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Back to Masso CNC Controller Accessories
Limit Switch Assembly
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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Always wear safety glasses when operating machine tools. |
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Download PDF Mill Limit Switch Mounting
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Download PDF Lathe Limit Switch Mounting Retrofit Instructions
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Download PDF Way Cover Modification for Standard Leadscrew Mills with Limit Switches
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Download PDF Sherline/MASSO Controller Part Information and Part Numbers
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Leadscrew Mills
| P/N 8796 X-axis limit switch kit-leadscrew mill | ||
|---|---|---|
| Part No. | Description | Quantity |
| 68040 | Limit switch w/pigtail | 1 |
| 68022 | X-axis Limit Switch Mount | 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 |
| 68049 | #2 Phillip x 5/8″ flat-head sheet metal screws | 2 |
| 67115 | 5-40 x 7/8″ SHCS | 2 |
| 68039 | Eccentric trigger | 1 |
| 68044 | Nylon spacer | 1 |
| 40340 | 10-32 x 1″ SHC screw | 1 |
| 87841 | 1/8″ x 1-1/2″ steel transfer punch for mill Y-axis limit switch (Retrofit) | 1 |
| P/N 8798 Z-axis limit switch kit-leadscrew mill (5400 Mills) | ||
|---|---|---|
| Part No. | Description | Quantity |
| 68040 | Limit switch w/pigtail | 1 |
| 68022 | 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 8777 Z-axis limit switch kit-leadscrew mill (2000 & 5800 Mills) | ||
|---|---|---|
| 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 8789 XY-axis limit switch kit-leadscrew mill (All Leadscrew Mills) | ||
|---|---|---|
| Part No. | Description | Quantity |
| 8796 | X-Axis Limit Switch Assembly | 1 |
| 8797 | Y-Axis Limit Switch Assembly | 1 |
| P/N 8772 XYZ-axis limit switch kit-leadscrew mill (5400 Mills) | ||
|---|---|---|
| Part No. | Description | Quantity |
| 8796 | X-Axis Limit Switch Assembly | 1 |
| 8797 | Y-Axis Limit Switch Assembly | 1 |
| 8798 | Z-Axis Limit Switch Assembly (5400 Mills) | 1 |
| P/N 8799 XYZ-axis limit switch kit-leadscrew mill (2000 & 5800 Mills) | ||
|---|---|---|
| Part No. | Description | Quantity |
| 8796 | X-Axis Limit Switch Assembly | 1 |
| 8797 | Y-Axis Limit Switch Assembly | 1 |
| 8777 | Z-Axis Limit Switch Assembly | 1 |
| P/N 8794 XYZ & A-axis limit switch kit-leadscrew mill (5400 Mills) | ||
|---|---|---|
| Part No. | Description | Quantity |
| 8796 | X-Axis Limit Switch Assembly | 1 |
| 8797 | Y-Axis Limit Switch Assembly | 1 |
| 8798 | Z-Axis Limit Switch Assembly (5400 Mills) | 1 |
| 8740 | A-Axis Limit Switch kit | 1 |
| P/N 8779 XYZ & A-axis limit switch kit-leadscrew mill (2000 & 5800 Mills) | ||
|---|---|---|
| Part No. | Description | Quantity |
| 8796 | X-Axis Limit Switch Assembly | 1 |
| 8797 | Y-Axis Limit Switch Assembly | 1 |
| 8777 | Z-Axis Limit Switch Assembly | 1 |
| 8740 | A-Axis Limit Switch kit | 1 |
Ball Screw Mills
| 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 |
| 68035 | 10-32 x 7/16″ Phillips flat-head screw | 1 |
| 32100 | 10-32 Hex nut | 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 |
| 68049 | #2 Phillip x 5/8″ flat-head sheet metal screws | 2 |
| 67115 | 5-40 x 7/8″ SHCS | 2 |
| 68039 | Eccentric trigger | 1 |
| 68044 | Nylon spacer | 1 |
| 40340 | 10-32 x 1″ SHC screw | 1 |
| 87841 | 1/8″ x 1-1/2″ steel transfer punch for mill Y-axis limit switch (Retrofit) | 1 |
| P/N 8777 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 8788 XY-axis limit switch kit-ball screw mill | ||
|---|---|---|
| Part No. | Description | Quantity |
| 8782 | X-Axis Limit Switch Assembly | 1 |
| 8783 | Y-Axis Limit Switch Assembly | 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 |
| 8777 | Z-Axis Limit Switch Assembly-Ball Screw Mill | 1 |
| P/N 8793 XYZ & A-axis limit switch kit-ball screw mill | ||
|---|---|---|
| Part No. | Description | Quantity |
| 8782 | X-Axis Limit Switch Assembly | 1 |
| 8783 | Y-Axis Limit Switch Assembly | 1 |
| 8777 | Z-Axis Limit Switch Assembly | 1 |
| 8740 | A-Axis Limit Switch Assembly | 1 |
Chucker Lathe
| 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 |
| 68035 | 10-32 x 7/16″ Phillips flat-head screw | 1 |
| 32100 | 10-32 Hex nut | 1 |
| 40530 | 5-40 x 3/8″ SHC screws | 2 |
| P/N 8783 Z-axis limit switch kit-chucker lathe | ||
|---|---|---|
| Part No. | Description | Quantity | 68040 | Limit switch w/pigtail | 1 |
| 68024 | Y-axis limit switch mount | 1 |
| 68046 | Limit switch mounting tab | 1 |
| 68049 | #2 Phillip x 5/8″ flat-head sheet metal screws | 2 |
| 67115 | 5-40 x 7/8″ SHCS | 2 |
| 68039 | Eccentric trigger | 1 |
| 68044 | Nylon spacer | 1 |
| 40340 | 10-32 x 1″ SHC screw | 1 |
| 87841 | 1/8″ x 1-1/2″ steel transfer punch for mill Y-axis limit switch (Retrofit) | 1 |
| 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 |
Leadscrew Lathes
| P/N 8773 X-axis limit switch kit-leadscrew lathe | ||
|---|---|---|
| Part No. | Description | Quantity |
| 68040 | Limit switch w/pigtail | 1 |
| 68042 | Eccentric trigger | 1 |
| 12050 | 8-32 c 3/8″ SHCS | 1 |
| 68048 | #2 Phillips x 1/2″ flat-head sheet metal screws | 2 |
| 68046 | Limit switch mounting tab | 1 |
| 68031 | X-axis limit switch mount | 1 |
| P/N 8774 Z-axis limit switch kit-leadscrew lathe | ||
|---|---|---|
| Part No. | Description | Quantity |
| 68040 | Limit switch w/pigtail | 1 |
| 68042 | Eccentric trigger | 1 |
| 12050 | 8-32 c 3/8″ SHCS | 1 |
| 68048 | #2 Phillips x 1/2″ flat-head sheet metal screws | 2 |
| 68046 | Limit switch mounting tab | 1 |
| 68020 | Z-axis limit switch mount | 1 |
| P/N 8778 XZ-axis limit switch kit-leadscrew lathe | ||
|---|---|---|
| Part No. | Description | Quantity |
| 8773 | X-Axis Limit Switch Assembly-Leadscrew Lathe | 1 |
| 8774 | Z-Axis Limit Switch Assembly-Leadscrew Lathe | 1 |
Ball Screw Lathes
| P/N 8791 X-axis limit switch kit-ball screw lathe | ||
|---|---|---|
| Part No. | Description | Quantity |
| 68040 | Limit switch w/pigtail | 1 |
| 81270 | 2-56 x 3/8″ Phillips head machine screws | 2 |
| 40530 | 5-40 x 3/8″ SHCS | 2 |
| 68041 | Eccentric trigger | 1 |
| 42050 | 8-32 x 3/8″ SHCS | 1 |
| 40660 | #10 washer | 1 |
| 68028 | X-axis limit switch mount | 1 |
| P/N 8792 Z-axis limit switch kit-ball screw lathe | ||
|---|---|---|
| Part No. | Description | Quantity |
| 68040 | Limit switch w/pigtail | 1 |
| 68048 | #2 Phillips x 1/2″ flat-head sheet metal screws | 2 |
| 68042 | Eccentric trigger | 1 |
| 12050 | 8-32 x 3/8″ SHCS | 1 |
| 68046 | Limit switch mounting tab | 1 |
| 68030 | Z-axis limit switch mount | 1 |
| 40530 | 5-40 x 3/8″ SHCS | 2 |
| 46213 | Limit switch mount spacer | 1 |
| 20970 | 8-32 x 1/2″ SHCS | 2 |
| P/N 8795 XZ-axis limit switch kit-ball screw lathe | ||
|---|---|---|
| Part No. | Description | Quantity |
| 8791 | X-Axis Limit Switch Assembly-Ball Screw Lathe | 1 |
| 8792 | Z-Axis Limit Switch Assembly-Ball Screw Lathe | 1 |
Rotary Table
| 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 |
Installing Limit Switches on a Ball Screw Mill
Rotary Table Limit Switch Install
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