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Diamond Products 4240044 M-4 Multi-Purpose Combo Core Rig with Weka 14 Amp DK13 Motor (970/2330/4400 RPM) and Vacuum Pump

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Diamond Products Offers the Best in Coring Equipment

SKU: 4240044

Availability: In stock


Diamond Equipment
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For more info about our products. Call us at (866) 462-3581

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No Payment Until 2018



  • Reversible slide handle for use on left of right side
  • High strength, hard anodized 1-5/8" X 2" aluminum column
  • Top carrying handle
  • Quick release motor mount
  • Carriage lock
  • 4 leveling screws on base
  • Lightweight and portable
  • Combo bases have angle braces for drilling up to 45 degrees
  • 4 adjustable slide bearings provide superior carriage regidity

More Info


The 4 Elements of Effective Drilling/Coring: WASP


As the diamonds work on grinding away the concrete, water helps form a concrete "soup" called slurry that acutally helps the grinding process by keeping the diamond exposed. If there is not enough water, there isn't anything to create the slutty and the diamonds will continue to grind the same particles. If there is too much water, all of the concrete dust particles will wash away with nothing to help keep the diamonds exposed. Slurry should look like heavily creamed coffee.


Proper anchoring is essential to insure a straight core. The best method of anchoring is using physical anchors rated for core drilling. Using a base vacuum is fine as long as the surface is smooth and the vacuum gasket is in good shape. Never vacuum a  rig to a wall due to unreliable job site power. Never stand on a rig to hold it down. Standing on a rig causes a "ribbing" effect on the core and will eventually cause the bit to bind up in the hole.


Setting your motor at the correct R.P.M. could mean the difference between grinding properly and glazing the diamond segments. Every core bit should be run at the proper R.P.M. The smaller the bit, the faster the R.P.M. should be set.


In order to maintain the correct R.P.M., you need the power to do the job. The majority of core drills are electric powered. It is best to use an amp meter when electric drilling to monitor the gauge and ensure you do not cause a loss of productivity. Keeping the motor bogged-down amd the gauge in the red can wear the internal components of you electric dill motor. Also, insufficient power can rob the core bit of R.P.M. and the ability of the diamonds from being exposed. This can also be said when drilling with a hydraulic motor



  • Combination rigs include drill motor and switch
  • vacuum pump and combination angle stand..All M-4 combination rig motors come with slip clutch safety override.


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