A bearing is a machine element that constrains relative motion to only the desired motion, and reduces friction between moving parts. The main use of bearings is to support a rotating shaft. There are several types of bearings, with different principles and rolling elements, for example: Ball bearing and roller bearing.
Questions tagged [bearings]
144 questions
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Is there such a thing as a sand-proof bearing?
I am working on a piece of art that has parts that rotate slowly, at about 1RPM, thanks to a couple of bearings. There is a possibility that it might be installed beside a beach for about a week. The problem is that sand and bearings do not play…
Steve
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Bearing to allow a sphere to roll freely
I want to know what bearings might allow a sphere (5cm diameter) to roll in-place most freely.
The closest mechanism that matches what I might want to achieve is a "ball transfer", I believe the term is.
I have been unable to find:
- an explanation…
Jodes
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Radial vs thrust bearings for assembling a lift mechanism
I'm a total novice and self taught, currently designing and building a workbench for woodworking with an adjustable height top. This is the last major part to finish and I'm having trouble determining which bearing configuration to use.
EDIT: I…
Gisto
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What are 1 ball and 2 ball bearings?
When looking at various small fans (like those found in a computer or the bathroom) you often see in their specifications the type of bearings they use. And the typical values there are either "sleeve bearing", "1 ball bearing" and "2 ball…
Vilx-
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What is the typical rpm variance-tolerance of a roller bearing?
I have a high speed roller bearing rated at 3000rpm.
I know in the electrical industry that tolerances of around 10-15% are built into components so that they continue working in fluctuating electrical environments.
Is there a similar tolerance in…
TheLegendaryCopyCoder
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Why does the taper on tapered-roller bearings help support axial loads?
My assumption is that the taper/conical shape helps separate pure axial/radial loads into a combined load.
For example, a pure axial load should also produce a radial load component in the conical/Timken style bearing.
Is this correct?
Bearingman99
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How/why lubricating a rolling bearing would make them spin less time (dissipate energy faster)?
I have lubricated the ball-bearings of two hand spinners (the anti-stress toys) and contrarily to my expectation the time they keep on spinning has been divided by four.
One fact I have noticed, the rolling bearings now makes almost no more noise…
Stephane Rolland
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How does an air-bearing "pre-load" work?
I've been reading into air bearing recently and keep coming across the term "pre-load". References online and wikipedia both state that a pre-load helps stiffen the bearing such that their is less variation.
I'm guessing the pre-load ensures the…
Izzo
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double effect roller bearing or two needle roller bearing
Good morning,
I need to source 30 or 50 bearings such as the picture. This is a double effect roller bearing and the mid washer is drilled as you can see.
Shaft diameter: 17mm
Height: 22.26mm
Speed is not an issue
This is not standard and very hard…
vib
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How to design a rotating base?
I have no formal training or professional experience as a mechanical engineer. I would like to design a rotating base that is powered by a motor. I would like to accomplish the following:
Smooth, quiet operation
Self-locking (as could be…
lostinthecloud
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How to Keep Bearings From Binding
This is a capstan for a stringbender for an acoustic guitar. When actuated, the String Wheel turns about 15-18 degrees. It does NOT spin, but simply turns, then is pulled back to "zero" when released.
My problem is that when I tighten the nut…
jegenes
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What equipment do I need to install a bearing?
I am not a mechanical engineer :) I feel much better with electronics, but I have a project in your domain now.
So, I have an aluminum housing, a steel bearing and an aluminum axis. I need to put them together. In my basement. They are designed to…
Gregory Kornblum
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How this adapter inside the bearing is called? How to find/make a replacement?
This is an ABEC7 bearing with a 12 mm hole and a 19 mm external diameter:
It has a tightly mounted adapter (the black part), which in turn has a 6mm hole and two external diameters: 12 mm (partially hidden in the bearing, partially visible) and…
scriptfoo
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Designing a joint with bearing, how much do I need to protrude for the bearing to stand? With pictures
Hello all I'm designing a joint that needs a bearing to fit central but I'm wondering whether I have to protrude a bit on both parts so there will be some gaps between the bearing and the parts which allowing both components rotate freely.
I don't…
tempo3010
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