Single blade reamers - who knows about them?
Single blade reamers - who knows about them?
(OP)
Hello all,
We have a new drilling system, after waiting forever it seems on suppliers to get their lazy arses into gear, we finally have one. It is a Mapal unit, in 21,50mm diameter.
Now we require a single blade type reamer to go with the high speed / high penetration rates we need for production.
What have people experienced with these types of reamers? Any recommendations for brands and suppliers? We are in Australia, but buy tooling from all over the world.
We require an excellent finish, and H8 tolerance from 22,00mm hole.
We have a new drilling system, after waiting forever it seems on suppliers to get their lazy arses into gear, we finally have one. It is a Mapal unit, in 21,50mm diameter.
Now we require a single blade type reamer to go with the high speed / high penetration rates we need for production.
What have people experienced with these types of reamers? Any recommendations for brands and suppliers? We are in Australia, but buy tooling from all over the world.
We require an excellent finish, and H8 tolerance from 22,00mm hole.





RE: Single blade reamers - who knows about them?
Being a fluids guy you are going to need a fluid (coolant) with very high levels of hydrodynamic lubrication to get the best results.
good luck and happy learning
A.R. "Andy" Nelson
Engineering Consultant
anelson@arnengineering.com
RE: Single blade reamers - who knows about them?
Here are two systems that we have use for precision hole in tool steels. The diamond hone from Engis is the best. One feature is you can't go oversize. The Helical is essentially the same thing.
http://www.engis.com/products/honing/
http://www.helicallap.com/
RE: Single blade reamers - who knows about them?
What is the issue with single blade reamers?
Also, we are working with annealed tool steel, not hardened. Process is mostly completed, then sent for heat treatment. We don't require the roundness that you are stating.
RE: Single blade reamers - who knows about them?
RE: Single blade reamers - who knows about them?
I still would look to tighten your hole size tolerance.
Our procedure for working tool steels ,mainly D2. A2, T15, is machine to approximate size heat treat and finish by grinding or honing
RE: Single blade reamers - who knows about them?
What do you mean by "both holes could be broached?" You mean a broach reamer?
We won't be changing our process to include any milling or grinding of the holes - we don't have the gear, and I don't use contractors for such things, we are Australia where manufacturing is almost a dead art here.
All work will be done on our Mazak Machining center.
The tolerances are not that critical. If they fit as close as you may like, the item will never be of much use, as it will jam up easily with dirt etc. Call this field experience....
The part that fits inside the bore (the action bolt) is also made on the same machinery, same issues, except external of course. ALl parts are hand finished.
RE: Single blade reamers - who knows about them?
In the Dreamer information they say they can go to 1.5" as their standard size is 5/8" max.
You could buy one at you local tool supplier and check the results.
http://www.dreamertoolinc.com/
Again I was thinking way ahead as I was thiinking of using a push type round broach for the through holes. The do make a broach for blind holes.
http://www.warrenbroach.com/punchBroach.html
RE: Single blade reamers - who knows about them?
http://www.wincoindustries.com/
They can do anything. Awesome to work with. I think the name of the product you want to get from them is called an "Adjustable Padded Reamer". It has an insert and can be calibrated to the diameter you need.
Enjoy,
Ken
RE: Single blade reamers - who knows about them?
In the Dreamer information they say they can go to 1.5" as their standard size is 5/8" max.
You could buy one at you local tool supplier and check the results.
A dreamer being a drilling reamer? Maybe help me out by explaining what you mean in initial posts. I am not up with machining terminology. I doubt we could buy anything like that at our local supplier, as I have difficulty getting pretty much anything you can think of.
RE: Single blade reamers - who knows about them?
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I did buy my dog's medicine in Australia. Even with the freight it was still 30%-50% cheaper than the local Vet.
Here is a better picture of round push broach.
You are probably not familiar with a product called Astroturf used in door mats but we used a round broach to broach over 33,000 5/16" holes in drums used to make the product. We used the quill of a Cinnamatic Milling maching to push the broach.
http://www.dumont.com/prod9c.html
You are probably not familiar with a product called Astroturf used in door mats but we used a round broach to broach over 33,000 3/8" holes in drums used to make the product. We used the quill of a Cinnamatic Milling maching to push the broach.
RE: Single blade reamers - who knows about them?
Am very familiar with Astroturf, I used to play on the international field hockey pitches in Western AUstralia while at school.
Still wondering about a reamer, using rotation provided by the main spindle of the CNC. We have a simple honing machine also, that has been used quite successfully in the past. All we need is to get the finish from the reamer better than we get now. Around 0.0002" or better should be ok.
RE: Single blade reamers - who knows about them?
RE: Single blade reamers - who knows about them?
How much and when can you do a reamer? I already sent an RFQ on your website. Any chance of replying?
RE: Single blade reamers - who knows about them?
How is the machining going?
http:
RE: Single blade reamers - who knows about them?
Well, what a timely question. I just yesterday received our new single blade reamer from Walter Germany. We are now able to produce the items we make to the standard we require.
The reamers you suggest are much too short, by around 80mm, or over 3 inches. We require 200mm cutting depth @ 22mm diameter. Close to 10D hole depth.
Anyway, the reamer works well. Took a few holes to get it sussed out, but had no bin jobs nonetheless. It works at quite a high speed, and due to the hole being a bit small, it the feed rate is slower than the book says. It works at 60m/min V, and 0,09mm F/rev. Facing, drilling, reaming and threading takes 7 minutes.
Am very happy with the outcome, although it did cost AU$2000, or around US$1800. A bargain really.
RE: Single blade reamers - who knows about them?
Glad to see that the tool is doing the job. As you state the tool is a bargain if it does the job essentially out of the box. As I use to tell my boss the cost per hole gets less for each new hole.