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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.
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Image shown is a representation only. Actual product may vary.

ER-16 Collet Nut Spanner Set

ER-16 Collet Nut Spanner Set

SKU: 65027 Category:

Product Description

About the ER-16 spanner set

The Sherline ER-16 Collet nut spanner set includes two wrenches. One has a pin that engages one of the holes in the Sherline spindle to keep it from turning while the nut is tightened. The other is a hex wrench sized to fit the special ER-16 nut (nut not included). This wrench eliminates the need for the proper size metric wrench and a Tommy bar when loosening or tightening the ER-16 collet nut. The pin tool provides a better grip in your hand and better leverage than the Tommy bar. The tools are cut from a 1/4″ steel plate and have a tough, black oxide coating to keep them from rusting.

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The P/N  65027 set is used to adjust the ER-16 collet nut on Sherline machines fitted with an ER-16 spindle. Click on the image for a larger view.

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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 65027 PDF Instructions

Instructions PDF Download
Part No. Description Quantity
65024 ER-16 Spindle holding spanner 1
65025 1″ Hex wrench 1

Related products

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    3.1″ ER-16 3-Jaw Chuck
    For use on the ER-16 headstock only Not for use on the standard headstock that comes on all Sherline Machines

    Sherline offers their 3.1" three-jaw and four-jaw self-centering chucks with a 22 x 1.5 mm threaded hole for use on Sherline's optional ER-16 spindle nose. They can also be used with certain other ER-16 spindles that use the 22 x 1.5mm thread for the collet nut.

    Self-centering chucks offer a quick and convenient way to hold a workpiece while it is turned on the lathe. A chuck can also be clamped to a mill table to hold a part for milling. Sherline manufactures our own chucks to a high degree of precision on CNC machines. The jaws are ground and fitted to each chuck by skilled technicians to assure maximum accuracy. Runout is specified to be .003" or less at the chuck jaws.

    NOTE: The chuck should not be used in applications where spindle speed exceeds 3000 RPM. If purchasing any of these chucks for use on a non-Sherline ER-16 spindle, confirm that the spindle nose thread is 22 x 1.5 mm before purchasing. The Sherline chuck has a collar that is machined flat at the back to seat against the face of the Sherline ER-16 spindle. This may not be compatible with some non-Sherline ER-16 collet adapters or industrial tool holders. Runout accuracy cannot be guaranteed unless used with a Sherline spindle.

    Jaw Options
    • For those who have jobs where speed and ease of use are more important than maximum accuracy and want a chuck that is loose right from the start (No extra charge). Add the note “loose jaws” to the comments box below
    • Soft (not hardened or machined) steel jaws are also available when you build your own chuck.
    $212.37 Read more
    1078_er16_pic
    1078_er16_pic
    3.1″ 4-Jaw Chuck – ER-16
    For use on the ER-16 headstock only Not for use on the standard headstock that comes on all Sherline Machines

    Sherline offers their 3.1" 4-jaw self-centering chucks with a 22 x 1.5 mm threaded hole for use on Sherline's optional ER-16 spindle nose. They can also be used with certain other ER-16 spindles that use the 22 x 1.5mm thread for the collet nut.

    Self-centering chucks offer a quick and convenient way to hold a work piece while it is turned on the lathe. A chuck can also be clamped to a mill table to hold a part for milling. Sherline manufactures our own chucks to a high degree of precision on CNC machines. The jaws are ground and fitted to each chuck by skilled technicians to assure maximum accuracy. Runout is specified to be .003" or less at the chuck jaws.

    NOTE: The chuck should not be used in applications where spindle speed exceeds 3000 RPM. If purchasing any of these chucks for use on a non-Sherline ER-16 spindle, confirm that the spindle nose thread is 22 x 1.5 mm before purchasing. The Sherline chuck has a collar that is machined flat at the back to seat against the face of the Sherline ER-16 spindle. This may not be compatible with some non-Sherline ER-16 collet adapters or industrial tool holders. Runout accuracy cannot be guaranteed unless used with a Sherline spindle.

    Jaw Options
    • For those who have jobs where speed and ease of use are more important than maximum accuracy and want a chuck that is loose right from the start (No extra charge). Add the note “loose jaws” to the comments box below
    • Soft (not hardened or machined) steel jaws are also available when you build your own chuck.
    $258.83 Read more