Frequently Asked Questions
We have been Marketing the DHC 2000 for around 14 Years and have listed below some of the most commonly asked questions |
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| Question | If this is so good why haven't I seen it before ? Why isn't it sold in every welding shop? | |
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The DHC 2000 has mainly been sold at large Trade Shows where it can be seen working, as most people just simply will not believe that it will do the things we say it can do and below is a typical example of this from a School Metals Instructor (full letter available upon request) "When I was first approached about the Dillon Mark 111 (now called DHC 2000) I had my doubts. I listened and read the brochure. It reminded me of the diamond rings a person can buy on TV for a good price the only catch is they forget to tell the customer that they are 1/164 of a carat and industrial diamonds. When the demonstration was set up I felt better but I was still skeptical, especially when all materials were brought along. What are they trick materials? For you see in theory the Dillon shouldn't work, it sounds to good to be true. When you had me weld with your welder during the demonstration I couldn't believe what happened, it worked. I was really impressed when you offered the Dillon for my use and the Students use for 1 week. This was a fine opportunity to test it on many different materials and conditions. It is outstanding for welding Aluminium. Now just about anyone can weld Aluminium without experience. My students and I really put the test to the Dillon Mark 111. It withstood our use. The Cutting torch has to be one of the greatest inventions to come along to the welding industry. It is more like using a saw instead of a welder due to the smoothness of cut and fine line" So just sitting on a shelf in a retail shop does not work (unless the staff are keen enough to demonstrate it, which in our experience happens very seldom). It is also worth mentioning that during the 14 Years we have been involved with the DHC 2000, we have found that most of the welding shops are in the business of selling expensive MIG/ TIG or Standard Oxy/Acetylene Torches that consume large amounts of Gas and Parts and as gas usage with the DHC 2000 is approx. halved and the tips last for many years they do not enjoy anything like the return business, so it makes sense for them to sell you the conventional welding gear and not be interested in stocking the DHC 2000 . Our web site had now totally changed this, as potential customers can now see our video demo's on the net and actually see the torch in action, then Purchase direct from us, eliminating the additional markup of the traditional Middle Man. |
| Question | What is the difference between the DHC 2000 and a conventional Oxy/Acetylene Torch? | |
| Answer | The conventional Oxy/Acetylene Torch has a wide heat spread, this is because it mixes gases externally from the tip. By centrifugal force atmospheric oxygen is also sucked into the weld area due to this whirlpool action. This action combined with high gas pressures create a set of conditions which make welding very difficult, particularly on thin materials and easily leads to distortion and collapse of the job. The DHC 2000 has quite the opposite, a precision mixing chamber inside the hand piece and an extremely narrow concentrated heat affected zone, for example if you held it just above an Aluminium drink can and turned the flame onto full setting you would blow a small hole in it, do that with a conventional oxy torch and you would melt the can away, do it with a MIG and you would blow it to bits and only the most skilled operators could do the same thing with a TIG. Combined with equal low pressure and the oxygen free environment in the weld area, welding conditions similar to the operation of an expensive 3 phase TIG have been created with the DHC 2000 . (See diagrams) | |
| Question | What is the thickest it can weld up to? | |
| Answer | Although the DHC 2000 will weld most metals (ferrous or non ferrous) for the sake of brevity we will list the most commonly used ones. Please contact us if you need info. on thickness of other materials. In Mild Steel up to half inch (12.5mm) In Stainless Steel full penetration welds 3 to 4mm In Aluminium & Cast Aluminium there is no limit on thickness as long as you are able to maintain correct preheat (approx. 300 deg. C) all over the item to be welded, especially on a big mass such as an engine head. As becomes apparent if the item is too big it would not be practical to attempt preheat, so if you are constantly welding large items (bigger than an engine head) we would suggest that you look at other forms of welding. If it is only a one off job the torch would handle it but it would just take longer. In Cast Iron up to 1 inch (25 mm) |
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| Question | Do I need to use special filler rods? | |
| Answer | No. The DHC 2000 uses standard inexpensive TIG filler rods available at most welding outlets, or you can use a slither of the material being welded if feasible. | |
| Question | Does the DHC 2000 work on LPG/Oxy (Propane/Oxy)? | |
| Answer | Yes, but mainly for brazing and cutting, just use the standard tips with the kit. Some of our customers use it for welding all sorts of materials including Aluminium (but not Stainless Steel) but all the strength tests etc., were done with Oxy/Acetylene. | |
| Question | Does the DHC 2000 work on standard Oxy/Acet Regulators? | |
| Answer | Yes, as long as they are in good working order and have no leakage from the diaphragms works with both standard and two stage regulators. | |
| Question | Will the DHC 2000 fit onto my standard hoses? | |
| Answer | Yes, our Special Export Kit is supplied with fittings to screw straight into your hoses and straight onto the Torch. | |
| Question | Is it easy to use? | |
| Answer | Like anything, you have to practice for a few hours, the average person learns the basics in approx. 5 - 10 hours. Also if you have never welded before it is easier to use than a conventional torch. If you use a conventional torch already, you must be prepared to slightly change your method of operation e.g.., the angle at which you hold the torch to the work and the way that you use the filler rod, (similar to using a TIG) but you already have the advantage if being able to work with the torch in one hand and filler rod in the other. The Instruction Book and DVD that are included with the kit will assist you greatly with this. | |
| Question | How is the DHC 2000 similar to a MIG or TIG Welder? | |
| Answer | MIG & TIG use an intense narrow concentrated heat and an inert gas shield to displace most of the oxygen in the weld area. The DHC 2000 has a similar narrow concentrated heat and gets rid of most of the oxygen in the weld area by using it as the fuel to power the torch. So its operation is virtually the same as one of these expensive units but unlike both MIG & TIG no shrouding is required from any draft or wind, making it ideal for outside work. | |
| Question | In what circumstances is the DHC 2000 better than a MIG or TIG? | |
| Answer | The DHC 2000 is superior in very thin materials such as Panel Steel, Aluminium or Stainless Steel, mainly due to the relatively low temperature (approx. 3000deg.c.) in the weld area compared to about 7000deg.c. produced by electric welding. In thin Stainless Steel for example the DHC 2000 has approx. half the distortion of a TIG that costs 10 or 20 times the price. Preparation of the weld area is minimal compared to the very intense cleaning required for MIG & TIG. Due to it laying a very flat weld very little grinding & planing of the finished work is required with the DHC 2000 & it is ideal for portable applications such as factory maintenance work where for example, one of our customers who runs an abattoir, repairs stainless steel tools and parts right on the killing chain without the need to dismantle the whole part and take it to the workshop as you would with TIG. |
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| Question | Is the weld strength and quality as good as a TIG? | |
| Answer | Test results confirm the welds of the DHC 2000 to be as strong as a TIG (see test results). The welds also have the huge advantage of being very pliable (unlike the brittle welds of MIG & TIG) and this makes the DHC 2000 more useful in situations where the weld is subject to excessive vibration e.g.., motorbikes, race cars, aircraft, boats etc. The DHC 2000 is not subject to TIG undercut along the weld seam and does not require machining on the plane side, which can be much more expensive than the welding. Also the DHC 2000 weld is the same in appearance/colour as the welded material and does not have the high temperature glaze of a TIG. | |
| Question | Why do a lot of Panelbeaters, Car Restorers & Maintenance People find the DHC 2000 better than the MIG? | |
| Answer | Because the DHC 2000 has similar low levels of distortion, but the welds are soft & pliable which means they are easier to grind if required (e.g.. Shaping a re- built broken lug) easier to Hammer & Dolly (which cannot be done with a MIG because of the brittle weld). No MIG splatter and virtually nil clean up and grinding as welds lay very flat using very little filler wire (or no wire if butt welding). Thin Aluminium (e.g.. Landrover bodies etc.) is much easier. No shrouding or power source required so can be used outside with no porosity in welds, so this means for example maintenance workers can take the DHC 2000 to the job, sometimes even without dismantling, saving large amounts of time. NOTE . Although the MIG appears to be quicker, by the time you have set it up & thoroughly pre-cleaned the job before welding, and then done all the grinding & clean up afterwards, the DHC 2000 would take about the same time because all this cleaning and grinding is not required. | |
| Question | Are there any applications where a MIG, TIG or Conventional Torch are better than the DHC 2000? | |
| Answer | MIG Yes. (and so there should be at about 10 times the cost). In the following situations MIG is doing exactly what it was designed for and does it superbly. Factory Repetition Work Long Factory Runs Eg., Where the MIG is set up to work continuously all day on the same settings, it is the fastest welding process we know of. Please Note . We are talking about professional MIG'S here, not the home handyperson specials sold at your local hardware store, these cheap MIG'S would not even compare to the DHC 2000
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TIG Due to much higher heat levels TIG is a lot more instantaneous on thicker materials (where you would need to spend a few minutes preheating with the DHC 2000 , but most people don't mind this because its about 10 times cheaper) but with TIG care needs to be taken to not just fuse the surface together which is why they perform better used by a professional welder with constant everyday use. Once you get to thin materials especially Aluminium & Stainless Steel most people find the DHC 2000 far superior.
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CONVENTIONAL OXYACETYLENE TORCH A Welding . No, the DHC 2000 easily out performs it in every way that we know of. Cutting. Not really, however if doing a very rough job where the quality of the cut does not matter e.g.., cutting up an old car body, you would probably use one as the DHC 2000 is a precision cutter not really suited to rough work. |
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| Question | Why is it much easier to weld thin Aluminium with the DHC 2000 for an Amateur? | |
| Answer | All other forms of welding e.g., MIG, TIG and especially the Conventional Torch, have the problem of potential collapse around the weld area when the material has become too hot and also difficulty in seeing when this is about to happen,. Although an expert welder could detect this with a TIG, an amateur would find this extremely difficult. The DHC 2000 is much easier because it shows you when its either too hot or too cold!! E.g., if its too hot it will blow a small hole in the job, but not a total collapse of the whole job, so you would just turn the torch down, fill the hole and carry on with your work. If its too cold, the filler rod will either not adhere or sit like Bird Droppings on top of the parent material, this means you put a bit more preheat around the weld area. The problem with TIG welding for the amateur is that the weld can appear to adhere and look like a full strength weld but only be on the surface with virtually nil penetration. With the DHC 2000 weld penetration is much easier and much more obvious to the novice. A lot of our customers actually owned TIG and most found that unless using them all the time they have to constantly relearn to use it. ( See some of our customer letters) The DHC 2000 is a lot easier to use because you only need to use the same technique and same pressure setting for all welding, its that simple !
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| Question | Will I save much on gas consumption & other consumables? | |
| Answer | Yes, DHC 2000 uses approx. half the Gas & filler rods of a conventional Oxy/Acetylene Torch giving massive savings. It also has tips which last for many years, unlike most other welding gear of any type where you can be constantly replacing parts. | |
| Question | What is it like for cutting? | |
| Answer | The DHC 2000 cuts from the thinnest Steel and up to 25mm (1inch), It will also cut Hardened Steel. It cuts with a clean, slag free cut that requires no finishing work. It has a panel cutting attachment that cuts a pencil thin line with virtually nil distortion. It does the job much faster than a Conventional Oxy/Acet Torch and the gas savings are enormous, again using about half the gas of a standard torch. Some of our customers adapt a standard oxy torch's circle cutting attachment to the DHC 2000 guide wheels to achieve perfect clean cut circles. Although it will not oxy cut Aluminium/Stainless Steel, or other nonferrous materials you can cut a thin slot through them (by controlled melting) using the welding tips. |
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| Question | Can I Braze & Solder with the DHC 2000? | |
| Answer | Yes. The DHC 2000 will braze without flux. (excellent for situations where the braze is being painted over, as any flux residue can cause the paint to lift) It will braze galvanized material without flux and without burning off the galvanizing. A special Air/Acetylene Tip is included in the kit for jobs such as soldering and lead wiping. |
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