The Sherline End Mill Holder 1/4″ - 1/4 is designed to enhance the functionality of milling machines by securely holding end mills in place. This holder screws onto the threaded end of the mill spindle and utilizes a single 10-32 set screw to ensure the end mill remains stationary during heavy cuts, providing more support compared to a collet. The design allows for the use of longer or double-ended end mills, increasing the versatility of the milling machine.
This end mill holder is particularly beneficial for CNC operations, as it facilitates a quick-change tool system. By keeping cutters mounted in their own holders, users can swiftly switch between tools without altering the tool length values in the CNC program. This feature is advantageous for maintaining consistent tool diameter and length values, streamlining the machining process.
The holder is compatible with various special-purpose cutters, such as those for key slots, dovetails, and corner radii, which typically have 3/8″ diameter shanks. This compatibility further extends the range of applications for which the milling machine can be used.
Note: The thread pitch diameter on both the end mill holder and the headstock spindle is held to a tight tolerance to minimize runout. It is recommended to apply a drop of light oil on the threads before initial use, as some holders may fit tightly at first.
1x Sherline End Mill Holder 1/4″ - 1/4
Screws onto the threaded end of the mill spindle
Holds end mills with a single 10-32 set screw
Provides more support area compared to a collet
Uses a 3/32″ hex key to tighten the 10-32 set screws
Allows use of longer or double-ended end mills
Enables holding of popular cutters like key slots, dovetails, and corner radii
Quick-change tool system for CNC operations
Thread pitch diameter held to a tolerance for low runout
May fit tight initially; recommended to use light oil on threads
WARNING: This product can expose you to chemicals including lead and lead compounds, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to: www.P65Warnings.ca.gov.
Refund Policy
If you are not satisfied with a product purchased from the Site, you may request a return within 30 days from the delivery date, unless the product is listed under the Return Exceptions below or is subject to specific return conditions noted on the product page.
This return policy also applies, as a minimum standard, to products sold and fulfilled by third-party vendors through the Marketplace.
Returns under this policy concern non-defective products. In the case of a confirmed manufacturing defect, remedies are handled under the Warranty terms, at the Vendor's discretion. See the Warranty section.
Return Conditions
To qualify for a refund under the 30-day return policy, all of the following conditions must be met:
A valid Return Authorization (RA) number must be obtained prior to returning the product. Returns without an RA number will be refused.
The RA number is valid for 30 days. The returned item must be received within that period.
The RA number must be included with the return.
Products must be returned in unused, unmodified condition (e.g., no scratches, alterations, missing parts, or signs of installation/use) and in their original packaging, suitable for resale.
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A $100 cleaning fee may apply to domestic robots returned in used or unclean condition.
A 20% restocking fee may apply to large-quantity returns of items ordered specifically for the customer from the manufacturer or not part of RobotShop's standard inventory.
Return Exceptions
The following products are not eligible for return or refund under this policy:
Used, damaged, or modified products — Items that show signs of use, wear, or alteration, making them unsuitable for resale.
Consumables — Use and wear-and-tear components, altered or depleted through use (e.g., batteries, belts, brushes, gears, filament, tires, disposable bags, lubricants, greases, waxes, etc.). Not eligible for return once opened or used.
Perishables — Goods liable to deteriorate or expire rapidly. Not eligible for return.
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Build-it-yourself products and items requiring customer assembly — Including robots & kits, robot parts, and other products requiring assembly or soldering. Not eligible for return once assembled, soldered, or installed.
Digital Goods, Software, and Apps — Final sale only, due to licensing restrictions.
Clearance Items — Products identified as clearance or final sale, including end-of-life or discontinued items.
Custom-made, personalized, or special-order items — Products manufactured, configured, adapted, or built to the customer's own specifications and requirements.
On-Demand Items — Standard catalogue products not stocked by RobotShop and ordered specifically to fulfill a customer request.
While the same return policy applies, these orders require a separate contact process for returns.
RobotShop Fulfilled Orders → submit a support ticket from your account under My Support Tickets.
Marketplace Vendor Orders → submit a ticket from your account under My Marketplace Tickets to contact the vendor directly.
Note: Marketplace vendor products are normally labelled with SKUs starting with RM, and identified on the product page with the mention "Sold and fulfilled by [Vendor Name]".
