41 - Fold-Down Drafting Table, страница 8

END DISK

HANGER ROD

#& X V/2" Fh WOODSCREW

.DRIVE 'DISK

FLAT SPRING

SHAFT

SUPPORT BLOCK

CONNECTOR

RUBBER - FOOT

SHAFT

SHOP PROJECT

^T"' CROSS SECTION ^LJ

Reel & Housing

HOUSING

#8> x V/2" Fh WOOD-SCREW

#g> x V/2" Fh _ WOODSCREW

HANGER ROD

END DISK

DRIVE DISK

SPACER

CONNECTOR

SUPPORT ~ BLOCK

SIDE

.J'.

A To produce an airtight seal, wrap the threads of the pipe fittings with Teflon tape.

The hose reel is made up of two main parts. A circular reel holds the air hose, see drawing. And a triangular-shaped housing supports the reel.

REEL

To direct air from the compressor to the air hose, the reel starts out as an assembly made up of iron pipe fittings, see Fig. 1.

shaft. Besides acting as an air channel, these fittings form the shaft of the reel. To prevent air from leaking, it's important to wrap the threads of the fittings

with Teflon tape before assembling the shaft, see margin.

drive disk. The next step is to add a plywood drive disk (A), see Fig. 1. It transfers the rotation of the shaft to the reel. To make this work, the tee fitting and elbow of the shaft fit tightly in a slot cut in the drive disk, see Fig. la. Note: You may have to file the slot to get a good fit,

end disks. Now you can turn your attention to the two end disks (B), see Fig. 2. These are large plywood disks that keep the air hose from slipping off the reel.

1

FIRST: DRILL ⁹/ie"-DiA.

CENTERED HOLE AND SAND DISK TO SHAPE (SEE PAGE 14)

DRIVE DISK

(614" x 6'/4"-¹/2"PLY.)

An easy way to make two identical disks is to start by carpet-taping a pair of square blanks together. This also ensures^ proper alignment of the holes that are drilled next.

To accept the ends of the shaft, there's a centered hole in each disk. You'll also need to drill a series of holes in a circular pattern for the screws that will be used to assemble the reel.

Now it's just a matter of cutting the end disks to rough shape and sanding the edges smooth, refer to page 14.

spacers. While I was at it, I also made two spacers (C), see Fig. 2. These are large hardboard "washers" with a hole in the center. The spacers prevent the end disks from rubbing on the housing as the reel spins around.

connectors. All that's left to complete the reel is to add a half dozen connectors (D) made from 'W-dia. dowels. Besides connecting the end disks, the dowels form the hub of the reel that the air hose wraps around.

To determine the length of the dowels, you'll need to measure the

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ShopNotes

No. 41