Source document: https://docs-lawep.s3.us-east-2.amazonaws.com/1698059337784.pdf (Liberia)
Self-aligning ball bearings 1220 _ K M C3 W64 2 4 5 1 3 1.

Internal design: 3.

Cage designs: 5.

Lubrication: – E Standard internal design TN9 Optimized internal design M – TN Injection molded polyamide PA66 cage with glass fiber reinforcement Machined brass cage Pressed steel cage (standard) Injection molded polyamide PA66 cage 2.

Variations: 4.
Variations: 4.

Clearance: W64 Solid Oil lubricants K Bearing with 1 to 12 tapered bore 2RS1 Contact seal of acrylonitrile butadine rubber (NBR) with sheet steel backing on both sides of bearing C2 (C0)* C3 C4 Radial internal clearance < Normal Normal radial internal clearance Radial internal clearance > Normal Radial internal clearance > C3 *Not marked on bearing or package N o m e n c l a t u r e 89 Technical features Boundary dimensions In accordance with ISO 15 Tolerances ABEC 1, ISO 492 Max.
temperature 248° F (120° C) for open bearings only Misalignment Series 108, 126, 127, 129, 135 3.0 degrees 2.5 degrees Series 12 (E) 3.0 degrees Series 13 (E) 2.5 degrees Series 22 (E) 1.5 degrees Series 22 E-2RS1 3.0 degrees Series 23 (E) 1.5 degrees Series 23 E-2RS1 2.5 degrees Series 112 (E) 3.0 degrees Series 130, 139 Cage material Standard Polyamide (TN) Glass fiber reinforced polyamide (TN9) Optional Machined brass (M) for large bearings Axial load – max for adapter sleeve mounting Fap = 3 x B x d where B = bearing width in mm d = bearing bore in mm Fap = axial load in Newtons Seals Grease 2RS1 synthetic rubber (NBR) seals Lithium soap with mineral oil Self-aligning ball bearing (open design) (data tables on page 96) Self-aligning ball bearing (sealed design) (data tables on page 100) 90 Introduction Self-aligning ball bearings have two rows of balls with a common sphered raceway in the outer ring.
This feature gives the bearings their self-aligning property, permitting angular misalignment of the shaft relative to the housing.

Therefore, they are particularly suitable for appli- cations where misalignment can arise from errors in mounting or from shaft delection.

For applications where the load carrying capac- ity of self-aligning ball bearings is insuficient; spherical roller bearings, which have the same self-aligning property, should be used.
SKF self-aligning ball bearings of the E design have higher load carrying capacity than bear- ings of the original standard design because of improvements to the internal design.

This makes them suitable for a wider range of applications than their predecessors; i.e., the same size of bearing can be used to carry heavier loads, or if the loads remain the same, operational reliability is enhanced and bearing life is longer.
Self-aligning ball bearings of the E design are itted with a glass iber reinforced polyamide PA66 cage (TN9) as standard.

SKF self-aligning ball bearings are available in several designs of which the most common are shown in this catalog: • Basic open (unsealed) design bearings • Bearings with seals on both sides Basic design Self-aligning ball bearings of the basic design are available with a cylindrical bore as well as with a tapered bore (taper 1:12).
For self-aligning ball bearings with a tapered bore, SKF supplies appropriate adapter sleeves with which the bearings can be secured simply and rapidly to smooth or stepped shafts.

The adapter sleeves are supplied complete with nut and locking device.

Additional information can be found in the Split Pillow Block sections (inch and metric) under “Mounted Accessories”.

Variations Sealed bearings SKF self-aligning ball bearings are also available in a sealed (2RS1) version with rubbing seals on both sides.
The seals are made of oil and acrylonitrile butadiene rubber (NBR) and have a sheet steel reinforcement.

The operating temperature range for the seal material is -40° to +248° F (-40° to +120° C).

The outside diameter of the seal is retained in a recess in the outer ring giving a tight seal without deformation, while the lip of the seal exerts a slight pressure against a recess in the inner ring shoulder.
The sealed bearings are supplied as standard illed with a lithium base grease which is suitable for the operating temperature range -22° to +230° F (-30° to +110° C).

The bearings are lubricated for life and are maintenance free.

They should not be heated at temperatures greater than 250° F (120° C) prior to mounting and must on no account be washed.

SKF self-aligning ball bearings with seals are avail- able with a cylindrical bore or with a tapered bore, the taper being 1:12 as for the basic bearings.
Special solutions for bearings with extended inner ring Self-aligning ball bearings with extended inner ring (series 11200) are used for applications employing commercial ground shafting.

The special bore tolerance of these bearings allows easy mounting and dismounting.

Self-aligning ball bearings with extended inner ring are located axially by pins or shouldered screws which engage in a slot at one side of the inner ring.

The pins or screws also prevent the inner ring from turning on the shaft.
When these bearings are used in pairs, the slots of the inner rings must either be adjacent or at the outboard positions.

Otherwise, the shaft will be located in one direction only.

Details on these special solution prod- ucts are available in other SKF pub- lications, which can be supplied upon request.

Introduction Product highlights Optimum performance SKF self-aligning ball bearings have been designed to provide optimum performance in a wide range of machinery and equip- ment applications.
They are particularly suitable for applications where misalignment can arise from errors in shaft and housing alignment or shaft delection and where high speed is a requirement.

Capacity for resistance-free, self-alignment In the event of minor angular misalignment, the problems which beset many other bearing types do not occur – allowing for increased operational life, lower friction and temperature, less wear and noise during operation, and reduced stress on both the cages and lubricants.
Sealed bearings – greased for life SKF self-aligning ball bearings are available with contact seals on both sides which pro- tect the bearing from contaminants during handling and operation.

This allows for longer bearing service life, is environmen- tally friendly, and requires no relubrication – making the bearing maintenance free.
Large product assortment Available in a wide range (5 to 130 mm bore diameter), the basic SKF design is available with a choice of seals, cage materials, and extended inner rings.

Application flexibility Self-aligning bearings are used in high speed applications where alignments may be a problem and running accuracy is re- quired.

Examples include fans and blowers, textile equipment and general conveyor equipment.
91 Mounting bearings with tapered bore Bearings with a tapered bore are always mounted with an interference it on the shaft, adapter sleeve or withdrawal sleeve.

As a measure of the degree of interference of the it, either the reduction in radial internal clearance of the bearing or the axial dis- placement of the inner ring on the tapered bearing seating can be used.
The mounting of self-aligning ball bearings with tapered bore calls for experience and skill as they have a relatively small internal clearance, and a reliable measurement of the clearance reduction is not always possible.

There are speciic mounting instructions for these bearings in the SKF Bearing Installation and Maintenance Guide (140-710) or by visiting the SKF website www.skf.com/mount for exact mounting instructions.
Frequency vibration data Frequency vibration data is available on the SKF website www.skf.com under Knowledge Centre/ Engineering tools and CAD, or by contacting SKF Applications Engineering.

Introduction Special feature Self-aligning ball bearings of series 12 (K) and 13 (K) have balls which protrude somewhat from the bearing; the actual values are given in the adjacent table.

This should be remembered when designing adjacent components.
Protrusion of balls from bearing side faces C1 Bearing 1224(K) 1226 1318(K) 1319(K) 1320(K) 1322(K) Protrusion C1 mm in 1.3 1.4 1.1 1.5 2.5 2.6 0.0512 0.0551 0.0433 0.0591 0.0984 0.1024 Clearance Radial internal clearance SKF self-aligning ball bearings are produced with Normal radial internal clearance (CN or C0, not marked on bearing) as standard.

Radial clear- ance selection is based on factors such as high speed, operating temperature, shaft its and axial movement limitations.
Bearings with a tapered bore are normally supplied with a C3 radial internal clearance (marked on the bearing).

Bearings having clearances that are greater than (C3 or C4) or less than (C2) Normal are available on request.

The clearance values are given in Table 1.

They are valid for unmounted bearings without measuring load, and conform to ISO 5753-1991.
Loads Equivalent dynamic bearing loads P = Fr + Y1Fa where Fa / Fr ≤ e P = 0.65 Fr + Y2 Fa when Fa / Fr > e Values of factors e, Y1 and Y2 for each individual bearing are given in the bearing Table 2, page 96.

Minimum load In order to provide satisfactory operation of all ball and roller bearings they must always be subjected to a given minimum load.
This is also true of self-aligning ball bearings, particularly if they run at high speeds where the inertia forces of the balls and cage, and the friction in the lubricant can have a detrimental inluence on the rolling conditions in the bearing and may cause damaging sliding movements to occur between the balls and the raceways.
The requisite minimum radial load to be applied in such cases can be determined by using the Interactive Engineering catalog on the SKF website www.skf.com or by contacting SKF Applications Engineering.

However, the weight of the compo- nents supported by the bearing, together with the external forces, often exceeds the requisite mini- mum load.

If this is not the case, an additional radial load must be applied to the bearing; for example, by increasing belt tension or similar means.
92 Introduction Table 1 Radial internal clearance of self-aligning ball bearings Bore diameter d over mm incl.
Radial internal clearance C2 min max min µm in max Normal min max µm min in max C3 min max µm min in max C4 min max µm min in max Bearings with cylindrical bore Bearings with tapered bore Introduction Calculation factors for self-aligning ball
 bearings Table 2 Calculation factors e Y1 Designation Bearings with cylindrical bore 126 127 129 1200 E 1201 E 1202 E 1203 E 1204 E 1205 E 1206 E 1207 E 1208 E 1209 E 1210 E 1211 E 1212 E 1213 E 1214 E 1215 1216 1217 1218 1219 1220 1221 1222 1224 1226 135 1301 E 1302 E 1303 E 1304 E 1305 E 1306 E 1307 E 1308 E 1309 E 1310 E 1311 E 1312 E 1313 E 1314 1315 1316 1317 1318 1319 1320 1322 94 Y2 Calculation factors for self-aligning ball bearings Introduction Table 2 Designation Bearings with cylindrical bore 1412 2200 E 2201 E 2202 E 2203 E 2204 E 2205 E 2206 E 2207 E 2208 E 2209 E 2210 E 2211 E 2212 E 2213 E 2214 2215 E 2216 E 2217 2218 2219 2220 2221 2222 2301 2302 2303 2304 2305 E 2306 2307 E 2308 E 2309 E 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2322 Calculation factors e Y1 Y2 3.0 1.8 2.0 2.3 2.3 2.4 2.8 3.0 3.1 3.5 3.7 4.2 4.2 4.1 4.1 3.6 4.5 4.5 3.9 3.6 3.6 3.6 3.5 3.5 1.6
Double row Open, cylindrical and tapered bore Series: 126 – 1226 M Size: 6 mm – 130 mm 0.2362 in – 5.1181 in B B D d D d Cylindrical Bore Cylindrical bore Tapered Bore Tapered bore Designation Principal dimensions Basic load ratings Speed rating Mass Designation Mass Bore d Outside diameter D Width B Dynamic C Static C0 Refer- ence speed Limiting speed Tapered bore Adapter sleeve mm in mm in mm in N lbf N lbf r/min r/min kg lb kg lb 63
– – – – – – – – – – – – – – – – 1204 EK H 204 1205 EK H 205 1206 EK H 206 1207 EK H 207 1208 EK H 208 1209 EK H 209 1210 EK H 210 1211 EK H 211 1212 EK H 212 1213 EK H 213 – – 1215 K H 215 1216 K H 216 1217 K H 217 1218 K H 218 1219 K H 219 8.16 3.70 5.15 11.36 6.75 14.88 1220 K H 220 1222 K H 222 1224 KM H 3024 – – – – – – – – 0.0 0.1 0.1 0.1 0.2 0.2 0.2 0.3 0.3 0.4 – 0.7 0.8 1.0 1.1 1.2 1.5 1.9 1.9 – – – – – – – – 0.1 0.1 0.2 0.3 0.3 0.4 0.5 0.6 0.7 0.8 – 1.5 1.8 2.2 2.5 2.7 3.3 4.1 4.2 126 127 108 129 1200 E 1201 E 1202 E 1203 E 1204 E 1205 E 1206 E 1207 E 1208 E 1209 E 1210 E 1211 E 1212 E 1213 E 1214 E 1215 1216 1217 1218 1219 1220 1222 1224 M 1226 M 130 5.1181 230 9.0551 46 1.8110 127 000 28 540 58 500 13 150 5 600 3 600 8.30 18.30 1226 KM H 3026 2.8 6.1 Consult SKF USA Inc. prior to design change or order placement.
96 B B D d D d Cylindrical Bore Cylindrical bore Tapered Bore Tapered bore Double row Open, cylindrical and tapered bore Series: 135 – 1322 M Size: 5 mm – 110 mm 0.1969 in – 4.3307 in Designation Principal dimensions Basic load ratings Speed rating Mass Designation Mass Bore d Outside diameter D Width B Dynamic C Static C0 Refer- ence speed Limiting speed Tapered bore Adapter sleeve mm in mm in mm in N lbf N lbf r/min r/min kg lb kg lb 110 490 580 63 000 40 000 34 000 45 000 28 000 24 000 135 1301 E 1302 E 1303 E 1304 E 1305 E 1306 E 1307 E 1308 E 1309 E 1310 E 1311 E 1312 E 1313 E 0.16
– – – – – – – – – – 1305 EK H 305 1306 EK H 306 1307 EK H 307 1308 EK H 308 1309 EK H 309 1310 EK H 310 1311 EK H 311 1312 EK H 312 1313 EK H 313 – – 7.83 3.55 9.26 4.20 5.00 11.03 1315 K H 315 1316 K H 316 1317 K H 317 5.80 12.79 6.70 14.77 8.30 18.30 1318 K H 318 1319 K H 319 1320 K H 320 – – – – – 0.1 0.1 0.1 0.2 0.2 0.3 0.3 0.4 0.4 – 0.8 1.0 1.1 1.3 1.4 1.7 – – – – – 0.2 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 – 1.8 2.2 2.5 3.0 3.1 3.7 1322 M 110 4.3307 240 9.4488 50 1.9685 163 000 36 630 72 000 16 180 5 300 3 600 12.00 26.46 1322 KM H 322 2.2 4.8 Consult SKF USA Inc. prior to design change or order placement.
97 Double row Open, cylindrical and tapered bore Series: 2200 E – 2222 Size: 10 mm – 110 mm 0.3937 in – 4.3307 in B B D d D d Cylindrical Bore Cylindrical bore Tapered Bore Tapered bore Designation Principal dimensions Basic load ratings Speed rating Mass Designation Mass Bore d Outside diameter D Width B Dynamic C Static C0 Refer- ence speed Limiting speed Tapered bore Adapter sleeve mm in mm in mm in N lbf N lbf r/min r/min kg lb kg lb 2200 E 2201 E 2202 E 2203 E 2204 E 2205 E 2206 E 2207 E 2208 E 2209 E 2210 E 2211 E 2212 E 2213 E 2214 2215 E 2216 E 0.09
– – – – – – – – – – 2205 EK H 305 2206 EK H 306 2207 EK H 307 2208 EK H 308 2209 EK H 309 2210 EK H 310 2211 EK H 311 2212 EK H 312 2213 EK H 313 – – 2215 EK H 315 2216 EK H 316 2217 K H 317 7.50 3.40 4.10 9.04 5.00 11.03 2218 K H 318 2219 K H 319 2220 K H 320 – – – – – 0.1 0.1 0.1 0.2 0.2 0.3 0.3 0.4 0.4 – 0.8 1.0 1.1 1.3 1.4 1.7 – – – – – 0.2 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 – 1.8 2.2 2.5 3.0 3.1 3.7 2222 110 4.3307 200 7.8740 53 2.0866 124 000 27 870 52 000 11 690 6 000 4 300 7.10 15.66 2222 K H 322 2.2 4.8 Consult SKF USA Inc. prior to design change or order placement.
98 B B b K r2 r1 r1 r2 D d D d D1D d d2 Cylindrical Bore Cylindrical bore Tapered Bore Tapered bore 4 B Double row Open, cylindrical and tapered bore Series: 2301 – 2320 M Size: 12 mm – 100 mm 0.4724 in – 3.9370 in Series: 13030 – 13948 Size: 150 mm – 240 mm 5.9055 in – 9.4488 in Designation Principal dimensions Basic load ratings Speed rating Mass Designation Mass Bore d Outside diameter D Width B Dynamic C Static C0 Refer- ence speed Limiting speed Tapered bore Adapter sleeve mm in mm in mm in N lbf N lbf r/min r/min kg lb kg lb 14
– – – – – – – – 2305 EK H 2305 2306 K H 2306 2307 EK H 2307 2308 EK H 2308 2309 EK H 2309 2310 K H 2310 2311 K H 2311 2312 K H 2312 7.17 3.25 3.90 8.60 4.70 10.36 2313 K H 2313 – 2315 K H 2315 – 6.10 13.45 7.05 15.55 8.45 18.63 2316 K H 2316 2317 KM H 2317 2318 K H 2318 4 500 4 000 9.80 21.61 12.50 27.56 2319 KM H 2319 2320 K H 2320 3 400 2 800 2 600 7.50 16.54 16.00 35.28 10.70 23.59 2 400 2 200 11.00 24.26 11.30 24.92 – – – – – – – – – – – – – – 0.1 0.1 0.2 0.2 0.3 0.3 0.4 0.5 0.5 – 1.0 1.2 1.4 1.7 1.8 2.1 – – – – – – – – – 0.2 0.3 0.4 0.5 0.6 0.8 0.9 1.0 1.1 – 2.2 2.7 3.1 3.7 4.0 4.6 – – – – – 2301 2302 2303 2304 2305 E 2306 2307 E 2308 E 2309 E 2310 2311 2312 2313 2314 2315 2316 2317 M 2318 2319 M 2320 13 030 13 036 13 940 13 944 13 948 Consult SKF USA Inc. prior to design change or order placement.
99 Double row Sealed, cylindrical and tapered bore Series: 2200 E 2RS1 – 2214 E 2RS1 Size: 10 mm – 70 mm 0.3937 in – 2.7559 in B B D d D d d Cylindrical Bore Cylindrical bore Tapered Bore Tapered bore 2RS1 2RS1 Designation Principal dimensions Basic load ratings Speed rating Mass Designation Mass Bore d Outside diameter D Width B Dynamic C Static C0 Refer- ence speed Limiting speed Tapered bore Adapter sleeve mm in mm in mm in N lbf N lbf r/min r/min kg lb kg lb 2200 E- 2RS1TN9 2201 E- 2RS1TN9 2202 E- 2RS1TN9 2203 E- 2RS1TN9 2204 E- 2RS1TN9 2205 E- 2RS1TN9 2206 E- 2RS1TN9 2207 E- 2RS1TN9 2208 E- 2RS1TN9 2209 E- 2RS1TN9 2210 E- 2RS1TN9 2211 E- 2RS1TN9 2212 E- 2RS1TN9 2213 E- 2RS1TN9 2214 E- 2RS1TN9 – – – – – – – – – – – – – – – – – – – – 2205 E- 2RS1K 2206 E- 2RS1K 2207 E- 2RS1K 2208 E- 2RS1K 2209 E- 2RS1K 2210 E- 2RS1K 2211 E- 2RS1K 2212 E- 2RS1K 2213 E- 2RS1K H 305 E 0.07 0.20 H 306 E 0.10 0.30 H 307 E 0.14 0.40 H 308 E 0.17 0.40 H 309 E 0.23 0.60 H 310 E 0.27
 0.60 H 311 E 0.32 0.80 H 312 E – – H 313 E 0.42 1.00 70 2.7559 125 4.9213 31 1.2205 35800 8 040 14 600 3 280 35 800 3 400 1.45 3.20 – – – – Consult SKF USA Inc. prior to design change or order placement.
100 B B D d D d 2RS1 d Cylindrical Bore Cylindrical bore Tapered Bore Tapered bore 2RS1 2RS1 Double row Sealed, cylindrical and tapered bore Series: 2302 E 2RS1 – 2310 E 2RS1 Size: 15 mm – 50 mm 0.5906 in – 1.9685 in Designation Principal dimensions Basic load ratings Speed rating Mass Designation Mass Bore d Outside diameter D Width B Dynamic C Static C0 Refer- ence speed Limiting speed Tapered bore Adapter sleeve mm in mm in mm in N lbf N lbf r/min r/min kg lb kg lb 2302 E- 2RS1TN9 2303 E- 2RS1TN9 2304 E- 2RS1TN9 2305 E- 2RS1TN9 2306 E- 2RS1TN9 2307 E- 2RS1TN9 2308 E- 2RS1TN9 2309 E- 2RS1TN9 2310 E- 2RS1TN9 – – – – – – 2305 E- 2RS1K 2306 E- 2RS1K 2307 E- 2RS1K 2308 E- 2RS1K 2309 E- 2RS1K 2310 E- 2RS1K H 2305 H 2306 H 2307 E H 2309 H 2309 H 2310 – – – – – – – – – – – – – – – – – – Consult SKF USA Inc. prior to design change or order placement.
101 Notes Consult SKF USA Inc. prior to design change or order placement.

102