You will be getting ABEC-7 Bearings that are shrink fit to custom ground interference fit and balanced spindles. Runout is .0005" or better. We use premium parts. These bearings are rated to 13,000 RPM. (Patent Pending) You can now get the huge ER50 collet headstock. As you might imagine, it's really only for companies/people with special needs...for precision work holding of larger stock or require the larger through hole. The grinding cost is quite a bit higher for this unique spindle and it requires 4 bearings, so it does represent a larger investment. WE WILL SHIP INTERNATIONAL TO MOST COUNTRIES --- PLEASE ASK ABOUT SHIPPING COST One of the pictures show an example of a ER40 headstock, it's just to show how much bigger the ER50 is...this auction is for the ER50 headstock only (lathe or mill and pulley not included) Do you want the ULTIMATE in Sherline precision work holding? If you are looking for the Sherline ER collet conversion with a widest range of larger collet sizes, you have found it. Your new ER-50 will give you a lot clamping power for material from .394" to 1.339" diameter (12mm to 34mm). The through hole is .820". All ER-50 spindles are mounted with two front bearings and two rear bearings because of the extra mass. We also recommend, at minimum, getting the 600 watt motor upgrade at, preferably the 800 watt, 1,000 watt or 1,400 watt motors. There is more moving mass on this unit. Backside of the spindle is smooth bore 29.5mm diameter. Our ER headstock spindles have a runout of .0005" or better. Does that sound like the precision you're looking for? Get all the benefits of using a precision ER collet system with a through hole of .820". This auction is for the ER-50 preloaded headstock with standard through bore of .820". What you get: A preloaded with new bearings Sherline (tm) headstock casing with a custom ground, hardened and balanced ER 50 spindle, collet nut and spanner. Shipping inside the US is $20. International orders will be extra shipping & handling. The name Sherline is trade marked and only the headstock casing is produced by Sherline. All other components are produce by us. Options - Prices will vary: - 600 Watt Continuous Duty Rated Brushless Motor w/speed controller and mounts (+$397) - 800 Watt Continuous Duty Rated Neodymium Brushless Motor w/speed controller and mounts (+$557) - ABEC-7 Sealed Angular contact bearings (+$349) - Standard RPM pulley (+49) - Industrial headstock (flat base and dovetail) Don't forget to visit our site and sign up for new and upcoming parts and machines updates! Here is sample of what we have coming up.... over the next few months, we will have a Sherline brushless 600 watt motor upgrade kit....new heavy duty extended travel CNC ready X-Y base and Z column w/90 degree head rotation for Sherline(tm), X2, BF20 headstocks and 20,000rpm spindles.....an ultra precision tool holder for drills/boring bar/internal threader for the Sherline lathe and much more... (Frequently, we get asked about the option to upgrade to angular contact bearings and the benefits. In a nutshell, they will be the most accurate, handle the most load and can run at the highest speeds. If you think you might want the angular contact bearing upgrade; it must be ordered with the headstock (it is not easy to retrofit from the standard deep grove bearing to angular bearing). Our angular contact bearings come in one of two ways; sealed and unsealed. If you opt for the unsealed version, you must be careful to lubricate the bearings regularly by removing the dust cap and oiling. The sealed versions are permanently sealed and lubricated. They do no require any maintenance. I'm a big fan of the zero maintenance option!
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