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radial bearings

  • Thread starter Thread starter Jeffcott
  • Start date Start date
Focus said:
but are you sure of free bearing tolerances? usually to avoid lamination of the seats, the uncertain or forced coupling should be done on the ring with the rotating load, then anyway, a "something" that ensures that the bearing does not go out should be put.

Hi.
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Since jeffcott puts two shoulders to hook the rollers to the frame I would say that they are just these shoulders to do as axial clamp for the bearing. I would like to recall x the umpteenth time that it is costing a heritage this tape....so it is good to minimize the processing, so no extra seeger on the free side.

the right bearing is what you have to move both if you stretch the shaft and if you stretch the roller.

This tape from a carpentry work is becoming a set of precision mechanics and in a while we will say that it must be rectified all and lap with tolerances of 1 micron.

for aesthetic factor even with the bearings outside you could have the same visual impact.
 
Jeffcott said:
I asked how much the cloth of the tape is drawn as I must determine how long this will have to be. I don't think it should be 1106.97 mm because it has to be tense cmq, right?
Click to expand...
the stretching of the tie rods, that is their stroke goes from 0.1 to 1% of the basic development of the tape according to the characteristics of the tape itself.
 
meccanicamg said:
skin

the right bearing is what you have to move both if you stretch the shaft and if you stretch the roller.

skin
Click to expand...
the right bearing is likely to move out of the seat and on the other hand, it must flow into the tree where the coupling is uncertain instead of free.

Hi.
 
Focus said:
the right bearing is likely to move out of the seat and on the other hand, it must flow into the tree where the coupling is uncertain instead of free.

Hi.
Click to expand...
We do h7 on the tree and h7 in the hub and don't talk about it anymore? but does not fall out the bearing....there is an iron or aluminum shoulder that is almost to roller wire, so the bearing flows throughout the tolerated piece.

I would like to remind you that the competition that makes crazy rollers with roller bearings does not mount seeger but plant these wire bearings of the end of the roller possibly glued, we plant inside a smooth bar without bearings beats and is thus mounted on the tape frame with the appropriate tensioners. so thermal expansion is more an engineering fisima than a need... If the roller stretches out the bearings that tenth millimeter and who cares:finger:
 
meccanicamg said:
I would like to remind you that the competition that realizes crazy rollers with roller bearings does not mount seeger but plant these roller end wire bearings possibly glued
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In fact, if you do h7 on the seat of the roller you plant? No planting.. . .

As he said focus, having unblocked rotating rings leads to infinite problems, besides the fact that you can lose the bearing on the street, which you would like to solve with a spacer.
 
Well, if the bearing begins to turn against the external shoulder personally I do not think it is a good thing, then everything depends on the hours of use of the tape, if it has to turn every now and then everything is okay, but if it has to work on 3 shifts, 7 days on seven it is good to make sure that the bearing never touches the shoulder. for tolerances I would do h7/k6.

Hi.
 
No space hunter... when you mount the tree on the structure has for strength two plates where there is the puller inside (throat bar) and then the cux does not run on the ground.

However ok, let the cux seat be m7 and that the tree is in h7 but doing so you have to turn the asymmetric tree line back... If I leave it so it fits if to stretch it is the external roller as it is more likely, then here is the revision 02.
 

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then personally I would do the things done as a rule of art, stop the production of anything to save some ten euros does not suit anyone.

Hi.
 
If I leave it so it fits if to stretch it is the external roller as it is more likely, then here is the revision 02.
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You better leave a couple of mm of light between the shaft bar and the dx bearing, so you're quiet even if you stretch the aber, once the bearings are stuck, and enough to report axially on one side.
 
jeffcott but if it was a 300 mm wide tape because we arrived at 341 mm?? You changed the size or there's something that doesn't fit me. tapes and rollers usually have equal width or maximum 1 mm of difference for tape cutting tolerance and possible joint alignment.
 
Forgive me mechanicalmg, I didn't report my change but all in all nothing changes, did I? but do tapes and rollers usually have equal width or maximum 1 mm difference? I saw tapes that have 10 mm of roller discovered on both sides.
 
Jeffcott said:
Forgive me mechanicalmg, I didn't report my change but all in all nothing changes, did I? but do tapes and rollers usually have equal width or maximum 1 mm difference? I saw tapes that have 10 mm of roller discovered on both sides.
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if well centered you do not need to have such scarce tapes according to the rollers.
I have always made 298 tapes on reel 300 leaving 1 mm per side and if well tense and correctly aligned with the curtainrs it is okay.

we put the revision 03 with the 2 mm hunter so we are sure that it fits all the expansions. :finger:
 

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after the necessary changes, thanks also to your support and your well-deserved washes relative to the design:biggrin: , I sent in production the rollers (in fact forced me the boss, the idea was his) so as to test the particular case exposed. I'll take part in the results. I agree with the traditional realization of the rollers, but you will understand my situation:cool:

soon and thank you again for everything!
pierluigi.
 

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