N/A Single N/A 50 mm N/A 3.5433 in90 mm N/A 0.7874 in20 mm N/A 8740 lbf38900 N N/A 5200 lbf23100 N N/A 14600 rpm N/A 29200 rpm N/A STEEL N/A CAD Icon (for items table)
MMC210K N/A Single N/A 50 mm N/A 3.5433 in90 mm N/A 0.7874 in20 mm N/A 8740 lbf38900 N N/A 4640 lbf20600 N N/A 17500 rpm N/A 35000 rpm N/A Ceramic N/A CAD Icon (for items table)
MM310K N/A Single N/A 50 mm N/A 4.3307 in110 mm N/A 1.0630 in27 mm N/A 15400 lbf68600 N N/A 8510 lbf37900 N N/A 13800 rpm N/A 27600 rpm N/A STEEL N/A CAD Icon (for items table)
MMC310K N/A Single N/A 50 mm N/A 4.3307 in110 mm N/A 1.0630 in27 mm N/A 15400 lbf68600 N N/A 7570 lbf33700 N N/A 16560 rpm N/A 33120 rpm N/A Ceramic N/A CAD Icon (for items table)
MM9311K N/A Single N/A 55 mm N/A 3.1496 in80 mm N/A 0.5118 in13 mm N/A 4140 lbf18400 N N/A 3160 lbf14100 N N/A N/A N/A STEEL N/A CAD Icon (for items table)
MM9111K N/A Single N/A 55 mm N/A 3.5433 in90 mm N/A 0.7087 in18 mm N/A 7050 lbf31400 N N/A 4800 lbf21400 N N/A 13500 rpm N/A 27000 rpm N/A STEEL N/A CAD Icon (for items table)
MMC9111K N/A Single N/A 55 mm N/A 3.5433 in90 mm N/A 0.7087 in18 mm N/A 7050 lbf31400 N N/A 4250 lbf18900 N N/A 16200 rpm N/A 32400 rpm N/A Ceramic N/A CAD Icon (for items table)
MM211K N/A Single N/A 55 mm N/A 3.937 in100 mm N/A 0.8268 in21 mm N/A 10800 lbf48100 N N/A 6550 lbf29100 N N/A 13300 rpm N/A 26600 rpm N/A STEEL N/A CAD Icon (for items table)
MMC211K N/A Single N/A 55 mm N/A 3.937 in100 mm N/A 0.8268 in21 mm N/A 10800 lbf48100 N N/A 5850 lbf26000 N N/A 16000 rpm N/A 32000 rpm N/A Ceramic N/A CAD Icon (for items table)
MM311K N/A Single N/A 55 mm N/A 4.7244 in120 mm N/A 1.1417 in29 mm N/A 17800 lbf79300 N N/A 10000 lbf44600 N N/A 12500 rpm N/A 25000 rpm N/A STEEL N/A CAD Icon (for items table)
MMC311K N/A Single N/A 55 mm N/A 4.7244 in120 mm N/A 1.1417 in29 mm N/A 17800 lbf79300 N N/A 8920 lbf39700 N N/A 15000 rpm N/A 30000 rpm N/A Ceramic N/A CAD Icon (for items table)
MM9112K N/A Single N/A 60 mm N/A 3.7402 in95 mm N/A 0.7087 in18 mm N/A 7340 lbf32600 N N/A 5210 lbf23200 N N/A 12500 rpm N/A 25000 rpm N/A STEEL N/A CAD Icon (for items table)
MMC9112K N/A Single N/A 60 mm N/A 3.7402 in95 mm N/A 0.7087 in18 mm N/A 7340 lbf32600 N N/A 4630 lbf20600 N N/A 15000 rpm N/A 30000 rpm N/A Ceramic N/A CAD Icon (for items table)
MM212K N/A Single N/A 60 mm N/A 4.3307 in110 mm N/A 0.8661 in22 mm N/A 13100 lbf58200 N N/A 8150 lbf36300 N N/A 12100 rpm N/A 24200 rpm N/A STEEL N/A CAD Icon (for items table)
MMC212K N/A Single N/A 60 mm N/A 4.3307 in110 mm N/A 0.8661 in22 mm N/A 13100 lbf58200 N N/A 7190 lbf32000 N N/A 14500 rpm N/A 29000 rpm N/A Ceramic N/A CAD Icon (for items table)
MM312K N/A Single N/A 60 mm N/A 5.1181 in130 mm N/A 1.2205 in31 mm N/A 20400 lbf90700 N N/A 11700 lbf51800 N N/A 11500 rpm N/A 23000 rpm N/A STEEL N/A CAD Icon (for items table)
MMC312K N/A Single N/A 60 mm N/A 5.1181 in130 mm N/A 1.2205 in31 mm N/A 20400 lbf90700 N N/A 10400 lbf46100 N N/A 13800 rpm N/A 27600 rpm N/A Ceramic N/A CAD Icon (for items table)
MM9113K N/A Single N/A 65 mm N/A 3.937 in100 mm N/A 0.7087 in18 mm N/A 7610 lbf33900 N N/A 5650 lbf25200 N N/A 11600 rpm N/A 23200 rpm N/A STEEL N/A CAD Icon (for items table)
MMC9113K N/A Single N/A 65 mm N/A 3.937 in100 mm N/A 0.7087 in18 mm N/A 7610 lbf33900 N N/A 5030 lbf22400 N N/A 13900 rpm N/A 27800 rpm N/A Ceramic N/A CAD Icon (for items table)
MM213K N/A Single N/A 65 mm N/A 4.7244 in120 mm N/A 0.9055 in23 mm N/A 14300 lbf63400 N N/A 9000 lbf40000 N N/A 11100 rpm N/A 22200 rpm N/A STEEL N/A CAD Icon (for items table)
MMC213K N/A Single N/A 65 mm N/A 4.7244 in120 mm N/A 0.9055 in23 mm N/A 14300 lbf63400 N N/A 8000 lbf35600 N N/A 13300 rpm N/A 26600 rpm N/A Ceramic N/A CAD Icon (for items table)
MM313K N/A Single N/A 65 mm N/A 5.5118 in140 mm N/A 1.2992 in33 mm N/A 23100 lbf102700 N N/A 13400 lbf59700 N N/A 10700 rpm N/A 21400 rpm N/A STEEL N/A CAD Icon (for items table)
MMC313K N/A Single N/A 65 mm N/A 5.5118 in140 mm N/A 1.2992 in33 mm N/A 23100 lbf102700 N N/A 11900 lbf53100 N N/A 12840 rpm N/A 25680 rpm N/A Ceramic N/A CAD Icon (for items table)
MM9114K N/A Single N/A 70 mm N/A 4.3307 in110 mm N/A 0.7874 in20 mm N/A 9490 lbf42200 N N/A 6940 lbf30900 N N/A 10700 rpm N/A 21400 rpm N/A STEEL N/A CAD Icon (for items table)
MMC9114K N/A Single N/A 70 mm N/A 4.3307 in110 mm N/A 0.7874 in20 mm N/A 9490 lbf42200 N N/A 6180 lbf27500 N N/A 12800 rpm N/A 25600 rpm N/A Ceramic N/A CAD Icon (for items table)
MM214K N/A Single N/A 70 mm N/A 4.9213 in125 mm N/A 0.9449 in24 mm N/A 15500 lbf69000 N N/A 9800 lbf43600 N N/A 10500 rpm N/A 21000 rpm N/A STEEL N/A CAD Icon (for items table)
MMC214K N/A Single N/A 70 mm N/A 4.9213 in125 mm N/A 0.9449 in24 mm N/A 15500 lbf69000 N N/A 8800 lbf39200 N N/A 12600 rpm N/A 25200 rpm N/A Ceramic N/A CAD Icon (for items table)
MM314K N/A Single N/A 70 mm N/A 5.9055 in150 mm N/A 1.3780 in35 mm N/A 26000 lbf115500 N N/A 15300 lbf68000 N N/A 9900 rpm N/A 19800 rpm N/A STEEL N/A CAD Icon (for items table)
MMC314K N/A Single N/A 70 mm N/A 5.9055 in150 mm N/A 1.3780 in35 mm N/A 26000 lbf115500 N N/A 13600 lbf60600 N N/A 11880 rpm N/A 23760 rpm N/A Ceramic N/A CAD Icon (for items table)
MM9115K N/A Single N/A 75 mm N/A 4.5276 in115 mm N/A 0.7874 in20 mm N/A 9850 lbf43800 N N/A 7500 lbf33400 N N/A 10100 rpm N/A 20200 rpm N/A STEEL N/A CAD Icon (for items table)
MMC9115K N/A Single N/A 75 mm N/A 4.5276 in115 mm N/A 0.7874 in20 mm N/A 9850 lbf43800 N N/A 6700 lbf29800 N N/A 12100 rpm N/A 24200 rpm N/A Ceramic N/A CAD Icon (for items table)
MM215K N/A Single N/A 75 mm N/A 5.1181 in130 mm N/A 0.9843 in25 mm N/A 15500 lbf68900 N N/A 10000 lbf44500 N N/A 9900 rpm N/A 19800 rpm N/A STEEL N/A CAD Icon (for items table)
MMC215K N/A Single N/A 75 mm N/A 5.1181 in130 mm N/A 0.9843 in25 mm N/A 15500 lbf68900 N N/A 8960 lbf39900 N N/A 11900 rpm N/A 23800 rpm N/A Ceramic N/A CAD Icon (for items table)
MM9116K N/A Single N/A 80 mm N/A 4.9213 in125 mm N/A 0.8661 in22 mm N/A 11900 lbf52800 N N/A 9000 lbf40000 N N/A 9420 rpm N/A 18840 rpm N/A STEEL N/A CAD Icon (for items table)
MMC9116K N/A Single N/A 80 mm N/A 4.9213 in125 mm N/A 0.8661 in22 mm N/A 11900 lbf52800 N N/A 7940 lbf35300 N N/A 11300 rpm N/A 22600 rpm N/A Ceramic N/A CAD Icon (for items table)
MM216K N/A Single N/A 80 mm N/A 5.5118 in140 mm N/A 1.0236 in26 mm N/A 18100 lbf80600 N N/A 12000 lbf53400 N N/A 9200 rpm N/A 18400 rpm N/A STEEL N/A CAD Icon (for items table)
MMC216K N/A Single N/A 80 mm N/A 5.5118 in140 mm N/A 1.0236 in26 mm N/A 18100 lbf80600 N N/A 10600 lbf47200 N N/A 11000 rpm N/A 22000 rpm N/A Ceramic N/A CAD Icon (for items table)
MM9117K N/A Single N/A 85 mm N/A 5.1181 in130 mm N/A 0.8661 in22 mm N/A 12300 lbf54900 N N/A 9650 lbf42900 N N/A 8900 rpm N/A 17800 rpm N/A STEEL N/A CAD Icon (for items table)
MMC9117K N/A Single N/A 85 mm N/A 5.1181 in130 mm N/A 0.8661 in22 mm N/A 12300 lbf54900 N N/A 8600 lbf38300 N N/A 10700 rpm N/A 21400 rpm N/A Ceramic N/A CAD Icon (for items table)
MM9118K N/A Single N/A 90 mm N/A 5.5118 in140 mm N/A 0.9449 in24 mm N/A 14500 lbf64500 N N/A 11200 lbf49800 N N/A 8390 rpm N/A 16780 rpm N/A STEEL N/A CAD Icon (for items table)
MMC9118K N/A Single N/A 90 mm N/A 5.5118 in140 mm N/A 0.9449 in24 mm N/A 14500 lbf64500 N N/A 9920 lbf44100 N N/A 10100 rpm N/A 20200 rpm N/A Ceramic N/A CAD Icon (for items table)
MM9120K N/A Single N/A 100 mm N/A 5.9055 in150 mm N/A 0.9449 in24 mm N/A 15000 lbf66700 N N/A 12200 lbf54300 N N/A 7630 rpm N/A 15260 rpm N/A STEEL N/A CAD Icon (for items table)
MMC9120K N/A Single N/A 100 mm N/A 5.9055 in150 mm N/A 0.9449 in24 mm N/A 15000 lbf66700 N N/A 10800 lbf48200 N N/A 9160 rpm N/A 18320 rpm N/A Ceramic N/A CAD Icon (for items table)
MM9122K N/A Single N/A 110 mm N/A 6.6929 in170 mm N/A 1.1024 in28 mm N/A 18700 lbf83400 N N/A 15000 lbf66700 N N/A 6840 rpm N/A 13680 rpm N/A STEEL N/A CAD Icon (for items table)
MMC9122K N/A Single N/A 110 mm N/A 6.6929 in170 mm N/A 1.1024 in28 mm N/A 18700 lbf83400 N N/A 13500 lbf59900 N N/A 8210 rpm N/A 16420 rpm N/A Ceramic N/A CAD Icon (for items table)
MM9124K N/A Single N/A 120 mm N/A 7.0866 in180 mm N/A 1.1024 in28 mm N/A 19400 lbf86300 N N/A 16300 lbf72500 N N/A 6320 rpm N/A 12640 rpm N/A STEEL N/A CAD Icon (for items table)
MMC9124K N/A Single N/A 120 mm N/A 7.0866 in180 mm N/A 1.1024 in28 mm N/A 19400 lbf86300 N N/A 14600 lbf65000 N N/A 7580 rpm N/A 15160 rpm N/A Ceramic N/A CAD Icon (for items table)
MM9126K N/A Single N/A 130 mm N/A 7.8740 in200 mm N/A 1.2992 in33 mm N/A 25300 lbf112600 N N/A 21200 lbf94300 N N/A 5810 rpm N/A 11620 rpm N/A STEEL N/A CAD Icon (for items table)
Unit of Measure
1 2 3