Written on May 12, 2010 at 7:05 am by Power Tool Team

Twist Drill Bit

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Twist Drill Bit
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75mm Twist Bit 50mm Stainless Steel Hole Saw Cutting
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US $15.17

Metal Plastic Wood Drilling 28mm Twist Drill Bit 10pcs
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US $4.09

5Pcs Straight Shank Twist Bit 14mm for Electric Drill
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US $26.43

Can A Step Drill Bit Replace Your Reamers?

Using a step drill bit has become much more popular over the last decade for a variety of reasons. Most notably, there have been a lot of changes made to the overall design, which means that you have more options to choose from. While this means that you can do a lot more with a step drill, there are some limitations as well depending on what type of material you are using. However, under the right circumstances, they can not only bore and counter-bore, but also ream fairly effectively. So does this mean that they can replace your collection of reamers completely?

The point of using reamers is that you can create a much more precise and smooth surface finish than a traditional twist drill bit. When used correctly, a step drill bit can often achieve these same results. The key is being able to determine if the conditions are suitable. To determine this, you need to consider both the material that you are working with as well as the total thickness or depth. Additionally, you need to determine what type of bit you are using. There are two basic types of step drill bits - threaded and non-threaded. Threaded bits are less precise and used with a twist drill, while non-threaded are often used with a hammer drill and can be more precise.

Using a step drill bit is ideal when you are working on lexan, plexiglass, and fiberglass because it will not break or damage them like a regular twist drill will. With these materials, it will almost always be much easier to opt for a step drill over a reamer. The same holds true for sheet metal. Not only is sheet metal very thin, which gives you ample control over the size of the hole that you create; but it is also relatively thin.

There are some limitations to what a step drill bit can do though. The first thing to keep in mind is the depth that you will be working with. These types of bits get progressively larger the further into the surface they go. If you are creating a very deep hole, then there is a chance that the bit will make the top portion larger than it should be. In general, you will need to use a reamer if the material is more than ¼ inch thick, although some people argue that anything beyond an eighth of an inch thick is too much for this type of drill bit. Keep in mind that the thicker the material, the more lubricant you will need to use.

As you can see, there are a variety of situations in which a step drill bit can completely replace your reamers. However, when looking at the big picture this isn't the case. There are still plenty of scenarios in which using a reamer will be more effective. Most notably, when the hole that you are creating is going to be fairly deep or the material that you are working with is too thick. The final conclusion is that it is ideal to have both in your toolbox.

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step drill bit
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reamers
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How can I get bolt and nut loose- Stripped and Rusted/corroded?

I have an old Craftsman lawn tractor. It is covered on the outside of the shed.(good mower- In the shed)
After the winter, I went to remove the battery(I already new it was bad) and it was all extremely corroded and rusted to the battery wires. I could remove the neg. side but not the pos. side.
I did manage to remove the battery(the bolt and nut are rusted so badly together that i twisted the bolt through the battery connector)

How can i get the bolt undone??

Ive heard I could get a metal drill bit and drill through it, ive heard i could cut it...I dont have a "dremel saw" or whatever its called
will bolt cutters cut it?

NEED HELP
Where can i get a new postive battery cable... or clamp?

is it easy to change/fix/replace?

if the bolt and nut is still connected to the cable i would cut the cable as close to the bolt as possible and put a new connector on the wire. that would be a lot less hassle and is quick to do

DEWALT DW1956 Pilot Point Twist Drill Bit Assortment Review