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Router Repair - Installing a Large Hole Sub Base (Porter Cable Part # 42188)

4,448 views · Published 23 June 2015 · 2:21 · Indexed 6 November 2026

Channel: FIX Tech Guides · 2015 · Howto & Style

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http://www.ereplacementparts.com/router-sub-base-large-center-hole-p-89329.html Click here for more information on this part, installation instructions and more.

This particular sub base is specific to Porter Cable manufactured brands. To find a sub base specific to your model, visit eReplacementParts.com.

If your router is showing any of these symptoms; replacing the sub base could solve your problem:

1) Base is cracked or broken
2) Base center hole is too small for router bits
3) Cannot see the work piece clearly through the sub base
4) Using profile bits and roundovers

eReplacementParts.com part number: 42188

Tools used for this repair/replacement:

1) Phillip’s screwdriver

Get model-specific repair help from eReplacementParts.com. Learn how to troubleshoot, diagnose and repair your power tools and equipment with illustrated instructions, hundreds of step-by-step repair videos, and our DIY forum. If you have a power tool or appliance problem, we can help. https://www.ereplacementparts.com/articles-c-8873.html

[ VIDEO TRANSCRIPT ]

Hi, I'm Mark from eReplacementParts.com. In this video I'm going to show you how to replace the standard sub base on your Porter Cable router, to a sub base with a larger center hole. The standard sub base on your Porter Cable Router has a fairly small center hole. That center hole is set up specifically to accept guide bushings for template work.  A lot of the bits we’ll use will be larger than this opening. You can always run the bit through the opening, but if you do, then you'll never be able to use the sub base again for template guide bushings.

So the solution is to use a sub base with a larger center hole. Porter Cable sells this base as an accessory and it simply bolts over to your router. Replacing the sub base on your Porter Cable Router is easy to do and I'm going to show you how. Sub bases, as well as many other parts, can be found on our website.

Let’s get started.

We’ll begin by removing the standard base from the router; it’s held in place with three screws. The large-hole base includes screws, so I will set the standard plate, as well as its screws, aside.

Now we can install our large-hole base. I line it up with the screw holes in the cast base, and initially I will just start the screws. I won’t tighten them down until each one has been started into the casting. Now I can tighten them up. You'll notice how much larger the opening now is. This will give you a lot more versatility when using profile bits and round overs. Also, the large-hole base is clear, which makes it easier to see what you are doing when routing.

And that's all it takes to replace the standard sub-base on your Porter Cable Router to one with a larger center hole. If you found this video helpful, be sure to give us a thumbs up, and leave a comment.

[ END TRANSCRIPT ]

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