12″ Deluxe CNC Tabletop Mill System Package A

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Discover the Sherline 8540A, a compact and versatile milling machine designed for precision machining in small projects. With enhanced features for improved accuracy and control, this mill is perfect for both hobbyists and professionals seeking reliable performance.

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Product Description

About Sherline CNC Tabletop Mills

Our CNC tabletop mill is perfect for the customer looking for a mini CNC milling machine to make small, precision parts. All our milling machines are made in the USA, and our customer service is second to none. Although our machines are small, they can produce high-quality precision parts. Our CNC mill will not only cut wood and plastic but is also rigid and accurate enough to cut aluminum and steel parts. This mill is a desktop-size machine with full-size machine precision and accuracy.

Notes on ordering a metric mill

Most of our cutting tools, like center drills, are manufactured in a fractional size. If you have a metric machine with metric holders, like collets or end mill holders, you will need to order fractional holders to accommodate our cutting tools.

Sherline CNC Specification Links

NOTE: Depending upon availability, the actual computer supplied with the system may look different than shown above.

The CNC Milling Machine Package includes:

  • Deluxe Tabletop CNC Milling Machine fitted with saddle oiler, stepper motor mounts, and couplers on X-, Y- and Z-axes
  • A computer with Ubuntu Linux-based OS with LinuxCNC 4-axis CNC software installed
  • Keyboard and mouse
  • 4-axis driver board and power supply installed inside the computer
  • Computer cables to the X-, Y-, and Z-axes are 69″ in length
  • Instruction and utility CD. The CD includes complete instructions and several free utilities to translate CAD files or TrueType fonts into G-code.
  • A blank 4GB USB flash drive
  • 1-year warranty on all components for non-production use. 90-day warranty on CNC and computer-related components.

You supply only a monitor.

Standard equipment for the CNC 12″ Deluxe Tabletop Mill includes:

  • A powerful 90V DC motor with electronic speed controller
  • 12″ base
  • 2″ (51mm) adjustable “zero” handwheels are mounted on each of the stepper motors
  • 2.75″ (70 mm) x 13.0″ (330 mm) table with two T-slots
  • Pulleys, drive belt, three hexagonal keys, spindle bars, gib removal tool, eight-foot three-wire power cord, and instruction manual
  • Headstock spacer block
  • ¼” Drill Chuck w/ key, #1 Morse arbor with drawbolt

A-Package Accessories include:

  • Step block hold-down set
  • 5/32″ Sherline hex T-driver
  • 3-piece center drill set
  • Fly cutter w/carbide bit
  • 3-piece mill collet set w/drawbolt
  • 6-piece 3/8″ 2-flute double-ended end mill set
    (P/N 7401 4-flute set may be substituted depending on availability)
  • 3/8″ end mill holder
  • Milling vise
  • Sherline Accessories Shop Guide

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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 Assembly and Instruction Guide

Instructions PDF Download

Download PDF Sherline Vertical Milling Machine CNC Instructions

Instructions PDF Download

Download PDF 12″ Mill Base Dimensions

Instructions PDF Download

Download PDF 5000/5400 Mill Column Base Dimensions

Instructions PDF Download

Download PDF Mill Saddle Lubrication instructions

Instructions PDF Download

Max clearance
(table to spindle)
8.00″ (203 mm)
Throat
(no spacer)
2.25″ (50 mm)
Throat
(w/ headstock spacer)
Included, 3.50″ (89 mm)
Travel, “X” Axis 8.65″ (220 mm) (9″ (228 mm) w/stop screw removed)
Travel, “Y” Axis 5.00″ (127 mm)
Travel, “Z” Axis 6.25″ (159 mm)
Hole through spindle .405″ (10 mm)
Spindle nose thread 3/4″-16 T.P.I.
Spindle nose taper #1 Morse
Spindle runout of Morse taper .0005″ or less
Handwheel graduations .001″ (.01 mm)
Width Overall* 15.00″ (381 mm)
Depth Overall* Base footprint: 17.625″ (448 mm); With fully extended brass leadscrew cover: 20.5″ (520 mm)
Height Overall (Max.)* 20.75″ (527 mm)
Table size 2.75″ x 13.00″ (70 x 330 mm)
Hold-down provision 2 T-Slots
Shipping Weight 40 lb. (18.2 kg)
Movements in addition
to X-, Y- and Z-axes
Headstock rotation (90° left/right)
Motor 90 volt DC with electronic speed control that accepts any incoming current from 100VAC to 240 VAC, 50 Hz or 60 Hz.
Click here for motor specifications
Spindle Speed Range 70-2800 RPM continuously variable by electronic speed control
CNC Stepper motor holding torque 136 oz-in
Maximum CNC travel positioning speed, X, Y and Z axes 22 inches/min**

*Overall dimensions include motor and speed control
**NOTE: To avoid missed steps, rapid travel speeds should be used for positioning only. Actual feed rates when cutting metal will usually be the range of 6 inches/min or slower.

Click on the link for the exploded view of the 8540/8541 CNC Deluxe Mill to help identify replacement parts.

If you are still uncertain please call our customer service representatives for help with this item.

Click the P/Ns below to download a zipped version of the IGS 3D CAD file. You will need to extract the zip file before viewing the files.
8540 CNC 3D IGS model
You need an IGS viewer to open .igs files. CLICK HERE to download a FREE IGS viewer.

5000 (5100) Mill 5400 (5410) Mill 5800 NexGen Mill
5000 (5100) 5400 (5410) 2000 (2010) 5800 (5810)
Max. clearance
(table to spindle)
8.00″ (203 mm) 8.00″ (203 mm) 9.00″ (229 mm) 14.00″ (356 mm)
Throat (no spacer) 2.25″ (50 mm) 2.25″ (50 mm) Adjustable Adjustable
Throat (w/ headstock spacer) Optional 3.50″ (90 mm) Adjustable Adjustable
Travel: X-axis (with stop) 8.65″ (220 mm) 8.65″ (220 mm) 8.65″ (220 mm) 13.65″ (347 mm)
Travel: Y-axis 3.00″ (76 mm) 5.00″ (127 mm) 7.00″ (178 mm) 11.00″ (279 mm)
Travel: Z-axis 6.25″ (159 mm) 6.25″ (159 mm) 5.38″ (137 mm) 9.38″ (238 mm)
Hole through spindle .405″ (10 mm) .405″ (10 mm) .405″ (10 mm) .405″ (10 mm)
Spindle nose thread 3/4-16 T.P.I. 3/4-16 T.P.I. 3/4-16 T.P.I. 3/4-16 T.P.I.
Spindle nose taper #1 Morse #1 Morse #1 Morse #1 Morse
Spindle runout of Morse taper .0005″ or less .0005″ or less .0005″ or less .0005″ or less
Handwheel graduations .001″ (.01 mm) .001″ (.01 mm) .001″ (.01 mm) .001″ (.01 mm)
Handwheel Type Standard Handwheels Zero Adjustable Handwheels (With the exception of DRO machines which come with DRO handwheels) Zero Adjustable Handwheels (With the exception of DRO machines which come with DRO handwheels) Zero Adjustable Handwheels (With the exception of DRO machines which come with DRO handwheels)
Electronically controlled
spindle speed range
70 to 2800 RPM 70 to 2800 RPM 70 to 2800 RPM 70 to 2800 RPM
Width overall 14.75″ (375 mm 15.00″ (381 mm) 15.00″ (381 mm) 20.00 (508 mm)
Depth overall 11.75″ (298 mm) 14.00″ (356 mm) 22.25″ (565 mm) 23.13″ (588 mm)
Height overall (Max.) 20.75″ (527 mm) 20.75″ (527 mm) 23.38″ (568 mm) 24.50″ (622 mm)
Table size 2.75″ x 13.00″
(70 mm x 330 mm)
2.75″ x 13.00″
(70 mm x 330 mm)
2.75″ x 13.00″
(70 mm x 330 mm)
2.75″ x 18.00″
(70 x 457 mm)
Hold-down provision 2 T-slots 2 T-slots 2 T-slots 3 T-slots
Shipping weight 33 lb (15.0 kg) 36 lb (16.3 kg) 38 lb (17.2 kg) 50 lb. (22.7 kg)
Movements in addition
to X-, Y- and Z-axes
Headstock rotation
(90° L/R)
Headstock rotation
(90° L/R)
Headstock rotation
(90° L/R)
Headstock rotation
(90° L/R)
Column rotation N/A N/A (90° L/R) N/A
Column pivot N/A N/A (90° Fwd/Bk) (90° Fwd/Bk)
Column swing N/A N/A (90°L/R) (90°L/R)
Column travel N/A N/A (In/Out) 5.5″ (140 mm) (In/Out) 5.5″ (140 mm)
Motor Specs
Input voltage 100 to 240 VAC, 50 or 60 Hz
Output to motor 90 VDC
Current draw .5 to 15 amps depending on load
No-load output shaft speed 6000 RPM (no pulley)
Click here for more detailed specs
Spindle Specs
Spindle End play (factory
adjustment of preload)
.0002″ (.005 mm) or less, normal pulleys
Runout at nose .0005″ (0.013 mm) or less
Bearings Two 20 mm lifetime lubricated ball bearings with adjustable preload
If you are working with brass or wood, we suggest you use the toggle switch dust cover to protect the life of your motor & speed control.

The MASSO G3 CNC controller, power supply, stepper motors, cable system and optical encoder are sold as a part of our Accu-Pro line of machines and are not available for purchase separately or as an upgrade option to existing machines.