Limit Switch Assembly

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Includes:

  • Limit switch (with pigtail and connector)
  • Limit switch mounting hardware

About the limit switches, optical encoder speed control cables, and mounts

The controller board that we have made for us by MASSO is designed specifically for our machines. The software and the wiring configurations are proprietary to Sherline Products.

You can purchase any of the limit switches, or optical encoder, and their associated cables and mounts from Sherline. However, these components and cable connections are not compatible with any stock MASSO board that you buy directly from MASSO.

This is especially true regarding the optical encoder and our speed control. Our speed control is an older analog system that is being controlled through software that was created specifically for our system. If you were to connect our optical encoder to your stock MASSO board, you may get an accurate RPM readout, but you would not be able to control the RPM of the spindle motor with G-code.

That being said, you can purchase the limit switches with their pigtail and connector. You can also purchase our limit switch mounts and eccentric triggers to be mounted on your Sherline machine. You may then connect them to any controller that is configured to work with our limit switches.

There will be one or two holes that need to be drilled and tapped on your machine in order to retrofit some of our limit switch mounts.

NOTE: Click on the Instructions tab above for mounting hole information and how to modify your accordion way cover (leadscrew mills only).

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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 Limit Switch Mounting
Retrofit Instructions

Instructions PDF Download

Download PDF Way Cover Modification for Standard Leadscrew Mills with Limit Switches

Instructions PDF Download

P/N 8740 A-axis limit switch kit-rotary table
Part No. Description Quantity
68040 Limit switch w/pigtail 1
68048 #2 Phillips x 1/2″ flat-head sheet metal screws 2
87087 8-32 x 1/4″ set screw, flat bottom 1
87088 6-32 x 3/8″ Pan head screw 1
87094 A-axis limit switch mount 1
87095 A-axis trigger 1
P/N 8782 X-axis limit switch kit-ball screw mill
Part No. Description Quantity
68040 Limit switch w/pigtail 1
68026 X-axis limit switch mount 1
81270 2-56 x 3/8″ Phillips head machine screws 2
40510 10-32 x 3/8″ SHC screw 1
40530 5-40 x 3/8″ SHC screws 2
P/N 8783 Y-axis limit switch kit-ball screw mill
Part No. Description Quantity
68040 Limit switch w/pigtail 1
68024 Y-axis limit switch mount 1
68046 Limit switch mounting tab 1
68048 #2 Phillip flat-head sheet metal screws 2
67115 5-40 x 7/8″ SHC screws 2
68039 Eccentric trigger 1
68044 Nylon spacer 1
40340 10-32 x 1″ SHC screw 1
P/N 8784 Z-axis limit switch kit-ball screw mill
Part No. Description Quantity
68040 Limit switch w/pigtail 1
68020 Z-axis limit switch mount 1
68046 Limit switch mounting tab 1
68048 #2 Phillip flat-head sheet metal screws 2
12050 8-32 x 3/8″ SHC screw 1
68042 Eccentric trigger 1
P/N 8785 XYZ-axis limit switch kit-ball screw mill
Part No. Description Quantity
8782 X-Axis Limit Switch Assembly-Ball Screw Mill 1
8783 Y-Axis Limit Switch Assembly-Ball Screw Mill 1
8784 Z-Axis Limit Switch Assembly-Ball Screw Mill 1
P/N 8786 X-axis limit switch kit-chucker lathe
Part No. Description Quantity
68040 Limit switch w/pigtail 1
68026 X-axis limit switch mount 1
81270 2-56 x 3/8″ Phillips head machine screws 2
40510 10-32 x 3/8″ SHC screw 1
40530 5-40 x 3/8″ SHC screws 2
P/N 8790 XZ-axis limit switch kit-chucker lathe
Part No. Description Quantity
8786 X-Axis Limit Switch Assembly-Chucker Lathe 1
8783 Z-Axis Limit Switch Assembly-Chucker Lathe (same as Y-axis Assembly-Ball Screw Mill) 1
P/N 8796 X-axis limit switch kit-leadscrew mill
Part No. Description Quantity
68022 X-axis Limit Switch Mount 1
68040 Limit switch w/pigtail 1
68046 Limit switch mounting tab 1
68048 #2 Phillips x 1/2″ flat-head sheet metal screws 2
12050 8-32 x 3/8″ SHCS (This is for the limit switch stop) 1
P/N 8797 Y-axis limit switch kit-leadscrew mill
Part No. Description Quantity
68040 Limit switch w/pigtail 1
68024 Y-axis limit switch mount 1
68046 Limit switch mounting tab 1
68048 #2 Phillip flat-head sheet metal screws 2
87813 8-32 x 7/8″ SHC screws 2
68039 Eccentric trigger 1
68044 Nylon spacer 1
40340 10-32 x 1″ SHC screw 1
P/N 8798 Z-axis limit switch kit-leadscrew mill
Part No. Description Quantity
68040 Limit switch w/pigtail 1
68020 Z-axis limit switch mount 1
68046 Limit switch mounting tab 1
68048 #2 Phillip flat-head sheet metal screws 2
12050 8-32 x 3/8″ SHC screw 1
68042 Eccentric trigger 1
P/N 8799 XYZ-axis limit switch kit-leadscrew mill
Part No. Description Quantity
8796 X-Axis Limit Switch Assembly 1
8797 Y-Axis Limit Switch Assembly 1
8798 Z-Axis Limit Switch Assembly 1

Installing Limit Switches on a Ball Screw Mill

Rotary Table Limit Switch Install

Shipping

We do not charge a flat rate for shipping because of the variations in weight for our products. Instead we charge you what the shipping company charges us. Our website uses a shipping calculator based on the daily rates for USPS and UPS based on the weight and destination of the shipment. You can also have us use your UPS/FedEx account number to charge your shipping to. Just enter it in the appropriate box on the checkout page.

Domestic orders are shipped Monday – Friday. Expedited orders must be placed by 11 am PST to ship the same day.

Orders shipping ground have a processing time of 2-3 working days for domestic orders and 4-5 working days for international orders. Click here for more information on our shipping and order policies.

Returns

Most merchandise can be returned within 30 day of the purchase date. A refund will be issued to the original form of payment at the original selling price. View our complete return policy and/or start your return online here.