Reamer Basics For The Non Machinist

Steve left a comment on my last post where I scored a hell of a deal on a batch of Chucking Reamers saying that he has been following along with my misadventures but because he basically does wood working, is having trouble picturing what it is I am talking about sometimes. I get that, trust me. I am pretty new to this stuff myself and have literally spent HUNDREDS of hours watching Youtube videos trying to educate myself.

My advice to anyone having trouble imagining what I am trying to teach myself here is to do the same thing, get on Youtube. There are literally MILLIONS of machining videos out there and some excellent tutorials if you look.

I found this guy Stuart De Haro a couple of years ago and he has some EXCELLENT tutorials on the very basics of machining, the tooling and how to use them.

Instead of me trying to explain how reamers work, as Steve says, a picture is worth a thousand words, I figure a good video is worth a million.

This is only about 5 minutes long but there is a lot of great info in that 5 minutes. This guy knows his stuff.

You can also head over to Budget Machining for some great content. I have been a fan for years!

11 thoughts on “Reamer Basics For The Non Machinist

  1. Been in the trades 27 years, wish I could have watched that in trade school. A few other points that will hopefully be of help…
    1) Get to know your tools- just because it says a size doesn’t mean it will cut that size.
    2) Test holes are your friend, never trust an untested reamer in anything you can’t afford to
    make twice.
    3) Hole sizing can vary by material (cuts a slip fit in aluminum and a press fit in steel, etc,)
    4) Hole sizing can vary at different rpm and feeds (250 rpm- press/ 400 rpm slip, etc.)
    5) Consistency is your friend. Find the tooling sweet spot and stick with it.
    5a) Practice feeding at a constant speed/pressure
    5b) Power feed is great way to get a consistent finish and size. (watch out in blind holes)
    6) Quick and dirty speeds (assuming 1/64 (.015) material left in hole)
    1/8 to 1/4 – 400 rpm
    5/16 to 3/8 – 300 rpm
    7/16 to 1/2 – 250 rpm
    5/8 to 3/4 – 200 rpm
    7/8 to 1 inch – 150 rpm
    Home shop machinists may be limited by availiable drill press speeds, when in doubt, go as slow rpm wise as possible and keep your feed pressure up. If it’s not cutting, it’s rubbing and rubbing dulls the tool.

    Liked by 2 people

  2. Hey thanks all for the video sites. Will spend some time in awe soon. This 65 year old dude had to go back to work just to afford health insurance. DAMG IT!!!! 12 hour nights aint a great way to work anymore.

    Liked by 1 person

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