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Full complement needle bearings have higher load ratings and lower speed ratings than the same sized caged needle bearings. Often times one type will be carelessly substituted for the other and this can create many future problems.

Could you use a one way or clutch bearing on the output of your reducer to keep it from backdriving? Emerson-EPT may be a good company to talk to on this since they offer both speed reducers and a variety of non-electrical clutches.

I have been very pleased with the B5V sheaves. You can run A, B, or 5V section belts on them so it cuts down on the amount of spare parts you have to stock. You can't use banded belts with them. Combination sheaves have been used successfully for years. The belts ride in different parts of the...

You may want to look at www.pacific-bearing.com and see what they have to offer. This may be an option for you. Their catalog also has very good examples of proper bearing spacing and loading. How does running a linear bearing open side up as you describe change the bearing's capabilities...

MB Manufacturing was bought by Rexnord. They are very high quality bearings and are made by MB/Rexnord. MB, especially before Rexnord bought them, always had suprisingly good prices considering you are getting a bearing made as good as any mounted unit. Boston Gear does not make bearings...

I originally missed that the equipment is run vertically. A ball bearing 4-bolt flange with high thrust loads at that speed is not a good choice. Rexnord, who makes your Omega coupling, also makes very good spherical bearing units which can better handle your loads. The speed is another...

The limiting speed for your bearings is 4700 RPM. Your speed being above 75% of that limiting speed often makes the bearing manufacturer nervous and is worth consulting directly with them. I don't see where it said how close the propeller is actually mounted to your bearings but a 20"...

There is a company in Augusta Ga, actually Grovetown, called Bearing Distributors. They are great to work with and have done miracles for me. If they can't find the bearings then probably nobody can.

Many racecars use 8mm HTD belts for the dry sump oil system. If this is similar to what you're doing you may find the pulley is available out there without it having to be made.

Here's some info: http://www.ntn.ca/howitsmade.wmv

http://www.cgc.co.jp/konan/english/welcome.html

I know Browning makes a FB900 series (and others)made of ductile iron with 3-1/2", 3-15/16", and 4" bore sizes. QM offers both steel and ductile iron in the bore range you're after. Try Browning @ www.emerson-ept.com or QM @ www.qmbearing.com.

These are generic part numbers for a series of pillow blocks and four-bolt flanges. For a 1" pillow block your part number would usually be UCP205-16. "05" being the physical housing size and "16" being shaft size in sixteenths of an inch. A 25mm pillow block is...

Does snapidle still offer these for belts? I remember when the belt idlers came out and they were not too great. I know snapidle had even quit pushing the belt idlers for a while--are you sure these are now available and if so have you used them? The chain idlers are very good...

Just guessing, but I think what you're looking for is just proper shaft and housing fits. These help determine your final internal clearance of the bearing. We don't usually talk "preload" when we're talking about single row radial ball bearings. If you need shaft and housing fits...

NTN has an excellent reference card showing preload values for sphericals and they also print a very in depth technical catalog. I use them all of the time. They also have good application engineers who have always been very helpful to me. You have to be able to supply them with enough...

The static and dynamic load ratings listed in bearing catalogs are load values that cause permanent deformation on the bearing races. I've been told by NTN engineers you should try to design your bearings at 10% to 20% of these published load ratings.

10 tons of force per inch of shaft. This is the rule of thumb Power Team (OTC) uses for recommendations.