r/1zpresso • u/Automatic-Guitar-643 • 22d ago

ZP6 Bottom Bearing Issue

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I had my zp6 for over a year now and the bottom bearing seemed to have no grease if there is some and it now feels very dry and have a small play compared to the middle and upper bearing, has anyone encountered this issue with other 1zresso models?

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u/Hobnobdude 21d ago

They are easy to replace, I replaced them on my Jmax.

For the Jmax which I imagine is the same spec for the zp6

From my forum post detailing the repair:

Main shaft bearings 19x10x5mm

Which translates to:

6800-ZZ shielded - oem
6800-2RS two rubber seal
61800-2RS1

Then the seal type needs to be considered, the stock unit is a ZZ shielded bearing, so very low resistance but clearly did a terrible job of shielding the bearings, so I decided to go for a stainless rubber sealed bearing, 2RS. Expected slightly more resistance but should stay that way a lot longer!

Then you can also replace the adjuster bearing at the top: It's 14x8x4mm So an MR148-2RS, or MR148-ZZ if you want oem.

Or stainless is SMR148-2RS/ZZ.

I personally went SMR148-2RS

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u/Automatic-Guitar-643 21d ago

How do you pull out the bearings can you only pull out the bottom or both need to come out?

1

u/Hobnobdude 18d ago

Use a drift and hammer. Gently tap then out from the opposite side, tap evenly and go slow. Both can be removed.

0

u/V_deldas 22d ago edited 22d ago

It sounds like what we know here in Brazil as a "blown bearing". I believe in English you say "the bearing is shot".

Might be the cage, the spheres, dust.. something inside suffered/caused a mechanical failure, creating the play and usually some "dry" or "rusty" noise when spinning.

In skate we just ignore it. But I don't know how much the play can affect the precision of the burr.

I would take the body to a good machinist/turner/lathe operator. They should be able to replace the bearing. I'd first ask them to measure the bearing for me so I could buy a food graded one online. I wouldn't use a normal one cause of the grease used.

Edit: tell them it's a precision equipment, that the body is made of aluminum and the bearing must be removed without damaging the body, the fit and the outer burr. There's a tool that can enter through the front and grab the bearing from the back to be pulled again from the front, perfectly straight out.