Can I also cut straight?Equipment-01
Of course you can also cut straight off. You can cut completely flat but a cut only half a mm is to prefer as you then get the position of the segment for the brazing and also considerably strengthen the whole bit.

What is the difference between the CD 7-28 and the CD 600?
The CD 7-28 is more stable, built for daily, professional use. With the extensions you can cut bits up any length and a diameter up to 1000 mm (40”). The CD 600 has the same cutter head but a limited capacity to 600 mm (24”) in diameter and 1600 mm (64”), with extension, in height.

Do you need to be very strong to cut with the manual handle?
Absolutely not - the cutting can be performed by any person, male or female, young or old.

What wall thickness on the steel can the CD 7-28 or CD-600 cut?
The knife cuts through without any problems all common steel for bits up to a thickness of 3.5 mm.

What is the life of the knife?
Normally the knife can cut several thousand cuts before sharpening. It can then be sharpened at least once.

What is the life of the matrix?
Normally it lasts minimum 10.000 cuts provided there has not been any excessive force on it.

If I bury the segments into the steel - will they not stop cutting before they are finished?
Also when you have segments with diamond content all the way to the end they will not stop cutting even though they are immersed. The reason for this is that the steel is always so soft that it doesn´t prevent the diamonds
from cutting. In fact they drill even faster because of that the steel and the segments are so much thinner than in the beginning. To ensure that the water flows make a cut 10 mm (½”) deep with an angle grinder cutting wheel between each segment.

My my drill bits have a different thread than the standard thread on your equipment.
You can still use our equipment without any problems. All you need is an adapter which we can supply to you.
Brazing-core-bit-01Isn´it difficult to braze? What do I need to start retipping myself?
If you have no experience on how to braze you will learn quick - we will provide you with all the information you may need and what equipment to choose. Practice on a bit or two and you will soon get the grip.

What do I need to start?
When you order your retipping equipment from us, to decide what knife and matrix to choose, inform us what segment length you use for your retipping. 24 mm length is the most common in Europe. (1” for USA.)
For the brazing we recommend acetylen/ oxygen gas and a torch head with a concentrated flame. (More information comes with your first magnet shipment.) This you buy at you local supplier.To start brazing with magnets a good quantity may be 12 pcs of magnet JM A-type. Then you normally can braze core bits up to Ø 150 mm (6”) in one set. Silver for the brazing and flux specially suited for these kind of jobs you can order from us.

How many segments shall I put on?
Along with the equipment comes a chart showing recommended number of segments for each diameter. You are free to change according to your wishes. If you are drilling in very hard materials - or if you want to drill faster - or if you have a weak machine - you put on less segments.

What segment width shall I choose?
First depending on the steel thickness - you need a clearance on both sides of at least 0.5 mm (.02”) on the smallest bits. On the outside of the bit you may have a little more clearance than on the inside. The more
power on the machine or the more abrasive material the bigger clearance is to prefer.

What is the life on the magnets?
The magnets can be used several thousand times.

What is the difference between the JM Magnets and the Super-Strong-Flux Magnets?
Super-Strong-Flux-Magnets are stronger and have a longer life time. Each magnet has four different clearances and cover all core bit diameters. The JM Magnets are in two different types. Magnet A covers most of the core
bit diameters and is our most sold magnet type.

Can I also buy only the steel barrels and that way manufacture my own new bits?
Yes, of course you can manufacture new bits on your own by purchasing only the barrels.
Core-drilling-pDo I need different segments for different materials?
Normally you need special segments - especially in granite. Granite can be difficult but if you use our equipment and implant a reduced number of segments (25% less) you will get a drill bit that drills fast and easy in most granite materials.

Must I use water when drilling in concrete or stone?
Normally yes, these materials are very hard, you need powerful machines and much heat is generated during the drilling. Insufficient cooling water will make the drilling more difficult and lead to a broken core bit. However,
if you use our equipment and
1. Reduce the number of segment (will increase cutting speed)
2. Put the segments deeper into the steel, you will achieve a drill bit that can work temporary in soft concrete (with no reinforcement)
- provided that you have an effective dust suction unit connected to the machine and also check often that the bit doesn't get overheated.

My machine is designed for hand held drilling. Do I need special bits when drilling hand held in concrete?
Drilling in concrete is very difficult and drilling in reinforced concrete is not recommended ( because of the high danger if the drill gets stuck and that the machine will be thrown out of your hands). You need a pressure of
approximately 0.5 kg per mm Ø (20 kg for a Ø40 mm bit) and larger holes are therefore very difficult to drill. However if you with the Diatip equipment manufacture a bit with a reduced number of segments you can that way increase the penetration speed and facilitate the drilling.

The hole I need to drill is deeper than the length of my core bit. What can I do?
Then use an extension rod. After drilling as far as you can, remove the core by breaking it, attach the extension piece between the motor and the bit, and then carry on drilling.