As I mentioned in my previous post... you MUST be sure that you SPECIFY EVERYTHING when ordering a wheel from SungRay. I remember some folks who complained to me that the wheel(s) they got from SunRay were not balanced, and when I asked them if they had specified it, the response was "they should have known to do that!" No they shouldn't! SunRay IS NOT a maker of grinder contact wheels. Their primary business is small military contracts, mostly dealing with urethane "wheels" such as those used to support tracks on tanks, armored personnel carriers, etc. Therefore the standard wheel they make is not "trued", nor "balanced".....if you want precision beyond what they normally produce, you must specify it.
OK, when I order contact wheel(s) from SunRay, I give them the following information. This may not be all inclusive, so again, I strongly urge anyone ordering a wheel from them to carefully think it through and ensure you specify EVERY DETAIL of the specific contact wheel you want. If you forget something, or fail to specify something, its not their fault, and they will not take the wheel back.
Wheel Size: Up to 8" is standard stuff for them, larger than that gets more expensive. I generally order 1 1/2" and 3" smooth faced wheels for building
"The Caffrey Platen" for the KMG.
Wheel Material: Urethane
Hardness: 70 durometer (or whatever hardness you desire) (they sent me a beaded chain with samples of all the various hardnesses they offer)
Wheel face type: Smooth or Serrated
Hub Material: Steel (heavier, but less expensive) OR Aluminum (lighter but more expensive)
Bearings: Both OD and ID (pay special attention to the ID, as this needs to match the size of the fastener that mounts the contact wheel to your tooling arm.)
Wheel Surface type: Flat or crowned
Wheel corners: Sharp/square corners or raduised.
Balance the wheel: If you want it balanced you MUST tell them, and it will cost you more for this operation. I've found that wheels of 6" or less most often do not require balancing. With wheels 8" and larger, I feel balancing is a must.
Any specific requirements for your application: Anything that might be unique or required for what you want to do with the wheel.
When you speak with Shane (or whomever you talk with at SunRay) take the time to go over all the details, and get to know the company. Once you understand that they do not build wheels for, nor know anything about a belt grinder, it will become evident that its in your best interests to be very specific and detailed. I find them very pleasant to deal with, and far less expensive than most who sell standard rubber contact wheels.
Finally, ASSUME NOTHING. These folks make load bearing wheels for a living, not contact wheels, it just so happens that we can use their product for our needs, and its up to each individual to provide FULL SPECIFICATIONS for the product we desire. Once we (at least I) understood that, SunRay became a much less expensive/higher quality source for my grinder contact wheels.
