Sherline Dovetail-Base Headstock w/ 90-Volt DC Motor 3/4-16 #1m Taper
Features precision-engineered dovetail base for stability
Constructed from durable 6061-T6 aluminum
Offers a variable speed range from 70 to 2800 RPM
Includes lifetime lubricated Class 5 bearings
Utilizes a 90-Volt DC motor with significant torque
The Sherline Dovetail-Base Headstock w/ 90-Volt DC Motor 3/4-16 #1m Taper is a precision-engineered component designed for industrial applications, drawing its design from the headstock used in Sherline lathes and milling machines. Constructed from extruded 6061-T6 aluminum, it features a durable black anodized finish. This headstock is equipped with a 3/4-16 #1 Morse taper spindle, which is supported by lifetime lubricated Class 5 bearings. These bearings are known for their accuracy, tighter tolerances, and smoother operation, allowing for a continuous speed of up to 4,000 RPM, with the potential to reach 10,000 RPM with adjusted preload settings.
The headstock's dovetail base is designed to fit seamlessly with Sherline's steel dovetailed bed and column materials, ensuring stability and precision during operation. It includes a brass gib for secure attachment and a mounting point for a saddle nut on Sherline leadscrews. The spindle is equipped with a dust cover washer to protect the bearings, although it is not entirely sealed, making it unsuitable for environments with excessive dust or coolant exposure.
The accompanying 90-Volt DC motor provides significant torque at low RPMs, which is crucial for machining tasks. This motor is quieter and smoother compared to equivalent AC/DC motors, offering a variable speed range from 70 to 2800 RPM. The motor's speed control system is versatile, accepting inputs from 100 VAC to 240 VAC and converting them to a 90V DC output. The motor also features a two-step V-belt pulley system, allowing for adjustments between high-speed, low-torque and low-speed, high-torque operations.
Note: Ensure the spindle and setup are adequate and safe for the intended operation, as the spindle is not designed for high RPM rotation of long or out-of-round parts.
1x Sherline Dovetail-Base Headstock w/ 90-Volt DC Motor 3/4-16 #1m Taper
1x Preload Nut
1x 3/4-16/#1 Morse Spindle
1x Bearing Dust Cover Washer
1x 0-32 x 5/8″ Socket Head Cap Screw
Class 5 Headstock Bearings
#2 x 1/4″ Self-Tapping Phillips Head Screws
1x 10-32 X 1/4″ Flat PT Set Screw
1x 10-32 x 1/2″ Socket Head Cap Screw
1x 2-Step V-Belt Pulley
1x Headstock Case, Dovetailed Base
1x Industrial Headstock Spacer
1x Saddle Nut Attachment Plate
1x Industrial Brass Gib
Spindle base size: 3.50 x 3.375 inches (88.9 x 85.7 mm)
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.
Shipping fees are non-refundable. Return shipping costs are the responsibility of the customer, except in cases of a product confirmed defective through RobotShop's troubleshooting process or of a verified shipping error by RobotShop.
Refunds are processed within 7 days after receipt and inspection of the returned item.
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]".
