The Rabbit of Caerbannog

Otherwise known as “The Grand Rabbet” (Probably better known as the “Legendary Black Beast of Aaaaarrrrrggggghhhhh”, but that is another matter).

Grand Rabbet

The kit from CMT (sold in Oz by Carbatec) consists of a 2″ rebate bit, and 16 different sized sleeves to produce a wide range of rebates, with a final sleeve with a matching diameter to the bit itself, turning it into a giant pattern copying bit. There is also a packet of spares for the actual double bearings, spacer sleeve, washer and hex bolt that are used as part of the assembly.


Working from left to right, you have the 2″ rebate bit (which is obviously of significant size!!), heavy chunk of carbide on each flute and a decent shear angle as well, so the bit creates a slicing action rather than a straight chipping one (producing a better finish/less tearout).  The first bearing is then added, along with the spacer sleeve (this fits in between the two bearings, and sits in the middle of the rebate sleeve).  You then have one of the range of rebate sleeves to choose, depending on the size rebate required.  A second bearing fits in the top recess of the rebate sleeve producing a very smoothly operating product.  The is capped off with the washer and hex bolt to lock everything onto the router bit.

Rebate Set

One of many different setups, this one produces a rebate (rabbet 😉 ) that is 2″ – 1 3/8″ = 5/8″ / 2 = 5/16″

Or if you prefer, 50.8mm – 34.92mm = 15.88mm / 2 = 7.94mm

You need to divide the answer by 2 to get the final rebate depth.

17 different rebate variations, plus the flush trim in the kit as provided.

So in the immortal words of Tim, the enchanter, I give to you “Well, that’s no ordinary rabbit.” The Grand Rabbet from CMT.

Tim, the Enchanter

Double Rabbet

Had a quick try of the twin rebate bit (in this case the one for the thin glass (3mm))

Picture Framing Bit

Took it in a couple of passes, but the bit didn’t have any problem anyway, and the finish was good.  Particularly given this is meant for the back of the picture anyway.

Twin Rebate

The principle behind the bit is to cut two rebates at once.  The first (narrower) one is for the glass, the second is for the backing.  You could certainly do this with two bits, or two fence positions, or two different sized bearings, but if the intention is to make a few frames, getting to do it all at once saves a lot of effort, and ensures consistency from job to job

Router Bit Kick

On a bit of a kick at the moment, each router bit is like a new tool because they work so differently one from another – some do edging, some shaping, some copying, rebating etc etc.  And there are so many interesting ones out there 🙂

Some that have recently caught my attention, and will be covered individually shortly are some Flai bits, to see how they perform compared to the brands I am currently useful.

Computer Depiction of a Flai Router Bit

I haven’t tried the Flai bits yet – I have a couple, and will be interested to see if they, and particularly their edges perform as well as their saw blades.

Double Rebate

This bit is one of the new ones in the Carbatec range – a double rebating bit.  It is used for picture framing, as it cuts a rebate for the glass (either 3mm or 6mm depending on which of the 2 you choose), and a second, wider rebate for the backing board.

One very useful addition for bearing guided bits is a set of bearings of different sizes.  This allows fine-tuning of how the bits work, increasing their versatility even further.

You can buy a set of bearings – there is a set in CMTs range for example

791-703-00 Bearing Set

But for the price, there is a better way: a rebate bit that includes a set of bearings.  The CMT bearing set is $77, for $22 more you get the full rebate set.

835-001-11 Rebate Set

However, what really caught my eye (when I was shown it by a friend) is

The Grand Rabbet Set

835-503-11 Grand Rabbet Set

Now it may not look as impressive in the photo here, but that is in part because you don’t have a scale reference.  The rebate (or rabbet in American) bit itself is 2″ in diameter.  What’s more, those are not bearings in the box – they are a kind of sleeve.  And the concept is significantly cool.  Instead of having a whole set of actual bearings in the range of sizes seen here (which would be very expensive), these are solid, machined sleeves that fit a bearing top and bottom so they run exceptionally well. The bearings themselves are replaceable (if it ever is needed) at a comparatively low cost.

With the cutter at 50.8mm (2″), there is also a sleeve that is the same diameter, turning the rabbeting bit into the largest flush-trim bit/pattern copying bit that I have ever come across.

Looking forward to getting to try the kit out – bring on the rabbet stew!

Stu’s Shed goes a little greener

Or is that whiter when the carbon loading gets decreased?

I’m not weighing into the climate change discussion / arguments etc, but an opportunity presented itself, and that may be the end result, if not the justification used.  Australia’s primary power generation fuel is brown coal after all.

Through a government rebate initiative, and $8000 grant for installation of solar power systems, we are installing a 1kW system that is costing $8000.  No, it isn’t a huge amount of power generation, but the systems are typically very expensive, so being able to do it without dipping into our own pocket seems a no-brainer. If it wasn’t for the zero-net-cash aspect of it, we would not have made use of the government grant, nor had any solar system installed so a little is better than nothing.

The average over the year is said to be about 6kW / day.  It will be mounted on the house, and feeding into the house supply, but I like to think that while I’m in the shed, the first 1000W I use are solar (whether that be 1000W of my 2400W tablesaw, or half the dust collector’s power requirements or whatever.  The rest of the time the power being generated won’t get wasted – it will be utilised in the house keeping important things in the fridge cold 🙂

Skirting the Edge of Boxmaking

I’ve been intending to get more into some of the classic projects, and time always seems to be against me, but finally got a window of opportunity to start a quick box for Xmas.

Still plenty of steps to go (did the glue-up this evening), so it is progressing at least.

Dovetailed Sides

Dovetailed Sides

The sides have all been (machine) dovetailed. (Ie, using the router table rather than cutting them by hand – leaving that for another day!)  The outside of the box is yet to be sanded, let alone have any finish applied.

The dovetails were cut with the Gifkins Dovetail Jig – a very quick, and successful method for firing out full dovetails. A slot was cut around both the top and bottom of the box.  The lower slot is for the base, with a rebated edge to fit neatly into the slot and sit flush with the table.  In this case, there is also an upper slot which is for a sliding lid.

Lid Assembly

Lid Assembly

The lid is made with a slot all round, both for the tongue and groove joint for the frame, as well as the floating raised panel.  The raised panel was made using a rounding panel bit on top, and a rebate cut on the bottom.

Not much to look at currently – will have some more photos during the finishing phase of the box.

Episode 39 GMC Unlimited Rebate Planer

Back to my previous post….

Coincidentally, (kind of) I just had a courier delivery from GMC of some tools that I am getting to review.  The unlimited rebate planer (GMC) and the new Triton 184mm saw I was keeping an eye out for as they were expected (and I’m very interested in seeing what they are capable of), but the 3rd box wasn’t, and it was the 1500W full width planer.

I can tell you now, that the photo does not do it justice!  The beast is HUGE, and I mean that in the best possible way.  Tim “The Toolman” eat your heart out – this tool is a real man’s tool 🙂  I’m in love, and I haven’t even plugged it in yet.  (You can imagine – I work in an IT department at a University, and I’m walking around swinging this huge power planer doing my best rendition I can manage of Tim’s gutteral “Tool woof”, with an insane glint in my eye, as if any piece of timber (or anything else for that matter), is in imminent danger of being made a bit flatter, and a lot thinner!)

Got to go – I have some sawdust to make!!

I’m surprised someone hasn’t called Security yet….

My office now has an interesting aroma:  I love the smell of machine oil in the morning – it smells like…..victory.

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