Getting Started

Turning the Sarado

I decided to start the project by turning the sarado. I chose to start with the sarado because it presents some unique challenges.  A shallow dish must be formed on both ends which differ slightly in diameter and a large cove must be turned centered between the two dishes.

First I mounted the square blank into my chuck allowing the corners of the blank to fall in the gaps between the jaws.  With a spindle roughing gouge I rounded the blank (left image below) being careful not to turn its diameter less than 1 ¾” and squared up the end (right image below).  I was also careful to turn the blank parallel so that it would sit flat in my V-block when I later drilled the hole for the ken. 

Fig 05 thumb Fig 06 thumb

 

At this point I measured and marked the finished length of the sarado and turned the blank to hair more than 2 ¾” long.  Next I created the dish shape in each end using both a spindle gouge (left image below) and a French curve scraper (right image below) to develop the correct depth and concave shape.  I made a stiff cardboard disc equal to the specified 2 ⅜” diameter of the tama to help gauge the shape of the dishes. 

Fig 07 thumb Fig 08 thumb

 

Once the dishes were properly formed I measured the length of the blank and marked the center of the length. I drew a line around the circumference with the blank slowly revolving on the lathe.  Before removing the blank from the lathe I sanded the dishes on both ends.

I removed the sarado blank from the lathe and using a V-block and a ⅜” brad point bit I drilled a hole through which the ken will pass. 

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What Next for the Sarado

The dilemma next is how do you hold the blank while turning the two different sized dishes, the ozara and the kozara, and the large cove between the dishes while holding the blank in a chuck without damaging it with the chuck jaw corners?  I could not figure out a way to do it with a chuck so I didn’t use one.

I decided to turn the sarado between centers using golf balls to drive the blank.  I drilled holes in two golf balls; one sized to snugly fit over my drive center and a second to fit on the live center.  I mounted the “golf ball” centers in my lathe and mounted my sarado blank between the balls allowing the balls to seat in the bottom of the dishes.  I turned on the lathe to make sure the blank was running true and tightened up the tailstock to apply enough pressure so that I could drive the blank and turn the wood with my tools.

Once the blank was secure I measured 7/16” from the end which would become the big dish (ozara) and ⅜” from the small dish (kozara). I then drew lines around the circumference of the blank to establish the width of the large cove between the dishes.

With a sharp spindle gouge and light cuts (since the blank was being driven by golf ball friction alone) I formed the cove (left image below).  Using the cardboard template I checked to see that the cove was shaped to match the curvature of the ball (right image below). 

Fig 10 thumb Fig 11 thumb

 

Once satisfied with the shape of the cove I turned the slight tapers on each end to create the correct diameters for the dishes. The measured drawing specified a difference of 1/8” in diameter between the dishes.  I used calipers to fine tune that difference. 

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Once all the turning was done I sanded the blank while it was still mounted between the golf balls.  The golf balls provided just enough clearance on the ends so that I could sand the sharp edge on the dishes.

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Tuesday the 21st. Thanks for visiting Woodturners Unlimited.