Clearance Item

Router Buddy Circle Jig

The Router Buddy™cuts the entire circle range of speaker openings from tweeter to woofer with a single tool—without having to make base plate changes! It can also cut countersinks for flush mounting the drivers, particularly the tweeter speakers, to minimize diffraction effects.
  • Save money and time by converting your router into a multi-purpose tool
  • Eliminates having to make multiple base plate changes
  • Cuts infinitely adjustable circles from 2” to 18-1/2” diameter
  • Included fence allows you to cut dadoes and rabbets for perfect cabinet assembly
  • System is very light and compact -- weighs about 2 lbs.
  • Save time. Use template bushing when making multiple cabinets with the same size holes
  • Unmatched for speed and accuracy with set-ups taking seconds
Part # 
Weight: 0.82 lbs.  
This Product Is No Longer Available
Comparable Items In Stock:
Part # 365-250
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Product Details

Router Buddy Circle Jig

The Router Buddy™cuts the entire circle range of speaker openings from tweeter to woofer with a single tool—without having to make base plate changes! It can also cut countersinks for flush mounting the drivers, particularly the tweeters, to minimize diffraction effects. Building good speaker systems requires more than just the ability to cut nice round speaker holes. Speaker box joints must have properly sealed seams, or low frequency performance will suffer. The Router Buddy™includes a full size fence that is adjustable within thousandths of an inch, which provides milling machine accuracy. This feature makes it possible to cut dadoes and rabbet joints with the precision required to ensure good low-end performance, proper alignment of panels, and improved overall structural strength. Because the Router Buddy™is an integrated system that doesn't require the router base plate to be changed, the conversion time from cutting circles to cutting dadoes or using it with Template Bushings only takes about 30 seconds. As a result, speaker enclosures can be built better, stronger, and faster. The combination of all these features in one tool is why the Router Buddy™is an exceptional value for the price and is becoming the #1 choice in router accessories for speaker builders, hobbyists, and the discerning woodworker. Router Buddy™will fit most of the popular routers and can be adapted to fit all routers.

Fits all these popular routers: Porter Cable series 690-890, 7518, 7519, 7529, 7538, 7539, and 8529. DeWalt series 616, 618, 625, and 6128-6184. Bosch 1617 fixed base only, and 1618. Hitachi KM12VC. Milwaukee 5615, 5616, 5619, 5620, 5621, and 5625. Makita 1100 and 1101. Fein FT-1800. Elu 177. Sears 315.175.040, 050, and 070. Rigid R2910 and 2920 bases. Triton TRC001 and MOF001.

Router Buddy Circle Jig
  • BrandPractical Technologies
  • Part Number365-270
  • UPC844632062452
  • Product CategoryCircle Jigs
  • Unit of MeasureEA
  • Product Rating
    (21 Reviews)
  • Weight0.82 lbs.
  • California Prop 65

    Warning: California residents only. Please note per Proposition 65 that this product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

Similar Products

Jasper Circle Jig Model 200
Part # 365-250
View similar products to the Router Buddy Circle Jig
in the Circle Jigs product category.


Router Buddy Circle Jig
Router Buddy Circle Jig is rated 4.1905 out of 5 by 21.
Rated 5 out of 5 by from Router BuddyThis jig works. It is easy to set up and cuts circles of infinitely variable diameter. With a digital caliper achieving accuracy within 0.003" is easy and if you are willing to spend a little more time you can get to within 0.001".While the included instructions could be a little more clear, there are online tutorials available which clearly show how to set up and use the Router Buddy for all of it's designed purposes. Cutting circles is only one of it's applications.
Date published: 2013-05-20
Rated 5 out of 5 by from Router Buddy Circle JigFirst, this is much more than performance, value or features!!!Being in Malaysia, the only 2 router/s from reliable manufacturers with any ( if any ) after sales service, are Bosch GMR 1 and Maktec, which unlike most routers available in the States, are square in base plate shape.So, when I wrote in to 2 companies that sell this jigs here at parts express, 1 replied very abruptly and I was just asked to go back to website ( which I had already been in ). When I tried to reply with some photos of the GMR 1 to ask for confirmation if the adaptor plate would fit, I received a bounced mail advise as its a one way e-mail. Then, i extracted the mail address form the website and forwarded the same mail but it has not been replied to date.I've realized, that for a couple of bucks extra, this product definitely comes with excellent SERVICE and response (post or pre purchase) & thats all I ever need because once there is a mistake from Malaysia, shipping makes the entire exercise unworthy.Now, for those who received the wrong hex key, if you would have just taken the time to inform the manufacturer in a short mail through their website, I am pretty sure they would shipped the correct stuff to you, and even thanked you for information because after few mail exchanges with themand unlike my experience with the other company, I seem to believe in their code of ethics
Date published: 2012-04-19
Rated 5 out of 5 by from Router Buddy Circle Jig Does the JobUnit functions as described and can be adjusted to any desired size. As others have stated the supplied Alan key is not even the right size. A metric 2.5 mm Alan key fits perfect.
Date published: 2012-12-01
Rated 3 out of 5 by from It works, but...First the positives: Yes it may well be the best (circle cutting) tool/accessory available to the DIY speaker builder.Once you get it attached to your router, I cannot imagine you will want to take it off any time soon.Now the negatives;*The alan key (supplied) did not even survive the first attempt to tighten the dove-tail slider. It felt like it was the wrong size and made from garbage steel.*Considering the cost, it would have been nice if the appropriate sized drill bit was included (for the pivot point).*Limited adaptability. Well ok, I live in Australia so you have to expect things may be slightly different here but I found that there was only one router available (Ozito) from the largest hardware distributor in the country (Bunnings) that actually had a base plate with holes that matched this jig. This router proved to be an absolute waste of time and money. (DO NOT BUY IT). Unfortunately, the way the jig has been manufactured means that you cannot just drill your own holes in it to adapt it to other routers, so choose with care.*The next one is more of a 'heads up' than a criticism: Unlike the Jasper jig, you have no calibrated scale to work from, so you trade repeatable accuracy for versatility.There is is one other positive in relation to this experience I feel compelled to mention; The customer service of Parts Express is exemplary. 5 stars.
Date published: 2012-04-19
Rated 4 out of 5 by from FantasticIt's a little cheaper today than when I bought it, but still a bit expensive for a device with no moving parts that doesn't cost a lot to make. However, if you need to make large holes (e.g., for your sub), this is the perfect tool. It makes perfect circles every time. I no longer use my cutter on my drill press even for smaller circles.
Date published: 2012-12-01
Rated 4 out of 5 by from Great SupportI have used this for more then a year when I developed a problem with it. Parts Express put me in contact with the owner of the company that makes it. They replaced the defective parts - out of warranty - with out hassle or question. SUPER CUSTOMER SERVICE. I couldn't ask for better. Using the product is very easy. I had no router experience before I started my first project with this attachment. It made cutting the circles easy a fun.I highly recommend it.
Date published: 2013-03-29

Product Q&A

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who own this product or have experience with it.
If your question requires design or troubleshooting information,
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Router Buddy Circle Jig

Will it cut a truncated hole perfectly?

For example, I will be using the Usher 8836a woofer offered here, and I need to be able to recess it so it lays level with the surface of the baffle. Will it help with making that truncated shaped recessing?
Asked by: Chris.W
It *can* cut a truncated hole perfectly, but it's not something that can be done in one fluid motion, "out of the box" so to speak. You basically use the circle jig to cut the round part of the cutout, and the fence to do the straight edges, separate passes for each part. With a bit of practice, your truncated cutouts will be great.
Answered by: RussR
Date published: 2012-12-01

Is the Router Buddy Circle Jig p/n 365-270 compatible with the Sears Craftsman 320 series 320.27683 router?

Asked by: Benny and the Jets
Yes it should fit your Sears. Answer found in review.
Answered by: Bass4worship
Date published: 2012-08-06

Is the Router Buddy Circle Jig compatible to Makita 3612C Electronic Router[Plunge Type]

Asked by: HK Long
This jig is not directly compatable with the 3612, however a little mount base hardware modification and it works well.
Answered by: Nitnub
Date published: 2012-09-19

Will it fit " Skil Router 1827"?

Asked by: kamaruj
Unfortunately this model is not listed although not all models compatible are listed. I would recommend contacting Practical Technologies directly.
Answered by: MattP
Date published: 2013-03-13

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