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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.

Boring Head with Straight Shaft

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Product Description

The Straight Shaft Boring Head was designed for those who are using an ER-16 or 3C headstock. Our standard boring head  has a #1 Morse tapered shaft and is held in the 3/4 x 16 headstock spindle with a drawbolt. This holder has a straight shaft and is held in the spindle using a 3/8″ collet.*

A boring head provides a means of accurately machining almost any size hole. It can also machine stepped holes for seating bearings and internal grooves for lock rings. Boring tools cut like lathe boring tools, with the difference being the tool moves rather than the work.

*NOTE: Sherline Products does not sell 3/8″ collets used with the ER-16 or 3C headstock spindles. Those are available through Hardinge Inc. or other tool supply sources.

What’s included:

The Sherline straight-shaft boring head comes with a hex key for making adjustments; however, the cutting tools are not included. The boring head is designed for use with standard 3/8″ (10mm) diameter shank boring tools. For best results, the length of the tools should be kept to a minimum. You will find that a short tool gives you less chatter, and it will be easier to hold tolerances.

Sherline also offers a fly cutter with a straight shaft for use in ER-16 or 3C headstock spindles.

 

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The improper use of machine tools and their accessories can result in serious injury. Before using this tool, thoroughly read the instructions and make sure you understand its proper and safe use.

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Always wear safety glasses when operating machine tools.

Download PDF 3054 Inch Instructions

Instructions PDF Download

Download PDF 3049 Metric Instructions

Instructions PDF Download

31070 Gear drive pin
31560 4-40 x 7/8″ SHC Screw (P/N 31561 metric)
31570 Adjustment Dial, Boring Head w/Screw (31575 metric)
31580.375 Boring head, primary (top w/3/8″ straight shaft)
31590 Boring head, secondary (bottom)(P/N 31591 metric)
40340 10-32 x 1″ SHC Screw
40570 3/32″ hex key
40330 10-32 x 5/8″ SHC Screw