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Post by stevef45 on Oct 11, 2021 13:30:48 GMT -8
I ran out of #80 bits. I had a some from a website that sold them in a large kit from #60 to #80 and a pin vise in a nice wooden box. I cannot remember who sold it but the bits were much better than the ones from walthers. Can anyone recommend a site for #80's or the like that are quality? I'll spend the extra money if they are better bits. Just sick of the crappy ones that are so dam fragile.
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Post by jonklein611 on Oct 11, 2021 13:57:13 GMT -8
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Post by nsc39d8 on Oct 11, 2021 18:30:51 GMT -8
Highly recommend McMaster Carr!
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Post by cera2254 on Oct 11, 2021 19:12:02 GMT -8
It has been a bit, and I found I had much better luck just using #79 bits as they are so close but significantly stronger, but as always your mileage may vary.
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Post by fr8kar on Oct 13, 2021 5:58:17 GMT -8
I've been buying carbide bits from drillbitsunlimited.com for years now. I'm happy with the bits I get from them.
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Post by packer on Nov 8, 2021 19:21:38 GMT -8
I bought my last group on Amazon. I still have some left, I went for steel as I tend to break carbide ones.
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Post by valenciajim on Nov 9, 2021 16:19:02 GMT -8
I just purchased two vials of #79 and #80 bits from a company called Gyros on Amazon. They seem to work OK so far. They were very reasonably priced.
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Post by glenng6 on Nov 9, 2021 22:16:04 GMT -8
valenciajim,
Thanks for the info. Looks like an interesting website. Glenn
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Post by fr8kar on Nov 10, 2021 18:39:48 GMT -8
I bought my last group on Amazon. I still have some left, I went for steel as I tend to break carbide ones. There are definitely times when you want steel and times when you want carbide. It's good to have both kinds on hand so you can use the right bit for the situation. |
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Post by Colin 't Hart on Nov 25, 2021 13:11:07 GMT -8
I bought my last group on Amazon. I still have some left, I went for steel as I tend to break carbide ones. There are definitely times when you want steel and times when you want carbide. It's good to have both kinds on hand so you can use the right bit for the situation. When do you want steel? When do you want carbide? |
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Post by fr8kar on Nov 25, 2021 20:27:28 GMT -8
There are definitely times when you want steel and times when you want carbide. It's good to have both kinds on hand so you can use the right bit for the situation. When do you want steel? When do you want carbide? When I have a long hole to drill or one that's not perpendicular to the entry surface (and most especially the exit surface!), I will use steel bits instead of carbide. The reason is steel can flex and take shear forces. For example, if you're drilling on the outside corner of a model and the bit will exit the other side of the shell in the corner, unless you exit exactly in the corner one side of the bit is going to be free and the other side will still be trying to cut. That will force the bit to bend and carbide doesn't like to bend. So instead of bending it will break and the bit will be lodged in the incomplete hole. Steel bits don't have a problem with corners or the friction of a long hole. You can get a carbide bit to make a long hole, but you'll have to clean the flutes much more frequently than if you were using steel bits. Of course the cut isn't usually as clean with a steel bit, at least not the steel bits I have, but that's a small trade off for not breaking a bit off inside the incomplete hole. For pretty much everything else I encounter carbide bits are superior. The cuts are clean and the bits remain sharp over time. They require less pressure to get the job done, and that makes a difference when you're using #75 and smaller bits. I don't think I could make a steel #92 bit last very long, but a #92 carbide bit used in the right way with no more pressure than the weight of the pin vise will last for a long time. The key is making sure pressure on the bit is only coming from one direction: centered on and in line with the rotational axis of the bit. For situations where you can't guarantee this will be the only source of pressure, use steel bits. |
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Post by loco8107 on Nov 26, 2021 20:05:26 GMT -8
I long gave up on 80 bits- the 79’s are a lot stronger and do the job just as well.
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Post by glenng6 on Nov 28, 2021 19:28:02 GMT -8
valenciajim, Thanks for the info. Looks like an interesting website. Glenn Well, as I said, the website seemed interesting. Interesting enough to go back and buy a "GYROS Keyless Mini Adaptor Chuck." I have already used it on a couple of projects and it is a very good quality. I have wanted a mini chuck for a long time, so thank you, valenciajim, for pointing out this website. Glenn |
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Post by valenciajim on Nov 29, 2021 19:34:32 GMT -8
I long gave up on 80 bits- the 79’s are a lot stronger and do the job just as well. I am reaching a similar conclusion. |
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Post by loco8107 on Nov 30, 2021 11:30:21 GMT -8
I long gave up on 80 bits- the 79’s are a lot stronger and do the job just as well. I am reaching a similar conclusion. The constantly breaking bits gets old after a while. Even after being extra careful. |
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