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Products > DROs > DRO Packages     All DRO Pros products

Digital Position Readout, 3-Axis Magnetic Scale, DRO Pros Mill

Digital Position Readout, 3-Axis Magnetic Scale, DRO Pros Mill
Part Number: 4239
Weight: 40.0 lb

Price: $1,215.00

In stock
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  • Magnetic scales can be cut to exact length you need
  • Easy to use. More buttons, most intuitive layout--just walk up and operate
  • 5 micron (0.0002") resolution
  • Clearly-written full-color manual and 6-year warranty


The DRO PROS EL400 three-axis mill package includes everything you need: the display head, 3 magnetic scales 12" x 30" x16" maximum travel, detailed installation instructions, a detailed full-color operator’s manual, 6-year warranty, mounting arm, mounting hardware, and universal mounting brackets. Additionally, the display has a USB port on the back, ensuring it won't become obsolete when a new software update is released.

Magnetic scales are impervious to liquid yet they are slimmer than glass scales. They’re easier to mount and more durable than other scales. Simply cut the scales to the length you need and mount them. See the instructions on the Chris’ Tips tab.

This digital readout kit includes the following features: half function, inch/metric conversion, absolute/incremental modes, axis home reference, machine reference, sub datums, bolt-hole circle (pcd), arc bolt hole, arc contouring, grid hole function, line hole function, calculator (trigonometric), encoder fail detection, memory backup.

Operates on 120V or 240V AC

Chris' Tips

Chris Chris' Tips
One of the major advantages of magnetic scales is the ability to cut them to exactly the length you need. Here are instructions on how to cut magnetic scales.


Half Function

Inch/metric conversion

Absolute/incremental modes

Axis home reference

Machine Reference

Sub Datums

Bolt-hole circle (PCD)

Arc Bolt Hole

Arc Contouring

Grid Hole function

Line Hole function

Calculator (Trigonometric)

Encoder fail detection

Memory backup


Repeatability 10 μm, 0.010 mm, 0.0004"
Resolution 5 μm, 0.005 mm, 0.0002"
Specified Accuracy 10 μm, 0.010 mm, 0.0004" / 1 m travel
Accuracy / Foot 0.0002" (0.005 mm)
Accuracy / 100 mm 0.0001" (0.002 mm)
Scales Cut to Length by User Yes
Scale Technology Magnetic
Scale Protection Coolant & dust proof
Voltage 120-240 V
Clear to Zero Yes
Direct Entry of Position Yes
Inch/mm Display Yes
Power Off Memory Yes
Reversible Count Direction Yes
Find Center Yes
Bolt Circles Yes
Bolt Lines Yes
Preset Points Yes
Tool Offsets No
Radius/Diameter Yes
Incremental/Absolute Yes
Calculator Yes
Arc machining Yes
Linear Error Compensation Yes
Made in India
Warranty 6 years
Phone Tech Support Free


3-Axis display

Magnetic Scales


This item ships directly from our supplier in California to you. It might be a day or two longer before it ships, and you will receive it in a separate package from other items on your order. You might receive this item a few days before or a few days after you receive items shipped from our warehouse.


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