Grizzly   |  Model: H7789
Mortising Attachment Kit
Price: $87.95
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Grizzly H7789 - Mortising Attachment Kit

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Model: H7789
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This Mortising Attachment Kit, with its variety of interchangeable bushings, will fit just about any drill press for boring precision mortises. The entire kit includes cast iron chisel holder and fence, hold down assembly, quill alignment pin, 1/4", 5/16", 3/8" and 1/2" chisels, 3 two-piece bushings, 3 split bushings and carrying case. Just match your drill press quill diameter to the nearest ID bushing dimension. Not recommended for use with "baby" drill presses.

Bushing sizes include: 2.945" O.D. x 2.600" I.D., 2.600" O.D. x 2.366" I.D, 2.366" O.D. x 2.170" I.D., 2.600" O.D. x 2.000" I.D., 2.600" O.D. x 1.880" I.D. and 2.600" O.D. x 1.570" I.D.

Works with the following drill presses:

  • Grizzly G0485
  • Grizzly G0491
  • Grizzly G7943
  • Grizzly G7944
  • Grizzly G7947 (with additional purchase of G9716 quill collar)
  • Grizzly G7948 (with additional purchase of G9716 quill collar)
  • Shop Fox W1680
  • Sears 21313
  • Sears 21315
  • Sears 21317
  • Delta 11-990
  • Delta 14-070
  • Delta 17-900
  • Delta 11-090
  • Jet JDP-14MF
  • Jet JDP-17M
  • Jet JDP-17MF

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6 Customer Reviews (5 out of 5 stars): Sign in to write a review

5/ 5stars

I bought this about 2 month ago and have used it twice and the product works great. I took a few tries to get it setup the first time, but after I figured it out it work great. It is imporant to keep the tip of the drill bit oiled so it does not over heat.

5/ 5stars

This mortising attachment kit did the job I had to do but I have to say it is a low quality version of what it can be. \r\nCertainly not the best.

Mortising jig
5/ 5stars

I've been very happy with the unit overall, but I am having a great deal of difficulty with the 3/4" drill and/or mortising bit. They seem to overheat, no matter how often I withdraw and reinsert the drill.. The smaller bits presented no such problem.

Drill press is awesome and very well made
5/ 5stars

Bought this a month ago and have loved drilling and using the mortis attachment. Great product.

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