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Important Update Regarding Sherline Products
October 20, 2026
We would like to share an encouraging development regarding the future of Sherline Products.
We are currently in discussions with an American manufacturer regarding the potential purchase of Sherline’s intellectual property and remaining inventory. The goal of this proposed acquisition is to preserve and revitalize the Sherline brand while providing continued availability of replacement parts, accessories, and machines for our valued customers.
As these discussions progress, we have agreed to temporarily suspend accepting new orders, effective October 19, 2026. This will allow us to preserve our remaining inventory while negotiations are underway.
Although no final agreement has been reached, we are hopeful that this opportunity will provide a positive path forward for the Sherline name and the customers who have trusted our products for more than five decades.
We sincerely appreciate your patience, understanding, and continued loyalty during this transition. We will share additional information as soon as it becomes available.
Our greatest hope is that the Sherline legacy of quality, precision, and American craftsmanship will continue for generations to come.

Karl Rohlin III and Charla Papp
Co-Owners, Sherline Products, Inc.
Sale!

Sherline/Criterion Boring Head Arbors

The Criterion S-1-1/2″ boring head is not available from Sherline Products and is shown for reference only.

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About the Sherline/Criterion Boring Head Arbors

This arbor/holder was suggested to us by one of our customers, Wayne Neilson.

We designed these two boring head arbors and holders for use with the Criterion S-1-1/2″ boring head on our Sherline milling machines.

The Criterion boring head is made in the USA and has been around for a long time. It is well made and very precise, making it a perfect fit for our machines.

The Morse #1 to 7/8-20 Criterion Boring Head (P/N 12131) mounts directly into the Morse #1 taper on our standard headstock spindle with our 1/4-20 x 5″ drawbolt and washer (included).

The End Mill Holder to 7/8-20 Criterion Boring Head (P/N 12141) threads onto our ¾-16 Morse #1 spindle thread (it comes with an included Tommy bar).

Choose the arbor or holder that best fits your needs. Then thread on your Criterion S-1-1/2″  boring head, and you are ready to start boring perfect holes.

P/N 1213 M#1T Arbor
Part No. Description Quantity
12131 Morse #1 Arbor to 7/8-20 Criterion Boring Head 1
30881 1/4-20 x 5″ drawbolt 1
30882 1/4-20 Bolt Washer-Oxide 1
40580 Tommy Bar 1
P/N 1214 End Mill Holder
Part No. Description Quantity
12141 End Mill Holder to 7/8-20 Criterion Boring Head 1
40580 Tommy Bar 1