Shielded Bearing

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what is a consideration when replacing a shield or shielded bearing?

We're going to need a LOT more information, sorry.

What is the bearing size, what is it used on, are you replacing the bearing shield or the whole bearing? How accessible is it? Does anything need to be disassembled before removing the bearing?

Here are some general notes from my experience (my experience is primarily with radial contact bearings for 1.5" shafts and smaller - some experience working with angular contact, though the principle isn't much different).
1. Most bearings are pressed onto a shaft on the ID of the bearing, and slip on the OD - this is to preserve the intended bearing clearances. This means you'll have to pry the bearing from the shaft, but the housing may just slip right off.
2. A bearing puller will be needed - these will grab the outer race of the bearing and basically press the shaft through the center. If you want to salvage the bearing, you'll need to pull it by the inner race, not the outer, or you'll likely cause fretting inside the bearing.
3. To put the new bearing on, you'll want a pusher that pushes on one or both bearing races (if it's a slip fit into the housing, you don't need to worry about pushing the outer race). You risk damaging the bearing if you press it incorrectly. Just keep in mind that you shouldn't push the inner and outer races in opposite directions or you'll risk putting too much stress on the races and balls.
4. Generally an arbor press is used to install the bearings onto the shaft/into the housing. You can hammer them into place, but again, be careful about damaging the bearing.
5. Always wear eye protection...

If you're just replacing the shield, you should be able to pop the old shield out with a needle or small screw driver (depending on size). The new one should pop into place pretty easily. If you're re-greasing, you'll want to do that BEFORE putting the new shield on :-). If you need to know how much grease to put in, contact the bearing manufacturer (they'll probably want application information). If you don't feel like calling them, it's generally not a problem to pack as much grease as you can fit into the bearing...excess will usually just ooze out.

Hope that helps. If you have photos or other info it should help with an answer more specific to what you need.

Discover Shielded Bearing On eBay Below:

Bearing Shielded Deep Groove Radial Ball SS 10 x 19 x 5mm VAT 61800 ZZ
Bearing Shielded Deep Groove Radial Ball SS 10 x 19 x 5mm VAT 61800 ZZ
$19.80
2pcs 608 ZZ Ball Bearing 8x22x7mm Dual Shielded Metal Chrome Skateboard 608Z
2pcs 608 ZZ Ball Bearing 8x22x7mm Dual Shielded Metal Chrome Skateboard 608Z
$2.33
10Pcs 5x10x4mm Metal Sealed Shielded Deep Groove Ball Bearing MR105ZZ
10Pcs 5x10x4mm Metal Sealed Shielded Deep Groove Ball Bearing MR105ZZ
$3.70
Machifit 10pcs 6x17x6mm 606zz Steel Sealed Shielded Deep Groove Ball Bearing
Machifit 10pcs 6x17x6mm 606zz Steel Sealed Shielded Deep Groove Ball Bearing
$3.99
10pcs 4x13x5mm Steel Sealed Shielded Deep Groove Ball Bearing 624zz
10pcs 4x13x5mm Steel Sealed Shielded Deep Groove Ball Bearing 624zz
$4.10
Bearing PKG 4 Deep Grove Shielded Extra Thin Metric od 18mm id 12mm 4mmW EZO 680
Bearing PKG 4 Deep Grove Shielded Extra Thin Metric od 18mm id 12mm 4mmW EZO 680
$66.00
5pcs 9mm x 4mm x 4mm Double Shielded Ball Bearing for RC Model Car
5pcs 9mm x 4mm x 4mm Double Shielded Ball Bearing for RC Model Car
$8.71
Bearing Shielded Radial 17mmID X 35mmOD X 10mmW NTN 60032
Bearing Shielded Radial 17mmID X 35mmOD X 10mmW NTN 60032
$9.90
Pro Auto Darkening Solar welders Welding Helmet Mask Shield ARC TIG MAG Hood
Pro Auto Darkening Solar welders Welding Helmet Mask Shield ARC TIG MAG Hood
$28.53
NTN 6916ZZ 2A BALL BEARING 6916Z DEEP GROOVE SHIELDED NOS
NTN 6916ZZ 2A BALL BEARING 6916Z DEEP GROOVE SHIELDED NOS
$110.99
NACHI 6007ZZE BEARING SHIELDED C3 JAPAN 35X62X14 BALL BEARING FNOB
NACHI 6007ZZE BEARING SHIELDED C3 JAPAN 35X62X14 BALL BEARING FNOB
$11.50
CE Certified Solar Auto Darkening Welding Arc Tig Mig Mask Helmet Shield
CE Certified Solar Auto Darkening Welding Arc Tig Mig Mask Helmet Shield
$33.18
1 Pack of 4 AMAT 3060 90140 BEARING DEEP GROOVE TWO SHIELD
1 Pack of 4 AMAT 3060 90140 BEARING DEEP GROOVE TWO SHIELD
$20.00
LOT OF 2 SKF 6200 2ZJEM RADIAL BALL BEARINGS DEEP GROOVE STYLE DOUBLE SHIELD
LOT OF 2 SKF 6200 2ZJEM RADIAL BALL BEARINGS DEEP GROOVE STYLE DOUBLE SHIELD
$25.00
Certified Solar Auto Darkening Welding Arc Tig Mig Mask Helmet Shield Brand New
Certified Solar Auto Darkening Welding Arc Tig Mig Mask Helmet Shield Brand New
$34.96
5 CNC 1 2 Drive Shaft Support Bearings R8 ZZ Shielded Premium Bearing ABEC3
5 CNC 1 2 Drive Shaft Support Bearings R8 ZZ Shielded Premium Bearing ABEC3
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AMAT 0040 76579 BEARING SHIELD FIXED ABBRASIVE 300MM NEW
AMAT 0040 76579 BEARING SHIELD FIXED ABBRASIVE 300MM NEW
$7,200.00
10Pcs 6203RS Shielded Deep Groove Radial Ball Bearings 17mmx40mmx12mm
10Pcs 6203RS Shielded Deep Groove Radial Ball Bearings 17mmx40mmx12mm
$13.25
Solar Auto Darkening Welding Arc Tig Mig Mask Helmet Shield
Solar Auto Darkening Welding Arc Tig Mig Mask Helmet Shield
$34.96
3pcs 8mm x 4mm x 3mm Double Shielded Bearing for RC Model Car
3pcs 8mm x 4mm x 3mm Double Shielded Bearing for RC Model Car
$4.88
Simplicity Bronze Slinger Bearing Shield For Shakeouts Serial  510 SODE 2 155
Simplicity Bronze Slinger Bearing Shield For Shakeouts Serial 510 SODE 2 155
$99.99
Simplicity Bronze Slinger Bearing Shield For Shakeouts Serial  410 SODE 192
Simplicity Bronze Slinger Bearing Shield For Shakeouts Serial 410 SODE 192
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Bearing SKF MF74 ZZ Miniature Flange Ball Bearing 4mm x 7mm x 25mm Shielded
Bearing SKF MF74 ZZ Miniature Flange Ball Bearing 4mm x 7mm x 25mm Shielded
$2.20
NTN 6804ZZ 2A DEEP GROOVE BALL BEARING DOUBLE SHIELDED LOT OF 2 BEARINGS NOS
NTN 6804ZZ 2A DEEP GROOVE BALL BEARING DOUBLE SHIELDED LOT OF 2 BEARINGS NOS
$35.99
CAT 235001103 SHIELD BEARING FOR PG 5 NO6
CAT 235001103 SHIELD BEARING FOR PG 5 NO6
$21.25
CAT E2 13 3 Bearing Double Shield Chain Tensioner 746 90156 1 LAM TCP 9600
CAT E2 13 3 Bearing Double Shield Chain Tensioner 746 90156 1 LAM TCP 9600
$106.25
Trend B95 Imperial ZZ Metal Shielded Ball Bearing 1 4 X 3 8 X 1 8
Trend B95 Imperial ZZ Metal Shielded Ball Bearing 1 4 X 3 8 X 1 8
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NEW FAG 6311 2ZR C3 METAL SHIELDED DEEP GROOVE BALL BEARING 55x120x29mm
NEW FAG 6311 2ZR C3 METAL SHIELDED DEEP GROOVE BALL BEARING 55x120x29mm
$65.00
NEW NSK 6311 2ZR METAL SHIELDED DEEP GROOVE BALL BEARING 55x120x29mm
NEW NSK 6311 2ZR METAL SHIELDED DEEP GROOVE BALL BEARING 55x120x29mm
$65.00

Recently Purchased Shielded Bearing:


10pcs 4x13x5mm steel sealed shielded deep groove ball bearing 624zz, machifit 10pcs 6x17x6mm 606zz steel sealed shielded deep groove ball bearing, 10pcs 5x10x4mm metal sealed shielded deep groove ball bearing mr105zz, bearing skf mf74zz miniature flange ball bearing 4mm x 7mm x 25mm shielded, 2pcs 608zz ball bearing 8x22x7mm dual shielded metal chrome skateboard 608z, ce certified solar auto darkening welding arc tig mig mask helmet shield, nachi 6007zze bearing shielded c3 japan 35x62x14 ball bearing fnob, trend b95 imperial zz metal shielded ball bearing 14 x 38 x 18, pro auto darkening solar welders welding helmet mask shield arc tig mag hood, certified solar auto darkening welding arc tig mig mask helmet shield brand new, 10pcs 6203rs shielded deep groove radial ball bearings 17mmx40mmx12mm, simplicity bronze slinger bearing shield for shakeouts serial 410sode192, simplicity bronze slinger bearing shield for shakeouts serial 510sode2155, cat e2133 bearing double shield chain tensioner; 746901561 lam tcp 9600, cat 235001103 shield bearing for pg 5 no6, 5 cnc 12 drive shaft support bearings r8zz shielded premium bearing abec3, bearing shielded radial 17mmid x 35mmod x 10mmw ntn 60032, bearing shielded deep groove radial ball ss 10 x 19 x 5mm vat 61800zz, ntn 6804zz2a deep groove ball bearing double shielded lot of 2 bearings nos, bearing pkg 4 deep grove shielded extra thin metric od 18mm id 12mm 4mmw ezo 680, lot of 2 skf 6200 2zjem radial ball bearings deep groove style double shield, solar auto darkening welding arc tig mig mask helmet shield, ntn 6916zz2a ball bearing 6916z deep groove shielded nos, 5pcs 9mm x 4mm x 4mm double shielded ball bearing for rc model car, 3pcs 8mm x 4mm x 3mm double shielded bearing for rc model car, 1 pack of 4 amat 306090140 bearing deep groove two shield, new nsk 6311 2zr metal shielded deep groove ball bearing 55x120x29mm, new fag 6311 2zr c3 metal shielded deep groove ball bearing 55x120x29mm, amat 004076579 bearing shield fixed abbrasive 300mm new