Patented, integrated auto feed

Pentruder has a patent for its integrated automatic feed for core drills. “Not having a separate feed unit for the drill motor is a great feature. It’s more convenient for the operator and it also enables direct communication from the main motor to the auto feed software so that the auto feed can react extremely fast. We are talking about nano seconds. This direct communication is a must if you want auto feed for a core drill to work as well as possible and be more similar to a wall saw in how it interprets the information and controls the reaction, all in order to reach highest possible efficiency without ‘glazing’ the drill bits. The goal has been to make the auto feed ‘hands off’, and we believe we’ve succeeded,” says Kristoffer Johnsen, who runs the technical side of the company. The MDU3 will also be available without auto feed. 

Three capable models

The MDU3 is built on a new concept with drop gears, creating three different MDU3 models. Each model is in itself very capable with the same high power and a wide range of speeds. The concept with changing drop gears is new and unconventional, and inspired by the Tractive motorsport transmissions, the other product range of Tractive AB. “It is like three in one machine. A small concrete cutting company with one or just a couple of operators can get the MDU3 model which will suit the majority of their projects and change drop gears to make their machine suit other sizes of drill bits if needed. No need to invest in another machine or turn a job down because their equipment cannot handle the challenge,” explains Tractive’s Marie Peil. “The MDU3 might at first sound like a machine for the special jobs given its high power, but we would say that it isn’t. It is a machine which is developed to be really efficient for the everyday type of jobs, but when there are surprises at the job site, as we all know there will be, the operator can trust that the MDU3 will deliver,” says Kristoffer. 

Wall saw technology – ‘totally over engineered’

To make the MDU3 really durable, the technology and principles of the Pentruder RS2 wall saw have been taken into a core drill. The light weight torque motor is said to  have high levels of efficiency and power output. An electronically monitored slip clutch provides durability, and the electronics build is stated to be of the highest quality possible and well proven. “It is totally over engineered, but it’s worth it,” says Kristoffer.

Features for ease of operation

The MDU3 features a quick change coupling for the drill bit which customers of the MDU NTGRA are said to know and appreciate for durability and practicality. The easy to use Pentruder app makes it possible for the operator to monitor spindle speed, load, update the machine with new firmware on the jobsite and much more.

Testing complete

During the winter, the Pentruder MDU3 core drill has been put to test in several markets with great results. The test pilots in different countries are said to especially like the high power, wide speed range and versatility of the MDU3. “It’s still impresses me with its power all through the register from low speed to high speed and it’s maintaining the power even under heavy load,” said the Swedish concrete cutting contractor Andreas Trönnberg on his Facebook page. Kjell Dackeberg from Akutt in Norway states: “The drop gear feature to change speed range, i.e. changing model, is so easy. I just put the drill motor upside down on the drill rig, wiped it off so it’s clean, and took off the lid to change the drop gears.”

Having finished the test phase, the MDU3 will be released to the market in March 2025, beginning in some parts of Europe.

www.pentruder.com