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New website

Until recently I operated a website at www.turnedwoodenbowls.com. Because of technical problems with it, I set up my new website here. I think it already looks and works better for visitors than my old one, which I have now closed. It’s easier to manage too, though I still have a lot of work to do on it. I haven’t yet republished all of my old posts, and I still have to transfer some images.

I have migrated my list of subscribers. So if you are one of them, you will be notified when I add new posts, and I thank you for your interest.

I’ve published a couple of new posts here so far, on sharpening and on dust extraction. More will follow, so if you haven’t yet subscribed, please do.

Most of the wooden bowls and other things on my product pages here are new. In due course I shall list stock from my old site here. If you are looking for a specific item, just let me know.

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Getting organised in the workshop

Since my new Titan 315 lathe arrived the workshop has been in chaos. I still have both my old lathes. The Tyme Classic will go off to its new home in the next couple of weeks. Until then it is taking up space and getting in the way. The new lathe is bigger and I have had to move quite a lot of stuff around to make room for it. The process is not yet finished.

I’ve decided I can do without a cut-off saw. Until now I had a cheap Erbauer from Screwfix. I got it chiefly to cut lathe spindle blanks and to make segments for globe horizon rings. It did the former well enough, but was not very accurate for the latter. This was probably at least in part because I did not prepare the blanks well enough before cutting the angles. Its blade had got very blunt and I recently fitted it with a new one. Unfortunately the blade guard shattered when the new blade picked up a small off-cut. Spares are not available for these machines. Rather than replace the saw I have purchased an Incra mitre fence for my table saw. I shall use that instead.

The saw lived on top of one of my homemade chests of drawers. Without it, I was able to stack another chest of drawers on top of that one. It seems to work OK there and the move has given some welcome floor space. But I shall have to re-arrange the drawer contents so that the things I want most often are more accessible. A helpful suggestion from my daughter is to turn the higher drawers upside down so I can see what’s in them from below.

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Turning spindles on the Titan 315

It’s possible to turn small items on any big lathe, but it may not be as user-friendly as a small machine if the tailstock and toolrest are heavy and clumsy. Most of my work is quite small and I knew I would be getting rid of my smaller lathe, so I made a point of turning spindles when ‘test driving’ the Titan 315 before I bought it.

Turning spindles

Now I’ve had time to turn different items in my own workshop, I’m very happy with the result. I made a batch of long spindles. Because I don’t have another rest the right length, I used the long asymmetric one. It needs a wooden strut at the thin end to stop vibration, but with this I had no trouble at all. The rest holder and the tailstock slide freely and lock securely. A little bit of WD40 on the bed helps with this. A rub of wax on the top of the rest lets the tools slide smoothly. The spindles were rock solid between the centres. I didn’t feel at all that a smaller machine would be better for the job. I did find I shall have to take extra care if I go on loading the blanks without stopping the lathe when turning spindles. The powerful motor, heavy toolrest and solid grip mean I really don’t want to get my fingers caught!

Then I set up a larger piece – a reclaimed baluster made of pine, 500 mm long with a maximum diameter of 200 mm. I wanted to reshape it for another purpose.

I tried earlier to do this on my old Tyme Classic lathe but found it tough going. The Titan makes it easy, although the wood is very gritty and full  of cracks.

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Magma Titan 315

Yesterday I posted about turning a bit of 2″ diameter mahogany in my new Magma Titan 315 lathe and had to admit it wasn’t much of a test. Today though I put an 11″ diameter, 17″ long freshly felled log between centres. It would not have fit on either of my old lathes. This was quite a heavy chunk, and its ends were not cut square. I lined it up by eye, not very accurately as it had a definite heavy side that gravitated downward.

Vibration

I thought I would try the traditional vibration test, so balanced a £1 coin on its edge on the headstock, stood well back, and started at the lowest speed on the fast pulley. The Magma Titan 315 is not bolted down, but the coin didn’t begin to wobble until I took the speed up to about 430 rpm. I turned the speed down to about 275 rpm to begin the turning – this was not a piece that I wanted to come loose.

I used the long (about 600 mm, 24″) asymmetric tool rest. It was disappointing to find it distinctly flexible towards the unsupported end.  I was not really surprised at this, although I had been assured that it would be rigid.

Tool rest

This rest is heavily built, but it only has one stem and overhangs too far to be rigid. This makes anything but light cutting at that end difficult or impossible. Perhaps it would be better with a steel web welded at right angles to the main rest bar. This would give it an inclined T or L shape in cross section. However, a loose wooden strut slipped under the end braces it either to the floor or the lathe bed. It then becomes much more solid and will certainly be very useful. The taper helps with this as it allows for some height adjustment.

I turned a ball from the log. It will live in the garden next to the workshop door.

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Titan lathe – smooth and vibration free, with a better finish from the higher speed.

My new Titan lathe is up and running, though I haven’t had time yet to do much with it. I started with a bit of mahogany about 50 x 150 mm between centres. Not exactly challenging, but I didn’t have a usable chuck or faceplate yet). The tailstock ram has a nominal 200 mm travel. With a four prong drive centre in the headstock, the No. 3 MT ram felt as if it could happily force its way right through the mahogany and out the other end. The blank felt rock solid. There was nearly a foot of clear space between the blank and the bed. I switched on.

Titan lathe noise level

The Titan lathe has two different ramp speeds, one that reaches full speed almost immediately, and a slower one that gradually winds up to speed and down again, safer for large blanks. The lathe made a bit more noise at full speed (3000 rpm) than I hoped, but not excessive. At about 1000 rpm it was quiet. I suppose large bearings cannot run silently at speed.

I took a cut with a roughing gouge and in two or three passes made the blank into a cylinder. There was no hesitation or vibration whatsoever. The toolrest is very heavy (40 mm stem) and too deep for the underhand grip that I use. If I don’t get used to it I can easily make up some smaller rests for detail work.

Chuck insert

My Vicmarc 120 chuck had an insert threaded for the Graduate lathe. I remember that I had trouble fitting this insert originally. Because it sometimes came loose when unscrewing the chuck, I used some Loctite bonding agent in the thread. This worked perfectly – so well that even with a large pair of Stilson grips it was impossible to remove. Warming the insert with a small blow torch softened the cement and it was then easy to undo. Loctite doesn’t seem necessary with the new insert.

I screwed the chuck on the Titan, but found a small amount of run-out. This is not a problem with the lathe, it means the insert is not seated properly in the chuck. I was too impatient to correct this, so loaded a small bowl rough-out for a trial cut. This was smooth and vibration free. I compared a cut at about 1000 rpm with one at full speed. There was a big difference at high speed, with much less tear out. The surface was slightly burnished, without ripples.

 

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Magma Black Line Titan lathe

Some time back, I saw a Magma Black Line Titan lathe being demonstrated at the annual woodworking show at Cressing Temple Barns in Essex. They allowed me to try a cut on a bowl the demonstrator was working on. It was impressive, to say the least.

The Titan is expensive, and for some time afterwards I was able to convince myself that I didn’t need one. I already had two excellent lathes – a Tyme Classic and a Graduate short bed. But on my larger pieces they are sometimes at the very limit of their capabilities. The capacity over the bed of the Classic is not enough for some of my work, and the big discs I turn for globe stands need more torque than the Graduate motor could deliver. I was able to turn long items, and wide ones, but not things that were both. So eventually I felt myself giving way.

Thinking that if I were to buy another lathe it should be the best I could get, I took a trip to the showroom of Classic Hand Tools Ltd where they had a couple of Titans set up for customers to test drive. I took along some tools and bits of wood and spent some time trying out the machine. Again I was impressed and decided to place my order.

Which model?

The Magma Black Line Titan Lathe comes in two models, the 315 and the 400, those being the spindle heights over the bed, in millimetres. This would be the last lathe I ever buy, and not wanting to be limited by the lathe, I chose the 400. I paid my deposit a few weeks back. But I soon changed my mind. The 315 can turn up to 25 inches over the bed, and unlimited diameters with the headstock swiveled. Realistically, this is more than enough. I don’t really have the space and equipment to handle pieces bigger than that. CHT agreed to change the order. I paid extra for the 3HP (2.2KW) motor option and a 500mm bed extension, and for help setting up the lathe.

Delivery

CHT delivered my Magma Black Line Titan lathe with a couple of helpers. It came broken down into parts, each of which was a challenge to get into my workshop. This, with assembly and set up, took several hours of hard work. The most difficult job was lifting the headstock assembly on the bed, but we managed by using an engine hoist.

Already, the Classic and Graduate are looking small in comparison with the Titan. My workshop is in chaos as we moved lots of stuff to make way. The priority is getting rid of the Classic, which is now badly in the way. I shall have to keep the Graduate for a while as I must adapt my ball cutting jig and make sure I have accessories to fit the Titan before the Graduate goes. I have lots of work to do before the workshop is properly organised.

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Record grinder and bandsaw each took a lot of work to make them fit for use.

Today I visited a friend who is fairly new to turning and is getting his own workshop ready to make some wooden bowls. He has been having problems with his Record grinder and bandsaw. They are both new machines and it was disappointing to find that each needed attention to make them work properly. This is quite a common thing these days – the maker leaves it to the customer not just to assemble, but to finish the manufacture of the machine.

It’s not just the Record grinder. Machines of various makes may need adjustment and because of poor design may even need modification before they work properly. It is well worth spending a bit of time to sort out the deficiencies. But someone without experience of woodworking machinery may not know how to make these adjustments, may be afraid to modify the equipment, and may not be aware of how a machine should perform. They may blame themselves.

The Record grinder

We started with the grinder. The first job was to tighten the loose retaining nuts on the grinder wheels, which meant taking off the side guards. Before we replaced them, we had to straighten one of the bolts, which was bent. Then we had to get the grinder wheels to run true, using a diamond dressing block. We let the machine run up to speed, then switched off to let the wheels turn more slowly. The vibration was then less severe, making it easier for the diamond to cut back the high spots. We could hear the tick-tick as the diamonds did their stuff. After this, the wheels cut better, more quietly and with much less vibration.

We did not attempt to true up the sides of the wheels although they have a lot of side to side run-out. This is due to the extremely small size of the shoulders on the spindle against which the wheel flanges bear. There is no easy fix for this. The design and construction of the spindle are simply inadequate. But at least we got the edges running true.

The tool platforms on the Record grinder are small, flimsy, flexible and out of square. They can only be adjusted in and out, not tilted. They are of little use for sharpening turning tools, and probably not for other purposes either. One option is to cut off the part of the fixing that prevents the platform from tilting. The thin steel of the platform would bend to make it level. But we decided it would be better to cut off the platforms completely with a hacksaw and make adjustable ones out of plywood. This is a job for later.

The bandsaw

The bandsaw was next, as it was not cutting properly. It was very difficult to adjust the guides, or even to see the lower ones. Adjustments should be easy, because it may be necessary to re-set the guides each time the blade is changed. We started by removing a small plastic shroud beneath the table. It made it impossible to see the lower guide rollers. This shroud prevents accidental contact with the blade between the lower guides and the table.

We then slackened the guide wheels and thrust races so they were well clear of the blade. But in order to do this, we had to remove the table tilt locking lever. And free up the seized lower thrust race adjuster too. This needs more attention as it is still binding and hard to use. Access to it is obstructed when the locking lever is in place.

With the blade able to drift freely, we put on the tension in stages, adjusting the tracking until the blade ran centrally on the wheels, turning them by hand to allow the blade to find its preferred position.

Then we adjusted the guide wheels so they gave good support to the blade above and below the table without binding or deflecting the blade, and set the thrust races to almost touch the back of the blade. We could then replace the tilt locking lever and do a test cut, which showed that the saw now works. It easily cut through some 2 inch scrap wood. And quickly sawed a small log into spindle turning blanks.

A lot of trouble to get two new machines fit to use. Thanks, Record.

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Turning MDF is easy with scrapers, but it’s dusty and blunts the tools quickly.

I’ve been turning MDF discs. MDF is a plain material without visible grain. The discs need a hole drilled in the middle after turning, and I mark the spot for the drill with a little depression turned with a skew chisel. With this material it is not easy to see the exact centre of the spinning disc. Of course a pencil will mark a circle, but I found that if I make a quick random squiggle of pencil somewhere near the middle before mounting the blank, when it spins the centre magically becomes easy to see. This takes just a second when preparing the blanks.

MDF turns well

MDF is easy to turn,  and I use it a lot, often laminated into blocks, though the fibres are a bit woolly when cut. I use the moisture resistant kind as it has a higher resin content and gives a better finish for painting. Some grades are better than others, and this shows when you cut into them. Turning MDF blunts the tools quickly, but the work on these discs is quickly and easily done with scrapers. They are very quick to sharpen if you have the angle set up on the grinder platform. I usually get two discs from one sharpening. I use a round nose scraper to rough out, then a square nose to refine the shape. Finally, another round nose to make the last cuts on the concave detail after the first has done most of the work. The shavings are very long.

It is much easier to turn from the face of the material than the edge because of its structure. MDF is quite strong, but can easily delaminate and split if small diameters are turned. It has a hard surface skin and a softer, more porous core, so sanding is always needed, and the exposed core needs sealing before finishing. You need to take care not to cut too deep into the soft parts when sanding. It’s easy to change the shape.

Dust

It’s very dusty to turn, and good dust extraction is essential if you do it often. Its dust is sometimes said to be particularly dangerous, but there is no evidence that I am aware of to support this. It is as harmful as any other wood dust, but not more so. If turning MDF is more dangerous than turning natural wood, I think that is because it makes more dust.

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Signature tools

If you turn wood for long enough, it is quite likely that you will gradually tweak the standard turning tools to suit your own preferences. They can slowly evolve over time, by accident or design, for example to a different grinding angle or edge profile. If you look at tools belonging to another turner you may think that, while some would need re-shaping before you could use them yourself, others seem worth copying.

Signature tools

Some well-known turners have taken this a step further and put their own signature tools on the market. I’ve bought some of them and perhaps you have too.

I believe though that these tools  often have little or no advantage over the traditional ones. Few of them will make you a better turner. Only practice does that. If you know what you are doing, you can do a good job with almost any tool. For example, I like a shallow fluted spindle gouge for turning small bowls (not with the normal spindle grind of course), while most people prefer a deep fluted one. You can use either. An Ellsworth bowl gouge works very well, but that doesn’t mean my gouges don’t.

Alan Lacer skews

I recently purchased a couple of Alan Lacer skew chisels and wrote about them here. They are excellent tools, well made (except for a problem with the grind described in that post), nicely finished, heavy and strong. The main difference between the Lacers and other skews, apart from their weight, is the shape of the edge. It has a straight section at 90 degrees to the side of the blade and a sharp curve down to the short point. It gives them what I think of as a ‘humped’ appearance. I wasn’t sure that I would get on with this shape, but thought that if necessary I could reshape the edge.

After a trial, I’ve decided that I don’t like the Lacer edge profile. I re-ground them to a gently curved edge as popularised by another turner, Richard Raffan, and now like them better. It’s just a personal preference. I’m not for a moment suggesting that Mr Lacer got the shape wrong or that they aren’t a good buy.

Other designs

There are several types of skew chisel – straight edge, curved edge, oval cross section, rolled sides and round bar. At one time you could buy a square section skew with a diagonal edge going from corner to corner. But I think we can learn from the old time production turners from the 19th century. They had to work hard to make a living and didn’t like to waste time or money. Their tools were tried and tested over generations, and had were effective and efficient in use. Their skew chisels were straight-edged, with long bevels. This made them easy to hone. That was important because they used carbon steel, which doesn’t keep its edge as well as modern high speed steel.

They also used wide square chisels, with no skew angle. They are partly interchangeable with the skews. But the square works well for planing. It’s nice that you can just flip it over to get a fresh edge, so one sharpening lasts twice as long. The skew is better for detailing and cutting end grain.

End grain trimming

Easy end grain trimming is one of the main purposes of the skew angle. When cutting in with the long point, with the chisel placed vertically on its edge on the rest, long point down and with the bevel perpendicular to the cylinder, the skew angle keeps the edge clear of the wood and catches are less likely.

If you use a square-across grind for this cut, you have to tilt the tool to the side to keep the cutting edge clear. So the Lacer, with no skew angle at the long point, is not ideal for end grain trimming. Nor is any tool with rolled edges on both sides. Of course you can still use them for this cut. The Raffan curved edge meets the long point at a skew angle, so works well for end grain trimming.

Both the Lacer and the Raffan skews can peel cut very well.  The Raffan curved edge does not  leave a true cylindrical shape without a separate planing cut. Both can peel down to an existing cylinder without the short point marking the wood.

So after a while I shall probably grind the Lacers yet again. This time, to a traditional old-style straight-edged skew, with a nice long, honable bevel.

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Last job on the redwood globe stands

Today I finished the last job on the redwood globe stands. At least, I hope it is the last. The stands still need polishing and assembly of course, but I don’t have to do that.

The stands each have a big mahogany disc resting on heavy stretchers connecting the four legs. In the middle of each disc will rest the pedestal that I made a few days ago, and between the pedestal and each leg is a decorative button. It is these buttons that I made today.

I had saved some small offcuts of the figured redwood from the leg blanks. I cut some 80 mm discs with the bandsaw, then held them in the stepped engineer’s jaws of my old Axminster chuck. I faced off one side, turned a recess for the small dovetail jaws of another chuck, and made a small V at the centre. Rather than finish the job on my spindle lathe, I wanted to stay on the Graduate for better access, so simply held the small chuck in the bigger one. This increased the overhang, and would not do for all jobs, but these pieces were small. I quickly turned the discs to finished thickness with a bowl gouge and formed a shallow dome on the upper surface.

After sanding, I used the drill press to make a blind hole in the lower side. The  button can now be glued to the mahogany disc with a short locating dowel. The figured wood should look great when sealed and waxed.

This whole job has been a lot of work, cutting and gluing up some large blanks and turning big components at the maximum capacity of my lathes. There has been little room for error, as there was only just enough wood. Any extra would have been hard to source, and very costly. I’m looking forward to seeing the finished stands with their globes installed before they are exported to the client.

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More work on the large redwood globe stands

Some time back I posted about making a pair of large globe stands from reclaimed redwood. I made the leg sections, but put the feet on hold because when cut up I found the wood too wet. Cut to length, with exposed end grain for the moisture to escape, they are now dry enough to finish turning them.

Each blank, about 200 mm  long and 180 mm square, was rough turned to a cylinder with a small spigot on one end. I held the spigot in a chuck while drilling a 12 mm hole right through using an auger with a T handle. I then transferred the blank to my homemade chuck with the tapered steel insert (which is proving very useful for this type of work) and turned the foot with tailstock support. Fairly straightforward, but a little nervy, as there is no spare timber – no mistakes allowed! I double checked all measurements and used a spindle gouge for most of the cutting. 8 feet turned and ready for finishing.

The next job was the central pedestals that support the globes. Two are needed, cut from a 600 mm length of 300 mm square redwood beam. The block was only just big enough, I had to cut it in half with a handsaw – it was too big for my bandsaw, and I didn’t think a chainsaw would have cut straight enough even if there was enough length spare for the kerf. Then I used the handsaw to cut off the corners, a total of about 8 feet of sawing. Redwood is quite soft, but seemed to be getting harder as I went on.

The initial sawcut that divided the block left a reasonably flat end grain surface on each piece, on which I could fix a faceplate. On my Graduate lathe, I could drill the axial hole at low speed, then support the block with the tailstock while I shaped the pedestal. I removed some of the surplus wood while still on the faceplate as it gave a very positive drive. Then I switched to my homemade chuck with the tapered insert. When I did so, I found, as expected, that the axial hole was not so axial after all. The auger had wandered a little. On the taper insert, I was able to true it up and continue with the shaping. The redwood is a little soft, and the maximum torque given by the friction was only just enough on a piece this large, so light cuts were essential.

I did not have a pattern for the pedestals, so to some extent I was designing them as I went along. It was very useful  to be able to remove and replace them on the tapers without losing accuracy.

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Sycamore bowls

I recently made a batch of large sycamore bowls from a tree that came from a garden in Kennington. It was a dead tree that had stood for some time, and the wood was quite porous in places. I always look forward to seeing the cut timber surface. I was able to make a number of rough-outs that have been drying over the summer. They have beautiful figure and slight spalting. I was pleased with the finished bowls until I oiled them, when I found that they soaked up quite a lot of finishing oil and when dry their surface was quite rough to touch. Not only that, there were some pencil lines and scratches still showing – I missed them when sanding before oiling.

There is always some degree of roughness after oiling, and usually it comes off when I buff the bowls, but I tried something different this time. I put them back on the lathe and wet sanded them with white spirit and 320 grit paper. A messy job, but they came up silky smooth. Wet sanding with water can raise the grain, but the white mineral spirit did not affect the wood.

There are three in this batch. Here they are after their sanding. The two largest are about 375 mm in diameter. They will go on my bowls for sale page later, after further coats of finishing oil.

Sycamore bowls after wet sanding
Sycamore bowls ready for final finishing