Precision Vacuum Adapter for Powermatic 3520A/B Series Lathes

JT Turning Tools' Precision Vacuum Adapter for the Powermatic 3520A/B series of wood lathes installs directly into the outboard end of the lathe spindle bore.  This adapter is also used on other lathes with a nominal 5/8" spindle bore dimension.  In service for over ten years, the Precision Vacuum Adapter has gained a reputation for high quality and flawless performance with many satisfied users across the country.  Now offered at a very competitive price, this adapter is the best available value on the market today.  Read about the construction of this adapter - here.

PM 3520, adapter installed

Precision Vacuum Adapter installed-3520B, close-up end view

To use the adapter one simply inserts the adapter stem into the spindle bore on the outboard end, installs the appropriate vacuum chuck on the spindle nose, connects the vacuum source and you are ready to go. 

PM 3520, adapter installed

Precision Vacuum Adapter installed-3520B, front view

For specific details of initial configuration and installation of the Precision Vacuum Adapter, please refer to the Installing your new Precision Vacuum Adapter located on the Installation Instructions page.  To view a tutorial illustrating a typical shop-built vacuum system, refer to Assembling A Vacuum Chucking System.

NOTE: This adapter does not work with the original model PM3520 lathe.


See something you don't understand, or have questions?  Contact Us.

Price for the Precision Vacuum Adapter for the PM3520A/B lathe is $109.00.

(domestic U.S. orders only - for International orders, contact us)

Precision Vacuum Hubs

You might also be interested in our companion product, the Precision Vacuum Hub.  This billet aluminum hub is machined to exacting tolerances from aircraft quality aluminum stock, using state of the art CNC machining equipment.  Engineered to give years of service, the Precision Vacuum Hub allows the turner to utilize inexpensive Schedule 40 PVC 2-inch pipe Couplings to create interchangeable vacuum cups of varying sizes.

PM 3520, adapter installed

Precision Vacuum Hub for 1 1/4 x 8 spindle thread

Two views showing the Precision Vacuum Hub mounted on a Powermatic 3520B woodturning lathe

End view showing the face groove receiver for the 2" PVC couplings.  Note the O-ring at the bottom of the groove providing a positive vacuum seal. Side view showing the exceptional machining quality on all surfaces.  Note the six set screws that retain the vacuum cups.
Hub and Cups
Vacuum Hub and PVC pipe coupling Cups - various sizes available

This provides a low cost, high quality alternative to multiple sizes of individual vacuum chucks, while allowing the user to quickly move from one size cup to another.  The cups (2" PVC pipe couplings) are inserted into the precisely machined groove in the face of the hub, sealed by an O-ring in the bottom of the grove, and retained securely with 6 set screws around the perimeter.  Hubs are available in 1"x8, 1.25"x8, and M33x3.5 spindle thread sizes to accommodate most popular lathes.  Learn more about the Precision Vacuum Hub products on the vacuum hubs page.