So I ordered
this.
But the description says a 8mm bearing gearbox... what does that mean exactly ? That it's gonna propel 8mm bbs ?
If it is the case, then I guess I'm bummed out
... what implication would that have game wise ?
If not, then what does the 8mm mean ?
Sorry if it's a stupid question, and thanks in advance guys !
noob
(j/k) some replicas/shotguns shoot 8 mm BBs, but I can't view the link from work (server blocked) so I'll have a look at it later from home
It means that it uses rolling bearings for axles instead of bushings, and the diameter of the bearing itself is 8 mm instead of the normal 6. It does not shoot 8 mm BBs. As far as I know, no AEG shoots 8 mm BBs.
Thank you a lot Hazard for making this clear, I got confused for a minute here.
So... would you mind explaining what are "bushings" and "rolling bearings" ? Does it have something to do with the Piston and the way it pushes the air ?
Sorry, don't mind if it's a pain to explain, I'm just naturally curious and like to understand how stuff works.
Ycare,
This is why you should come to the maintenance session!!
And Google is your best friend.....try
http://www.mechbox.com/
I found that it is a great place to start.
Well every website I found about mechboxes assume that you already know what is a "bushing" and a "bearing". I'm obviously not native English, and those technical terms are first time heard to me. Also, even after using the online dictionary to try understanding, the definitions are still not clear at all.
e.g., bushing:
1. A fixed or removable cylindrical metal lining used to constrain, guide, or reduce friction.
2. Electricity An insulating lining for an aperture through which a conductor passes.
3. An adapter threaded to permit joining of pipes with different diameters.
Right... doesn't give me a clue of what it is precisely, besides being something in the gearbox
Thanks for the website though, it's a great source of information, but couldn't find anything about 6 and 8mm gearboxes
And I wanted to come to the maintenance session, but had other obligations popping in unfortunately... >_<
bearings and brushings:
Bearings- exactly what the axels or your bike have
Bushings- washes or stationary shims that hold the axle in place and allow them to spin
I see, thank you for the lesson FarEast.
So both have a similar roles, but one is basically more efficient than the other it would seem, though requiring more space. Am I wrong ?
So... those rotary axles, where are they ? In the motor ?
Bushings are cylindrical. They create more friction than bearings in general. Most machinery with rotating parts use high density stainless steel bearings. Tank turrets, for example are supported by bearings.
8mm bearings are very strong and create very little friction. They are one of the best options out there. The worst are plastic bushings that you find on older TM guns.
(03-06-2009 11:05 PM)Ycare Wrote: [ -> ]I see, thank you for the lesson FarEast.
So both have a similar roles, but one is basically more efficient than the other it would seem, though requiring more space. Am I wrong ?
So... those rotary axles, where are they ? In the motor ?
Yes they do the exact same job, although bearing are normally used in modified gear boxes such as high speed ratio gear sets or high torque as they reduce the wear and tear slightly. (In all Honesty it's an additional extra that really gives no real benifits)
The bearings are found attached to the gearbox itself and the gears then slot into the holes. (Remember when we rebuilt your gear box and the two halves wouldn't line up?? I was check to make sure all the gears where in the bushings as well)
Now Ycare your gearbox is very unique as it uses bushings & bearings
as you have the caged gear set installed, really the bushings on the gearbox are really just mount pionts for the cage. MikeT the gear box you picked up from me for the M249 is also using the "Modify" caged gear set.
Haaaaaaa, I see !
Okay okay, so it's for the gears ! I understand better now !
Thanks for all, I wake up today a little more educated about all this now
Strange... It seems I forgot to click "Post Reply" for my previous reply.
Anyway, in a mechanical engineering sense, bushings
are a type of bearing surface. That's why I made the distinction of saying "rolling bearings." Bushings are typically low-friction sleeves around axles. Rolling bearings typically ball bearings in addition to the sleeve.
To this day I don't understand why some manufacturers insisted on saving cost with plastic bushings rather than metal ones. I can't imagine that such a critical fault could save much money.
I guess it's the same with Chinese companies that refuse to fork up the extra pocket change to paint their bodies properly.