Using Hole Saw Without Arbor

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Introduction: Using Hole Saw Without Arbor

About: Occupation: Tech Support

How to use a how saw without an arbor.
Sometimes a situation will require that one needs to create a hole but cannot use an arbor with a drill bit.

Parts:
1. Hole saw. In this case a Milwaukee 3/4 inch Hole Dozer was used
2. 1/2 inch hex bolt with the width that would just fit inside the threaded portion of the hole saw. Here I used a half inch bolt from Home Depot with the code "AVO" stamped on it.
3. Locking needle nose pliers
4. Optional: Slip-joint pliers

Step 1: Screw Bolt Into Hole Saw

1. Take the bolt and carefully screw it into the hole saw. Since the threads are not precisely aligned, try to work it in slowly. Because of the misalignment, it will only on it a short distance, but it should be enough.

Step 2: Lock Pliers Onto Hex Bolt

1. Lock the pliers onto the hex bolt.
2. Be sure the grip is firm so that it cannot move.

Step 3: Drill Hole

1. Start to slowly drill into the wood by pushing down into the wood. Rotate it back and forth.
2. If it is a small piece of wood, you could hold the wood at the same time.
3. You can also drill using the slip-joint pliers as well.
4. When using the slip-joint pliers, put the head of the bold all the way into the jaws for maximum hold.

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    5 Discussions

    As someone who once had to solve the problem of not having the correct arbor myself, there is a better way to do this. First, use a bolt with the correct thread. The reason your threads are not fitting properly is because you are using a coarse thread, but because a hole saw is a high-torque application, it uses a fine thread, I know one of the standard sizes you will find on hole saws is 1/2"-20 tpi. If you are using standard coarse threads, a 1/2" thread only has 13 tpi. Aso buy a fine thread hex nut, and before you put the hole saw on, screw the hex nut onto the bolt. Now thread on your hole saw, and once it is threaded on fully, tighten the nut against the hole saw, this will make it so it doesn't slip without messing up the threads. Finally, if you want to get fancy, cut the head off the bolt and you can chuck it up in a drill and drill the hole a lot faster than doing it by hand. Just start slow until you have a bit of a groove or the hole saw will bounce all over the place.

    4 replies

    Thank you necromamcer! Greay information. I will try to find a 20 tpi bolt and update this.

    If you have an Orchard Hardware near you, many of them have a small parts/nuts and bolts section that would probably have one. Ace Hardware is another good bet.

    the link shows a 13 tpi bolt. I would bring the hole saw with you to make sure, as there are 2 sizes of arbor, but it should be a standard fine thread.