Pillow Block vs Plummer Block: Which One to Order
Pillow block vs plummer block: a one-piece UCP unit, or a split housing with a spherical roller bearing on a sleeve. Shaft, center height and RFQ lines.
Bearing Guides
Practical guides on bearing types, designations, seals, clearance, installation and sourcing from China.
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ZZ vs 2RS Bearings: Which Seal to Write on Your Order
ZZ metal shields or 2RS rubber seals? What each suffix means, how they differ on dust, water and speed, and what else to write on the order.
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Brass Cage Bearing Samples: Weigh Them Before You Order
Brass vs steel and polymer bearing cages: what each suits, the M and F suffixes, and how we caught a hollow brass cage in 2016 by weighing samples.
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Bearing Brinelling: Mounting Damage, Transit Damage or a Bad Batch?
Bearing brinelling leaves dents at ball spacing. How to tell mounting dents from false brinelling and a bad batch, and how to mount the next bearing.
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Bearing HS Code: 8482 for Ball, Tapered and Spherical Bearings, 8483 for Pillow Blocks
8482.10 ball bearings, 8482.20 tapered, 8482.30 spherical roller, 8483.20 pillow blocks, 8483.30 housings: six-digit codes and what to check with a broker.
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GCr15 vs 52100, SUJ2 and 100Cr6: One Bearing Steel, Four Names on a Spec Sheet
GCr15 vs 52100 bearing steel: GB, ASTM, JIS and EN composition limits side by side, where they differ and what to check on a material certificate.
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Static vs Dynamic Load Rating: What C and C0 Mean on a Bearing Spec Sheet
Static vs dynamic load: what C and C0 mean, how the dynamic load gives L10 bearing life, when the static load decides size, with real catalog rows.
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UCP, UCF, UCFL and UCT Bearing Full Form: What Each Letter Means
UCP bearing full form: a set screw insert in a P pillow block housing. What UCF, UCFL and UCT mean, plus the series digit, bore code and suffix letters.
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Bearing Steel Hardness Test: A 2007 Case on a 48548/10 Order
In 2007 a Pakistani buyer sent us a cheaper sample for a 48548/10 order. A hardness check, not a look or a spin, showed it was not bearing steel.
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Types of Hub Bearings Used in Agricultural Machinery
Disc harrow bearings with square or round bores, flanged disc hubs, tapered roller pairs and hex bore bearings: where each fits and how to identify one.
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Insert Bearing Inner Ring Size: A 2013 Case We Walked Away From
In 2013 a distributor forwarded a rival's signed PI at a price we could not match. We let the order go. It came back with an undersize inner ring.
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Thrust Bearing Types, Sizes and How to Specify One
How a thrust bearing takes axial load, the thrust bearing types from ball and cylindrical to spherical and thrust needle, and how to select the right one.
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Carrier Bearing Guide: Parts, Wear Signs and Inquiry Specs
What a driveshaft carrier bearing (center support bearing) is made of, the ball bearing inside, wear signs, replacement cost and the specs for a fitment.
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Z2V2 Bearing Codes: Noise Grades Are Not Precision Classes
A z2v2 code grades bearing vibration and noise, not precision. What Z1V1, Z2V2 and Z3V3 mean. Why a P class is a separate spec, and how to write both.
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AC Compressor Bearing Noise: A Case From the Canton Fair
Why a car ac compressor bearing can be too noisy, how to tell a bad clutch pulley bearing from the compressor, and the nine sizes we supply.
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51108 Bearing Dimensions and Matching the Spec to the Duty
51108 bearing dimensions: 40 x 60 x 13 mm (1.575 x 2.362 x 0.512 in). How it differs from 51208 and 81108, and which washer goes on the shaft.
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How to Choose a Wheel Hub Bearing: Tube vs Forged Rings
How to choose a wheel bearing or hub assembly: the three hub generations, tube vs forged rings, replacement signs and what to put in an inquiry.
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Bearing Lubrication Guide: How Much Grease Is Right
Why too much grease causes as many problems as too little, the general fill rules for sealed and open bearings, and one order we got wrong.
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Bearing Internal Clearance: Why Tighter Is Not Better
What bearing internal clearance is, the C2, CN, C3 and C4 groups with real numbers, and two orders that show why a tight bearing is not a mark of precision.
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Ball Bearing vs Roller Bearing: How to Choose
Ball bearing vs roller bearing: the practical difference in contact geometry, load direction and speed, and where each one is normally used.
Trending now
- Pillow Block vs Plummer Block: Which One to Order
- ZZ vs 2RS Bearings: Which Seal to Write on Your Order
- Brass Cage Bearing Samples: Weigh Them Before You Order
- Bearing Brinelling: Mounting Damage, Transit Damage or a Bad Batch?
- Bearing HS Code: 8482 for Ball, Tapered and Spherical Bearings, 8483 for Pillow Blocks
- GCr15 vs 52100, SUJ2 and 100Cr6: One Bearing Steel, Four Names on a Spec Sheet
- Static vs Dynamic Load Rating: What C and C0 Mean on a Bearing Spec Sheet
- UCP, UCF, UCFL and UCT Bearing Full Form: What Each Letter Means
