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Jensen-style Z-Chair #15: Arm rough shaping and fitting

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Blog entry by Ross Leidy posted 06-09-2019 07:52 PM 811 reads 0 times favorited 4 comments Add to Favorites Watch
« Part 14: Back stile dowel holes Part 15 of Jensen-style Z-Chair series Part 16: Arm mortises »

The arms on the original chair have a little raised lip along the outside edge that tapers-off to nothing at the front tip of the arms. I’ll try to do something similar.

I used the CNC to sculpt the long, shallow concave section on the top of the arm using a 2” diameter cove bit.

With the rough shaping done on the top, I moved on to beveling the two ends of the arms where they join the back and arm support.

I cut shy of the sketched curve and will use a rasp to fine-tune the shape.

I rough-cut the long taper on the bandsaw, and then sanded to the line with the disc sander.

Arms fitted and ready for mortises.



4 comments so far

View 489tad's profile

489tad

3605 posts in 3406 days


#1 posted 06-11-2019 01:13 AM

That arm certainly is more involved than I would have ever thought. You are doing a great job working through the details of the chair.

-- Dan, Naperville IL, I.G.N.

View Ross Leidy's profile

Ross Leidy

59 posts in 2336 days


#2 posted 06-11-2019 03:32 AM



That arm certainly is more involved than I would have ever thought. You are doing a great job working through the details of the chair.

- 489tad


Thanks – I think that shaping and fitting the arm will be the most challenging part of the project. Now that they’re part way done, I feel that I’m on the downhill slope.

View Tango's profile

Tango

101 posts in 3948 days


#3 posted 06-13-2019 12:23 AM

Hi! good to see your posting again! Amazing work.
Can you take a picture of the arm/frame from the side? I think I see a soft curve between the arm and the frame and the original is flatter at that point. Don’t get me wrong…your work is outstanding but I don’t know how close to the original you want to be and just trying to help.

View Ross Leidy's profile

Ross Leidy

59 posts in 2336 days


#4 posted 06-13-2019 01:49 AM



Hi! good to see your posting again! Amazing work.
Can you take a picture of the arm/frame from the side? I think I see a soft curve between the arm and the frame and the original is flatter at that point. Don t get me wrong…your work is outstanding but I don t know how close to the original you want to be and just trying to help.

- Tango

Good eye. I did have to compromise a bit on the arm shape due to the thickness of my stock. With the 1” stock, in order to get a decent lip along the edge of the arm and maintain a 1” joint between the arm and back (which I know is already a smaller joint area than the original), I had to have a steeper slope from the joint to the dip in the arm. I could have laminated some more cherry to thicken the stock in the joint area of the arm, but I wanted to avoid seeing a glue line, so I decided against it. If/when I build a walnut version, I’ll want to get some thicker stock so that I can soften that curve.

I be sure to take some photos of the arm from the side at some point. Hopefully, the steeper slope from the joint won’t be too distracting.

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