Are the bearings sealed or open on the inside? That is, is the grease merely to keep water out between the bearings, or is it truly lubricating them?
524381
Hi Mike, Great Question - I checked. The grease nipple is inserted into the top of the shaft and hole for the grease extends past the top bearing and is cross drilled below the top bearing. The grease fills the cavity between the upper and lower bearing. The lower bearing has no seal on the top side thus it would be lubricated and the grease would also help to keep the water and dirt out. The top bearing has seals top and bottom. I hope this helps.
14441
Mine doesn't do that, and I'm not a mechanic. Lubrication sounds reasonable, but I don't know. Sorry.
1470593
Bearing buddy holds grease into the pocket formed (around the shaft) by the inner grease seal and the bearing buddy. Make sure that when you install the bearing buddy that you check the rubber on this seal for hardening and cracking - if present, replace it. Having grease in the pocket is where the protection comes from.
1267859
Mine got a little tight, I may have put it away wet and caused some rust. I lubricated it lightly with penetrating oil, worked it in for a while, and now it works as good as new. If you're worried about food safety, you could try the same with mineral oil, but the penetrating oil is thinner and will be easier to get it worked in.
1182620
They do not have sealed bearings. See http://www.shimano.com/publish/content/global_cycle/en/us/index/products/pedals/mountain/product.-code-PD-M324.-type-.pd_mountain.html for an exploded view. You need a special wrench to disassemble/reassemble them as well. the problem is that the tool needed costs as much or more than the pedals themselves! So unless your LBS has the tool, it is cheaper to just buy a new pair. Been using these since 2009, they are awesome, no issues.
175866
No these are not sealed bearings. you can see the bearings. Please see the following link for sealed bearing rollers: http://www.amazon.com/gp/offer-listing/B00DQCOY3I/ref=ag_xx__xx/?condition=new
1794480
When the unit arrives it is not lubricated with oil or grease. I always store the bearings and blades in food grade oil. The first little bit of the ground meat has black residue from the bearing. This is normal. I always discard that portion. I am not sure as to whether it would be ok to consume or not, but it doesn't look appealing. Hope this helps.
2227227
That's a good. ? Lol. I'm a tech of 10 + years and I never greased. I just push the ball of the fitting down and pour a few drops of lite oil in it.
671666
It has a sealed bearing, but there is a place to oil it. Runs quietly. Hope this helps.
116127
I strongly disagree with the WD-40/dry-lube solution as that would likely catch more dust and debris than leaving the bearings dry. Just cleaning them should be sufficient, if one seems to be catching, rotate them using a pencil eraser to loosen any debris that make be under them. This worked well for me for many years with the old style Trackman (I'm about to replace it) and I say this as a computer tech with 30 years experience.
1980217
I bought these pedals and the first thing I did was to take the bearings out and add grease. When I first got them one of the pedals was tight and made noise. Adding grease seemed to help. Hope this helps.
1515755
That depends on the purpose of the bearing and the environment you live in. I live down in the South where it is damp and the humidity is always lurking around. Therefore, you might want to have a grease fitting for your sealed bearings. If you are using these bearings on spindles on a lawn mower cutting deck I would definitely put grease fittings on the spindles and grease them often. Always blow your deck off with a blower, never wash your deck! Sealed bearings can be greased. On mower deck spindles with zirk fittings the seal is removed on the inside that face each other and the outside seal stays in place, therefore the grease can flow to all parts of the bearing.
879317
I don't think they are. You have to install the zero fittings, and I don't recall seeing any grease . I greased mine after they were on the car to ensure they were properly lubed.Additionally, it is not a sealed joint, meaning periodic lube is required.
478037
I have never lubricated the o-ring, just made sure the seat is *absolutely* clean and dry before I screw the housing back together. But the only other place I've ever dealt with o-rings is underwater camera housings, so I may be missing something on these Big Blue cylinders.
879315
I can't quiet remember if there was no lube or very little, but it needed grease. I filled them up while installing them.
1515757
sealed bearings are just that, sealed, they can not be greased, and the seal keeps the grease in and imperfections out, when you think they make a noise, replacement is in order, good luck, Dick
582383
I would say yes. I have not seen grease coming out of bearing, unless I added grease (usually molly type in the past). The reason I swapped out was to lower the noise level of my metal garage door. The nylon rollers really quieted the noise.