Shopsmith Drive Sheave Bearings.  1 set of 2 bearings.  Fits both Gilmar and Poly-V headstocks.  

I buy direct from the factory and pass the savings on to you.

These bearings are made in Japan, not China.  They're far better than the China bearings that are being sold on ebay.  Before you buy look to see what country the bearings were made in.  NTN has been in business since 1918.  Almost 100 in business!  They supply bearings to many industry's and supply other brand names.  Their one of the top 3 bearing manufactures in the world.

Other Shopsmith Bearings are available.  

Technical Specifications

Bearing Type: Radial Bearing

Product Seal: Two Metal Shields (ZZ)

Ball Material: Chrome Steel

Retainer Material: Metal

Quantity: 2 Bearings

Condition: New Inventory From Factory. NTN Brand.

Quality Level: ABEC 3 or Better

Operating  Temperature: Metal Shields Ranges: –20 °F to +230°F [–30 °C to +110°C]. 

Raceways: Finely polished superior finish for long life, and low noise.

Lubrication:   Wide temperature range (-50F to + 300F).