Photo Index - DeWalt Products Co. - 7790 Type 9

Machinery Photo Index

Manufactured/Badged by:
DeWalt Products Co.
Leola, PA; Lancaster, PA; Towson, MD

True Manufacturer:
DeWalt Products Co., Leola, PA; Lancaster, PA; Towson, MD

Machine Specifications
Machine Class:	Wood Working Machinery
Machine Type:	Radial Arm Saw
Machine Size:	12" blade
Submitted By:	James Lane

Machine Specifications
Description/Model:	7790 Type 9
Date of Manufacturer:	1988 appro
Serial Number:	Unknown
Last Updated	4/18/2012 12:09:54 AM

Comments:

The DeWalt 7790 Type 9 was one of the last radial arm saws marketed by Black and Decker using the DeWalt name. It is different from earlier 7790's in a couple ways: 1) It was manufactured in Europe, some say in Italy. All the fasteners (nuts, bolts, etc) are metric, 2)There is a change in the miter latch. Type 9 has it about five inches in front of the column, which puts it in an easier to reach position. There may be other changes, but I haven't seen a Type 9 sitting right next to an earlier Type, so I can't say. It will (like all 7790's)swing a 12" blade, but B&D made that "upgrade" from a 10" blade, doing only a bare minimum. They added a "miter bumper" screwed to the back of the yoke to keep the 12" blade from cutting into the column base. In photo 5 you can see where this happened (before I bought it). When I purchased it, the miter bumper had been bent out of position and was being used to hold the power cord up!!
I purchased this after seeing an ad for it in Craigslist. The owner had purchased it as surplus property from a university where it had been owned by the theatre department, but had now decided he really didn't need it. Apparently it had been purchased when someone in the theatre department knew how to use a radial arm saw. After that person left, the saw had been largely unused and had been shuffled from storage room to storage room, losing a few parts in the process. Marks on the saw indicate that it had been used once or twice by somebody who had no idea how to use a radial arm saw, and it was probably fortunate that it had been put in storage before someone suffered serious innjury. One or two of the parts missing when I bought it, precluded that the saw could be adjusted and used safely, most notably, the rear trunnion bushing, which holds the back side of the motor in position was missing.
Other than the missing parts, the saw was in remarkably good condition. I don't think it had been used for more than a couple hundred hours. After ordering the missing parts from the Original Saw Company and Wolfe Machinery, it was mainly a matter of fitting a new table and adjusting to get it back in excellent condition. It had some light surface rust from its time in storage, so I painted it with heavy duty black paint, which was the original color.
It has frequent hobbiest use, but that means probably ten to twenty hours a month - not much.

Photo 1:

Comments: Left view of saw ready for use
Source: My camera

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Photo 2:

Comments: Overall view from left, showing legs and added tool shelf, chich hides the serial number plate unfortunately
Source: My camera

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Photo 3:

Comments: Overall view from right
Source: My camera

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Photo 4:

Comments: Miter controls. The miter latch has been moved for Type 9. Also shows the "miter bumper"
Source: My camera

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Photo 5:

Comments: Saw with 10" blade mounted, 8" and 12" blades on table. Note the saw cut in the column base above the 12" blade.
Source: My Camera

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Photo 6:

Comments: Motor plate. Saw serial number plate is hidden by the tool shelf
Source: My camera

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