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I used this to recess and cut holes for a set of speakers I find the only thing to keep in mind is that when completely cutting a hole out it would be beneficial to make one pass that nearly cuts through and then plunge the router further to make the final cut through. It also comes with a small tube to hold all the screws which is something that ever tool should come with. This is an absolutely jig and its amazing that it doesn't exist at the local stores. The reason is that otherwise the wood will come off center as you are about to complete the circle and you'll get a lump in the side. Absolutely worth the price if you plan on cutting more than one diameter circle. Following the instructions leaves no questions unanswered and it performs perfectly. In recessing holes it produces absolutely repeatable results.
It's the kind of tool after using I'd consider paying 3 times the price to get one in laser etched anodized aluminum rather than plastic. However, it works very well if you don't break it. I give it only 3 starts becuase made out of acrylic, it's essentially a consumable and WAY too pricey for that. This thing works great, is precise, and repeatable (which is it's primary value over some other jigs including homemade ones) Unfortunately, the material is just not up to being mounted and dismounted a lot, so use care and watch the torque when mounting it.It's one of those odd tools. Given the fragility of the material, and the fact the cheap materials means there has to be a HUGE markup, it is overpriced.
The Pivot Pin Is A Tight Fit, No Play With this Little Feller. Nothing Worse Then A Botched Up Front Baffle For Your New Speaker System.This Unit Is For Plunge Routers With A 1/4" Collet And The Use Of A 1/4" Router Bit. This Jig Will Route Very Accurate Recessed Areas and The Cut Out Area Also, For A Very Professional Look.The Unit Was Very Easy To Install And Align On My Skill 1823 Plunge Router.
For Routing, A Standard 1/4" Bit Will Work Fine, But A 1/4" Upper Cut Spiral Bit Is A Better Choice. Unit Is Made From Acrylic Plastic So A Little TLC Is Required For Years Of Trouble Free Use. For First Timers, It Takes Abit Getting Used To And Highly Recommend Doing Some Practice Work On Scrap Stock To Get Comfortable With It.
This Jig Is A Must If You Are A DIY Speaker Builder. As An After Thought The 1/8" Drill Bits Extra Length Is Easier To Work With Then The Pin. A Good Buy.
Just Follow The Directions If All Else Fails And You Will Be Up and Running Shortly. Do Recommend Having A Spare Pin Or 1/8" Drill Bit Laying Around For BackUp.
I quickly discovered that the 1/4" bit specification is for real because the 3/4" diameter bit wouldn't pass through the opening on the jig.No problem - just plug in the router, dial in a slow speed, and plunge the 3/4" bit through the jig itself. Don't try this with anything larger or you'll lose the ability to center the jig on the router base using the supplied calibration disk.The jig does a nice job, works easily, and does what it's advertised to do. I bought the Jasper model 400 circle jig for a DIY loudspeaker project to cut holes and to provide countersink lands for the drivers. By enlarging the center opening, I lost the 1", 1-1/16", and 1-1/8" pin holes, but for holes this small I'd probably just use a hole saw anyway. I'd buy another in a heartbeat when this one breaks or wears out, especially for Amazon's current price of just under $20 bucks. I use it with a Bosch 1617EVSPK plunge router. I appreciate the supplied calibration disk and 1/4" pin that allows the jig to be centered easily on the router base.The jig is designed to be used with a 1/4" diameter cutting bit but I wanted to use a 3/4" diameter bit for a large woofer countersink land.
Item is semi-consumable because of softness and thickness of the plastic it is made from, but very good accuracy for my needs.I did receive wrong item from Amazon vendor so I am commenting on an item I bought locally. Extra pins are almost essential as tool is useless without it. I have used this product previously for acrylic manufacturing and found the pivot point holes to be very accurate. It is very helpful to use a drill press instead of a hand drill for the holes.
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