 SKF BEARING 2305 M/VQ335, SELF ALIGNING NEW US $39.95 
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 SKF Self-Aligning Roller Bearing 1305 ETN9 ** NEW ** US $29.99
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 NEW SKF SELF ALIGNING BEARING 2212 SH US $41.24
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 NEW LOT OF 2 SHAFER AEROSPACE ANNULAR BEARING SELF ALIGNING 77896-DA12-38A1-500 US $89.00
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 SKF 1207KTN9 Self Aligning Ball Bearing 1207-KTN9 New US $20.00
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 LOT SNR SELF ALIGNING BALL BEARING 1205 G15 QTY 2 US $35.00
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 LOT OF RIV 2AJ CH 02 SELF ALIGNING BALL BEARING QTY 3 US $55.00
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 2200-2-RS DOUBLE SEAL SELF ALIGNING BEARING GUL 22002RS US $14.95
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 2201-2-RS DOUBLE SEAL SELF ALIGNING BEARING GUL 22012RS US $14.95
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 2206-2-RS DOUBLE SEAL SELF ALIGNING BEARING GUL 22062RS US $25.95
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 55mm FAFNIR L411 SELF ALIGNING BALL BEARING US $179.99
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 SKF 13301, double row, self-aligning bearing US $19.99
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 SKF 13302, double row, self-aligning bearing US $19.99
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 SKF 1412M C3 Self-Aligning Ball Bearing 035C Explorer US $199.00
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 20mm UCP204 Mounted Block Cast Housing Self-aligning Pillow Bearing US $20.86
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 Self Aligning 1/2" Bore Pressed Steel Pillow Block Bearing NEW US $15.00
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 REX ZMC-6-220 ZMC62200 OR ZMC-6-2115 ZMC62115 SELF-ALIGNING ROLLER BEARING NIB US $412.50
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 INA KN2558 Light Self Aligning Open Linear Bearing 25mm US $35.48
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 1 Self Aligning Ball Bearings 2202 15x35x14 Self-Align US $9.95
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 New In Box SKF 1212 ETNP Self Aligning Ball Bearing US $39.99
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 UCP204 20mm Inner Diameter Self-aligning Pillow Block Mounted Bearings US $22.52
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 SKF Self Aligning Bearing 1210 EKTN9 US $16.93
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 1312 J Self Aligning Ball Bearing by SKF (NIB!) US $.01
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 20mm UCP204 Self-aligning Pillow Block Mounted Bearings US $23.72
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 SKF 2204 E 2RS1 TN9, Double Row Self-Aligning Bearing US $89.99
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 SKF 1200 ENT9, Double Row Self-Aligning Bearing, ENT 9 US $21.99
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 Self Aligning Ball Bearings 15mm x 42mm 13mm Self-Align US $9.95
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 SKF Self Aligning Spherical Roller Bearing, 22210-CKY US $62.00
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 NEW OLD STOCK REX SEAL MS9 FOR SELF ALIGNING ROLLER BEARING SIZE CODE 9 US $19.99
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 129 Self Aligning Bearing 9mm x 26mm x 8 mm Metric VXB US $4.95
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 FAG 1207TV Self-Aligning Bearing 1207-TV ** NEW ** US $29.50
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 SKF Double Row Self-Aligning Ball Bearing 2312M/C2 NR US $109.99
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 NOS SKF 2308J Self-Aligning Double Row Ball Bearings US $57.50
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 NEW SKF Self Aligning Ball Bearing 2215ETN9 75mm Inner x 130mm x 31mm US $99.99
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 SKF 2206E-2RS1TN9 SELF ALIGNING BALL BEARING 1.180 BORE NEW CONDITION IN BOX US $48.00
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 NEW SKF 2204E-2RS1/TN9LHT23 2204E2RS1TN9LHT23 SELF ALIGNING BALL BEARING US $70.00
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 SKF Self-Aligning Roller Bearing 3207 ATN9 ** NEW ** US $28.99
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 SKF Sweden 1209-ETN9 Double Row Self-Aligning Ball Bearing, New US $24.00
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 126 Self Aligning Bearing 6 x 19 x 6 mm Metric Bearings US $4.95
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 NOS! SKF SELF ALIGNING BALL BEARING 1206-ETN9 1206ETN9 US $17.95
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 NEW BOSTON GEAR 48233 HF-4G SELF ALIGNING BEARING FEMAL US $15.99
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 Self Aligning Ball Bearing 2200 10x30x14 Self-Align US $13.77
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 SKF 2206E-2RS1TN9 SELF ALIGNING BALL BEARING 1.180 BORE NEW CONDITION NO BOX US $45.00
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 SKF Self Aligning Ball Bearing 1210 KJ 1210KJ New US $10.44
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 NEW CONSOLIDATED STEYR 1307 SELF ALIGNING BEARING US $14.43
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 1205 Self Aligning Ball Bearing 25mm x 52mm/15mm Swivel US $17.77
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 FAG 2202 2RS, Double Row Self-Aligning bearing US $79.99
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 SKF MODEL 2212E-2RS1TN9 SELF ALIGNING BALL BEARING NEW US $85.00
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 4187 NEW Rexnord ZS4 Self Aligning Roller Bearings Seal US $6.93
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 NEW RBC SJ7255 SELF ALIGNING NEEDLE ROLLER BEARING US $10.00
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 NEW SKF Self-Aligning Bearing 1307 ETN9 1307ETN9 US $22.00
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 SNR 2207.EE.G15 2207-EE-G15 DOUBLE ROW SELF-ALIGNING BALL BEARING, SEALED TYPE, US $48.75
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 Lot of (4) 2203 E-2RS1TN9 Sealed Double Row Self Aligning SKF Ball Bearings NIB! US $46.00
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 Lot of (2) 2209ETN9 Double Row Self Aligning SKF Ball Bearings (NIB!) US $89.99
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 SKF 2313 DOUBLE ROW SELF-ALIGNING BEARING NIB US $160.00
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 Self Aligning Ball Bearings 15mm x 35mm x 11mm Align US $9.95
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 SKF Double Row Self-Aligning Ball Bearing RL5TN9 16mm US $21.24
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 SKF MODEL 1203 ETN9 SELF ALIGNING BALL BEARING NIB!!! US $25.00
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 Consolidated Double Row Self-Aligning Bearing 1206 C3 NIB US $16.99
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 50mm SKF 1310 CYLINDRICAL SELF-ALIGNING BALL BEARING US $69.99
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 New Timken GRAE35RRB Self-Aligning Insert Ball Bearing US $42.49
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 NEW DODGE SCM 3-1/2 -210 SELF ALIGNING FLANGE CARTRIDGE BEARING SCM 3 1/2 SCM312 US $205.50
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 1303 Self Aligning Steel/Metal 17x47x14 Ball Bearings US $7.95
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 SKF 2205 ETN9, Double Row Self-Aligning Bearing US $43.99
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 Fafnir Double Row Self Aligning Ball Bearing L209 New US $28.25
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 SKF MODEL 2200E-2RS1TN9 SELF-ALIGNING BEARING NIB!!! US $65.00
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 REXNORD ZB 2102 SELF ALIGNING FLANGE BEARING 1 1/8" BORE US $230.00
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 SKF 2203 E-2RS1TN9 SELF-ALIGNING BALL BEARING NEW!!!! US $65.00
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 SKF MODEL 2212ETN9 SELF ALIGNING BALL BEARING NNB!!! US $85.00
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 48SCRN32K Nachi Self-Aligning Clutch-Release Bearing Japan 32x48x21 Ball Bearing US $34.29
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 60SCRN31T Nachi Self-Aligning Clutch-Release Bearing Japan 35x60x25 Ball Bearing US $55.29
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 47SCRN34K-6 Nachi Self-Aligning Clutch-Release Bearing Japan 29x47x21 Ball Beari US $30.95
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 SKF 2204 E-2RS1TN9 SELF-ALIGNING BALL BEARING NIB!!!! US $60.00
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 NTN BCA Double Row Self Aligning Ball Bearing 2307L1 NR US $84.99
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 1200 Self Aligning Bearing 10mm x 30mm x 9 mm Metric US $7.95
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 Eaton Aerospace Self-Aligning Plain Bearing US $99.99
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Aligning Bearing
Bearing Alignment
AC Motor Laser Shaft Alignment
Laser shaft alignment is a very effective way to maintain industrial rotating machinery. Misalignment occurs when the centerlines of rotation of two or more machinery shafts are not in line with each other. Laser shaft alignment is a natural compliment to vibration analysis. Properly aligning shafts eliminates one of the major causes of vibration in rotating machines and also drastically extends bearing life.
Utilizing a state-of-the-art laser measurement system, a technician will measure and align couplings, universal joints and belts. The U.S. Department of Energy's Industrial Technologies Program (ITP), which promotes energy efficiency, recommends the annual inspection of shaft alignment in production critical equipment. It has observed that performing coupling alignment on a scheduled basis will make machinery last longer and perform more efficiently
Large electric motors can be directly, rigidly coupled or flexibly coupled. Rigid couplings do not compensate for any motor-to-driven-equipment misalignment while flexible couplings tolerate small amounts of misalignment. The ITP recommends that parallel offset alignment tolerances not exceed 2 mils at 1200 rpm, to 0.75 mils at 3600 rpm. With excessive misalignment, even flexible couplings can contribute to premature bearing, seal, or coupling failures. Other effects can include loosening foundation bolts and coupling bolts. Qualified technicians can detect this "soft foot" condition.
Laser shaft alignment prevents angular misalignment, when the electric motor driveshaft is set at an angle to the driven equipment. It also prevents parallel misalignment, when the two shafts are offset vertically or horizontally, displaced to the left or the right, or positioned at different elevations.
To ensure laser coupling alignment measurements, use service technicians qualified to do that work. It is up to them to find out if the alignment is in within OEM tolerances. Their analysis should take into consideration "thermal growth" for the expansion of the shaft as it reaches operational speed and heats up. You should receive accurate reports about either vertical or horizontal machines.
About the Author
David Manney is the Marketing Communications Coordinator for L&S Electric. With 13 locations throughout the upper Great Lakes and Canada, we're one of the argest rotating apparatus service providers in the United States. We also distributes a wide variety of motors and electrical products, provides complete reliability and power services.
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