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If your drill motor has a tapered spindle, it's most likely a Morse taper as opposed to a Brown & Sharpe, Jarno, or other style. However, in many cases manufacturers offered different taper styles as options. Add to that even if it is the most common Morse taper it could be one of several sizes. Morse tapers go from the smallest size #0 to the largest size #7. The most common on smaller machines are a #2 or a #3. As mentioned, earlier if there's a slot in the side of the spindle, you'll need a drift or key to remove the drill bit. Here's a link to some drifts at the MSC website.
https://www.mscdirect.com/browse/tn...rc=aw.ds#navid=2108652&refinements=Type:Drift
Once you determine what size spindle taper you have rather than buy taper shank drills, I would buy either a drill chuck with a built-in arbor to fit the machine or buy an arbor and a drill chuck as separate pieces. The most common taper on a stand alone drill chuck is a Jacobs taper. Like the Morse tapers they come in different sizes. Here's a link to a chart at Little Machine Shop giving the sizes and dimensions of several common tapers.
littlemachineshop.com
The advantage of a separate arbor and chuck is that you can use the arbor on a number of different size or style drill chucks. The advantage of a fixed arbor and drill chuck is that it's quicker to change out, and the chuck will always be true to the arbor. If you go the independent chuck and arbor route, you'll also need a set of Jacobs taper wedges to remove the chuck from the arbor. Here's a link to some wedges on the MSC website. They are on the bottom half of the page.
https://www.mscdirect.com/browse/tn...rc=aw.ds#navid=2108652&refinements=Type:Drift
Once you determine what size spindle taper you have rather than buy taper shank drills, I would buy either a drill chuck with a built-in arbor to fit the machine or buy an arbor and a drill chuck as separate pieces. The most common taper on a stand alone drill chuck is a Jacobs taper. Like the Morse tapers they come in different sizes. Here's a link to a chart at Little Machine Shop giving the sizes and dimensions of several common tapers.
Dimensions of Standard Tapers
This page give the dimensions of Morse, Jacobs, Brown & Sharpe, and Jarno tapers.
The advantage of a separate arbor and chuck is that you can use the arbor on a number of different size or style drill chucks. The advantage of a fixed arbor and drill chuck is that it's quicker to change out, and the chuck will always be true to the arbor. If you go the independent chuck and arbor route, you'll also need a set of Jacobs taper wedges to remove the chuck from the arbor. Here's a link to some wedges on the MSC website. They are on the bottom half of the page.
