American Woodworker

 

Pennsylvania Blanket Chest

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The beauty of hand-cut dovetails without the toil.

 

by Jon Stumbras

 

 

 

 

I’ve always admired old Pennsylvania blanket chests. The detailing is fantastic, from the molded tops to the scalloped bases. But for me, it’s the hand-cut dovetails that really make the old chests special. As much as I admire the look, there’s no way I have the time to develop the skill to hand-cut large-panel dovetails. Fortunately, I’ve discovered the Leigh dovetail jig. It’s given me the ability I’ve always longed for. Now I can create a timeless hand-crafted beauty, like this blanket chest, with relative ease.

 

 

 

 

The Leigh Jig

 

If you like dovetails, you’ll love the Leigh jig. I used the Leigh D4-24 jig because it has all the features this project demands: 

 

• capacity for stock up to 24 in. wide and more than 3/4 in. thick (photo, below right).

 

• variable dovetail size and spacing for a hand-cut look (photo, below right). 

 

• ability to cut through dovetails on the chest and half-blind dovetails on the drawers (photo at right and Fig. A, below).

 

The Leigh jig, on the market for more than 20 years, has a proven track record of dependability and accuracy. A fully featured jig like this will seem a bit complicated at first. Fortunately, the Leigh comes with an excellent manual. With a little practice, you’ll be able to add dovetails to your list of skills. If you take your time with each setup, label your pieces and use test pieces, you’ll have no trouble building this wonderful chest.

 

 

 

The Leigh D4-24 jig is well suited for this project. Adjustable fingers allow you to customize the size and spacing of your dovetails for a hand-cut look. It has capacity for boards up to 24 in. wide and more than 3/4 in. thick, which is necessary for a large project like this. Plus, it will cut both through dovetails for the case and half-blind dovetails for the drawers. 

 

 

 

 

 

Through dovetails

 

 

 

 

 

Half-blind dovetails

 

 

 

 

 

Prepare the Chest Panels

 

Although traditional blanket chests were often made from 7/8-in. stock, we milled our lumber to 13/16 in. That allowed us to use 4/4 stock, which was much less expensive than 5/4 material. It also allowed us to use the Leigh router bits that produce a smaller dovetail that more closely resembles the hand-cut look found on the original chests. You can use 3/4-in. stock to build this chest, but you’ll have to modify the dimensions on a few parts.

 

1. Joint and plane all the solid wood to 13/16 in. 

 

2. Glue up four panels (A, B, C in Fig. B, below; Photo 1). Keep the biscuits far enough in from the ends to allow for trimming to final length and for the 13/16-in.-deep dovetails. Make a poplar practice panel to be used later. 

 

3. Rip and crosscut the panels to final dimension. 

 

 

 

 

Set Up the Jig 

 

Half of the corners (the front left and back right) are cut with the panels set against the left-hand stop. The other half are cut with the panels against the right-hand stop. That means you’ll have to set up the fingers twice, once for the cuts on the left-hand side and again for the cuts on the right. Refer to the manual’s section on Asymmetric Dovetails for complete instructions.

 

4. Clearly mark the outside and inside face of each panel, as well as the top edge. This is critical, as you need to keep correct orientation in the jig. 

 

5. Clamp the back panel (B) against the left stop on the jig. 

 

6. Even though the tails are cut first using the Leigh jig (putting an end to that age-old debate), make sure the fingers are in the pin-cutting mode (pointed end out) when you create the dovetail spacing. The adjustable fingers determine the desired dovetail size and spacing. To set the spacing for this chest, first place the outside fingers just inside each end. Then, pair up the remaining fingers using a 29/32-in. spacer (Photo 2). 

 

7. Make sure all the fingers are tightened securely. 

 

8. After the dovetail spacing is set, flip the finger assembly over to its tail-cutting mode. Now the rounded guide fingers are facing toward you and you’re ready to cut the tails in the right-hand corner of the back panel and in the left-hand corner of the of the front panel.

 

 

 

 

Cut the Tails and Pins

 

9. Attach a 7/16-in. guide bushing to your router base and chuck the Leigh No. 80 dovetail cutter in the router. Rout the tails on the front panel and back panels (Photo 3). 

 

10. To cut the pins, first insert a practice piece into the Leigh jig. The practice piece is used to determine the pins’ proper sizing. The piece must be the same thickness as your side panels, but it need not be as wide. 

 

11. Flip the finger assembly back over to the pin-cutting mode. Insert a Leigh No. 140 straight cutter into the router with the 7/16-in. guide bushing. 

 

12. Reset the depth of the cutter and make test cuts for the pins (Photo 4). 

 

13. Remove the board to test the fit with the back panel. If the joint is too tight, move the finger assembly away from you just a hair. If it’s too loose, move the fingers towards you. It only takes a tiny adjustment of the finger assembly to change the fit. 

 

14. Use a stop block to prevent routing into the drawer opening on the bottom portion at the front of each side panel (Photo 5).

15. Repeat steps 5 through 14 for the cuts made on the right-hand side of the jig.

16. After all the dovetail joints are cut, mark the location of the square shoulder on the side panels just above the drawer opening. (Fig. C, page 57). Square off the shoulder using a chisel.

 

 

 

 

Fit the Two Bottom Panels

 

17. Rout a groove along the inside of all the panels to accept the 3/4-in. plywood bottom (GG) (Fig. C, below and Photo 6).

 

18. Rout the 3/8-in. deep groove for the web frame splines (Z) with a 1/4-in straight cutter (Fig. C). These grooves are cut in the sides only. The web frame is butt-joined with glue to the back of the chest.

 

19. Dry-fit the case assembly with the bottom installed to make sure everything goes together correctly.

 

 

 

 

Glue Up the Chest

 

Gluing a dovetailed case can make your knees go weak, but we’ll show you a few simple tricks to take care of the nerves. 

 

20. Using double-stick tape, fasten clamping pads to the tails prior to glue-up (Photo 7). 

 

21. Use hide glue to assemble the chest. You’ll really appreciate its long open time.

 

22. Fit the plywood bottom into the two sides. Then glue on the front and back panels and clamp.

 

23. Check the diagonal measurement across the top to make sure the case is square. 

 

 

 

 

Build the Web Frame

 

24. Cut the web frame members (W, X and Y) to length. 

 

25. Cut the 1/2-in.-deep grooves for the dust panels (FF) and splines (AA, Z) with a slot cutter in the router table. 

 

26. Glue and clamp the web frame together. 

 

27. Glue the 1-in.-wide walnut face (P) to the front of the web frame.

 

28. On the tablesaw, run a dado through the web frame for the center divider (V).

 

29. Glue the splines (Z) into the case sides.

 

30. Glue and clamp the web frame into place (Photo 8). 

 

31. Cut the grooves for the spline (BB) on the front edge of the center divider and walnut edging (Q). Fasten the edging to the divider with glue and brads. Keep the glue on the top third of the divider only. Fasten the rest of the edge with brads. They have enough give to allow the center divider to expand and contract a bit.

 

32. Glue the center divider into the web frame and fasten using screws through the bottom. 

 

 

 

 

Build the Base

 

33. Cut the base parts (K, L and M) and miter the front corners to fit (Fig. B). 

 

34. Cut biscuit slots for the miters in front and the butt joints in back (Photo 9). 

 

35. Use Fig. D to lay out the base template on a piece of 1/4-in. hardboard or MDF. 

 

36. Rough-cut the profile and file or sand until smooth. 

 

37. Transfer the profile with a marker or a white-colored pencil to all base parts. Then, rough-cut the profile with a coping saw or a bandsaw.

 

38. Attach the template to the base parts and rout the profile (Photo 10). Flip the template to rout both ends of each part.

 

39. Glue the base parts together; then biscuit in corner support (R).

 

40. Glue in screw flanges (N) and glue blocks (S) to the  base. 

 

41. Attach the case to the base with screws through the corner blocks and the screw flanges (see Fig. B). 

 

42. Rout the base molding (T, U) using a classic ogee profile bit. Miter the ends to fit, and glue and nail to the base (not the chest!).

 

 

 

 

Make the Drawers

 

43. Cut all the drawer parts. Rout the drawer-front rabbet (Fig. E) on a router table. Note: The drawer fronts are rabbeted on the top and sides only. 

 

44. Rout the dovetails for the drawer (Photo 11). We used half-blind dovetails in front and through dovetails for the back of the drawer (Fig. F).

 

45. Cut the drawer-front molding profile (Fig. E) with a 5/16-in. round-over bit on a router table and fence.

 

46. On the tablesaw, cut the 1/4-in. x 1/4-in. drawer-bottom grooves 3/8 in. up from the bottom edge of the box parts (Fig. F). 

 

47. Install the 1/4-in. plywood bottoms and glue the drawer together. 

 

 

 

 

Make the Top

 

48. Thickness-plane the boards for the top to 3/4-in. Use biscuits to help maintain a flat glue-up. 

 

49. Sand out any irregularities. Then rip and crosscut the top to its final dimensions. 

 

50. Make the top molding (Fig G) using the same ogee bit you used for the base molding. Cut the spline slot last.

 

51. Before you rout the spline slot in the glued-up top, make test cuts on a piece of scrap until you get a flush fit with the molding. 

 

Tip: If you have a removable router mounting plate, simply lift the router and the plate out of the router table. You won’t need to reset the bit depth from routing the groove in your molding. 

 

52. Mill the splines (G, H). 

 

53. Cut and fit the moldings. Glue the front molding in place using the spline. 

 

54. Glue the splines into the side moldings and attach to the top (Photo 12). Nail the remaining portion of the side molding using brads (Fig. H).

 

 

 

 

Finishing Touches

 

55. Cut the mortise to the full depth of the hinge knuckle (Photo 13). That way no mortise is necessary in the top. 

 

56. Screw the hinges in the mortises; locate the hinge on the top and attach. 

 

57. Attach a pair of safety lid supports (Photo 14).

 

58. Attach the drawer pulls to the drawers.

 

59. We used a Danish oil finish on the walnut. Sand to 220 grit and apply three to four coats of finish. A couple coats of satin varnish will provide added luster and protection. 

 

 

 

Photo 1: Glue the panels of the chest first. Take care to keep the boards’ edges flush with each other. Flat panels are an important goal. They result in better-fitting dovetails and require a whole lot less sanding. Biscuits help align the boards. 

 

 

 

 

 

Photo 2: Set the adjustable fingers to create the dovetail spacing. Start with an outside finger just inside each end of the panel. A 29/32-in.-wide spacer creates the perfect gap between each pair of fingers for this project.

 

 

 

 

 

Photo 3: Rout the tails on the ends of the front and back panels. A guide bushing in the base plate follows the fingers. The dovetail bit is set a hair deeper than the sides’ thickness. These panels are quite long, so mount the jig on a plywood box. Clamp a backer board behind each panel to prevent chip-out. 

 

 

 

 

 

Photo 4: Rout pins in a test piece first. Test the fit. The finger assembly can be adjusted in or out until the dovetail joints go together with a gentle tap of a mallet. The pins are cut using a straight bit and a guide bushing. The pointed ends of the fingers are used to make the pins.

 

 

 

 

 

Photo 5: Rout pins on the real sides. Note that the bottom front edge of each side doesn’t have dovetails because that’s where the drawer goes. Clamp a stop block to the side so you don’t accidentally rout pins where they don’t belong. 

 

 

 

 

 

Photo 6: Rout grooves in the front, back and sides to receive the plywood bottom. Use a straightedge to guide the router. Take care to stop the cuts on the ends of the front and back panels or the grooves will be visible after the case is assembled. The grooves in the sides can be routed through.

 

 

 

 

 

Photo 7: Glue the case together. Dovetails can be hard to clamp because the pins may stick out a bit from the tails. To apply clamping pressure on each tail, attach 1/8-in.-thick clamping pads to the tails using double-faced tape. A hardwood caul over the pads applies even clamping pressure and forces the tails home. 

 

 

 

 

 

Photo 8: Turn the case upside down and slide in the web frame. It’s held in place by splines glued into grooves on the chest sides. Glue and clamp the back edge to the back. Make sure the walnut face is flush with the side. 

 

 

 

 

 

Photo 9: Cut a biscuit slot to reinforce the mitered corners at the front of the base. Position the biscuit slot toward the back of the miter so there’s plenty of depth for the biscuit. 

 

 

 

 

 

Photo 10: Use a template to rout the base profile on the router table. Secure the pattern to the rough-cut base part with double-faced tape. 

 

 

 

 

 

Photo 11: Rout the half-blind dovetails in the drawer front. The drawer fronts are clamped horizontally on the Leigh jig for this operation. Butt the drawer front up against a scrap-wood stop block to correctly position the drawer front in the jig.

 

 

 

 

 

Photo 12: Attach the edge molding to the top with glue and splines. Glue the front molding along its full length. The side moldings are only glued on the front inch or two, then pinned with brad nails toward the back. This arrangement allows for seasonal expansion and contraction that would otherwise crack the top.

 

 

 

 

 

Photo 13: Free-hand rout the hinge mortises in the back of the chest. Support blocks help steady the router on the edge of the back. Rabbets on the blocks create a free zone where you can position, start and stop the router safely. Rout close to the layout lines; then clean up the shoulders with a chisel. 

 

 

 

 

 

Photo 14: Last, but not least, install safety lid supports on the blanket chest. Lid supports are a crucial safety feature that prevents the top from crashing down on an unsuspecting person’s fingers.  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

This story originally appeared in American Woodworker September 2004, issue #109.

Source information may have changed since the original publication date.

 

 

 

 

Sources

 

Woodcraft (800) 225-1153, www.woodcraft.com Leigh D4-24 dovetail jig with standard bits included, $370 Porter Cable guide bushing, 7/16-in., #04C34, $8 Lid safety support left, #04431, $5 Lid safety support right, #04415, $5 Watco oil, #123977, $12 per quart. CMT, (888) CMT-BITS, www.cmtusa.com Leigh No. 128 dovetail bit, #818.132.11, $23 Rabbit bit, 1/4-in. shank, #835.350.11, $32 1/2-in. shank, #835.850.11, $35 1/4-in. slot-cutting bit, 1/4-in. shank, #822.364.11A, $29 1/2-in. shank, #822.364.11B, $29 Classic ogee bit, 1/4-in. shank, #844.350.11, $46 1/2-in.shank ,#844.850.11, $46 3/8-in. round-over bit, 1/4-in. shank, #838.317.11, $34 1/2-in. shank, #838.817.11, $35 5/16-in. round-over bit, #838.285.11, $33 3/8-in. straight bit, #811.095.11, $18 1/4-in. straight bit, #811.064.11, $16. Goby Walnut (514) 926-1079, www.gobywalnut.com 50 bd. ft. 4/4 quarter-figured walnut, $12 per bd. ft. Local lumberyard 2 x 4-ft. sheet of 3/4-in. birch plywood, $18 2 x 4-ft. sheet of 1/4-in. birch plywood, $7 4/4 poplar, 10 bd. ft., $20. Lee Valley and Veritas Hardware (800) 871-8158, www.leevalley.com Two plate handles, 96mm, # 01A56.10, $4 ea. One escutcheon, # 01A19.51, $1 Two brass hinges, 2-in. x 1-1/2-in., #01B02.07, $32 per pair.

 

 

 

 


September 2004, issue #109

Purchase this back issue.

 

 

 

 


Comments

stuartjl wrote re: Pennsylvania Blanket Chest
on 03-03-2009 12:56 PM

I made this chest from Maple & a top of curly maple. Customer loves it.

gepetto wrote re: Pennsylvania Blanket Chest
on 03-09-2009 6:51 PM

It is discouraging see plans that depend on a particular tool for their successful completion.  If one cannot afford the tool, the plans are useless.  Are you teaching woodworking or consumerism?

Robert Romeo wrote re: Pennsylvania Blanket Chest
on 03-10-2009 11:32 AM

please show more vidios

aschaffter wrote re: Pennsylvania Blanket Chest
on 03-14-2009 2:41 PM

Nice looking chest.  I like the jig also.

It might have been easier to build if you had an adjustable height assembly table.  Are you going to do an article on one of those someday?

It would be nice if you could click on the thumbnail photos to view a larger photo.

lugnut wrote re: Pennsylvania Blanket Chest
on 03-15-2009 7:00 PM

Can't wait to start this one.  It is great with its simple but utilitarian design.  The walut looks great.

woodenroo wrote re: Pennsylvania Blanket Chest
on 04-12-2009 8:46 AM

the project plans are very informative and detailed, keep up the great work, I know it will help the average weekend woodworker with their projects.

Pennagirl wrote re: Pennsylvania Blanket Chest
on 06-19-2009 3:25 PM

I wish the magazine would start showing an alternative directions on how to do the dovetails WITHOUT the $600 dovetail jig.  Most hobbyist don't have the kind of money sitting around to spent on a 24" jig.    Beautiful chest but not realistic for a home shop building.

mdbuyer wrote re: Pennsylvania Blanket Chest
on 07-04-2009 7:22 PM

I would like to see a "Printer Version" so I could print out these instructions without all the advertisements. I cannot keep running back and forth from where I'm working to the computer to learn what is the next step. I tried printing out the page but the printing was on top of the pictures. We're woodworkers, not computer experts like you have. We want to BUILD, not compute with our wood.

sbdcouncil wrote re: Pennsylvania Blanket Chest
on 12-25-2009 9:18 PM

I saw some comments about expensive tools and consumerism, one of my first "big" projects was an heirloom cradle I wanted to build before my first child was born.  I didn't have any of the right tools, or the proper skills, and I put the cradle in the trash 2 weeks she was born.  I did end up pulling it out and finishing it.  It's not a precision masterpiece, but my wife wouldn't trade it for anything.

Most woodworking plans require tools and skills I don't have, but each time I do one it's an opportunity to learn new skills, and from time to time, slowly add to my tool collection.