L5818 Lathe Headstock Spindle Adapter 5/8" Shopsmith to 1" x 8tpi

Quality product!

The above picture of this adapter doesn't do it justice. I was surprised at the quality. This item is a large, heavy weight, finely machined and polished spindle adapter. Both ends screws on smooth. It's top quality at a price that's cheaper than PSI (Penn State Industries), sales it for. And a lot cheaper than other adapters are sold for. View my photos for more detail.It turns true and on center. It doesn't have set screws to lock it to the spindle for reverse operation, but I can drill and tap a couple of holes for set screws if it becomes necessary. It has a solid core on the male threads so you can't use a vacuum chuck.On the female end there are two flat spots for a wrench if necessary. I use an 'Adjustable Slip & Lock - Plumbers Nut Wrench,' its cheap light weight and can accommodate the large size of the adapter (search Amazon # TW408302). The adapter does jamb tight against the chuck and/or spindle so the wrench might come in handy. The nut wrench is also sold at local home improvement centers.This adapter screwed nicely onto my lathe's spindle, right over the shoulder of the spindle to mate with the shoulder of the adapter, as if it was made specifically for my lathe. I did read a magazine Q & A article where someone said their adapter didn't screw on far enough to seat onto the shoulder of the spindle and was asking if he could use a stack of large washers to fill in the gap. The answer was - not a good idea to use washers from the hardware store due to variation in hole ID and thickness from one washer to another. It was suggested to use 'Anti-Lock Lathe Spindle Washers' to fill in any gaps (search Amazon, about $2). Maybe this might help others, but it was not an issue with my lathe.Specs:OD at female end: 2 1/16"Depth of female pocket: 1 1/2"Depth of shoulder inside female pocket: 1/4"Length of male threaded end: 1"Total length: 2 3/4"Wrench size to fit flats: 1 13/16"Weight: 1 lb. 4.8 oz.[See my photos for more detail.]

Fits older model Central Machinery benchtop lathe.

Solid well made perfect fit.

Worked perfect for my shop-smith drill chuck.

I turned it on, shut the shopsmith and as it was winding down, the lathe chuck unwound from the adapter. LUCKILY , I had a hockey puck in the jaws of the chuck and as the lathe chuck came lose, the hockey puck kept the chuck from flying off because as the chuck unwound, the puck pressed against the drill bit I had in place.If this went flying, with its sheer weight could have easily killed or mamed me or anyone around. I believe with he force, it would easily go thru a wood wall and damage whatever is on the other side.I don't know what to do to hold this from spinning off when winding down, please feel free to helpI just applied red loctite to the threads and will wait 24 hours to cure, but would feel better perhaps drilling a hole, tapping it and inserting a set screw, but I really hate to alter the chuck as it is perfect and I may drill thru something that aligns the heads so feel it is above my pay grade to do this.

I bought this used, and I received what looked like a brand new part! The adapter is a heavy beast and sturdy, so it's very stable. Description is accurate. In cause anyone was wondering, The bore inside the adapter does not go all the way through and the opening is on the skinny side. The thicker side lines up perfectly with my wood lathe chuck and once on there, it's really hard to get off unless you put on some kind of anti thread lock (works out for me).

It is heavy duty, big threads, will last through shop abuse