Grizzly   |  Model: G8748
Hand Tapping Machine
Price: $124.24
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Grizzly G8748 - Hand Tapping Machine


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Our G8748 Hand Tapping Machine provides stability, precision and sensitivity to the hand tapping process. The cast iron construction of the base and over-arm gives a rigid setup that resists tool breakage. Precision ground surfaces on the base and hardened spindle means perpendicular perfection; no more off-axis tapped holes. The counter-balanced spindle allows far more sensitivity than an ordinary tap handle.

Other features include: quick setting work holder, 9 tap holders that snap-lock into spindle, rack for tap holders, adjustable height collar and off-set handles for quick return. Can be bolted down to use as a tapping station! Collet sizes include: #6, #8, #10, 1/4", 5/16", 7/16", 3/8", 1/2" and 5/8".


  • Overall dimensions: 22-1/2" x 12-1/2" x 14"
  • Throat capacity: 7-3/8"
  • Height capacity: 7-7/8"
  • Table size: 6-1/2" x 12-1/2"
  • Work holder maximum opening: 6"
  • Approx. Shipping weight: 45 lbs.
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17 Customer Reviews (4.5 out of 5 stars): Sign in to write a review

james H

Dowel pin in figure 7 on counterbalance missing.
Detention ball on the bottom of spindle missing.

David H
Functions as advertised. 5/10/2018

Simple easy setup, make changes quickly and sturdy construction make this tool a winner.

Lots of sharp edges! 3/9/2018

The price is very reasonable, but be aware that it will come slathered in oil, and will have lots of sharp edges. I ended up with a cut and a deep metal splinter while cleaning, de-burring, and assembling. I also find the design to be poor in the area where the tap adapters mount to the spindle. The detent wont function on its own, you need to rotate a sleeve to expose the detent ball (this is actually how its supposed to work, and the manual is clear about this), but then the ball falls out. Once recovered its still a little fiddly to get the adapter in place, the detent ball in place, and the sleeve rotated back. What a pain.

Once installed it works well. If you had lots of the same size holes to do its fine, but if you use different sizes often you may want to consider other options, or adapt some sort of tap chuck to the unit and leave it permanently installed.

I bought this because I thought it would be quicker and easier that using a tap guide and hand tap, but I dont think it is.

Randal R
One of those must-have tools if you do any fabrication or manufacturing! 2/21/2018

I bought this to tap several hundred aluminum parts that my local machine shop wanted $$$ to tap for me. (Hole Size: 5/16-18 x 1" - Blind Hole). By itself this is a great tool if you need to tap straight holes. With the addition of mist coolant (ebay - $16 approx. - make sure and get the one with dual controls) and a spiral tap (Amazon - $5.73 - YG-1 F4 Series Vanadium Alloy HSS Spiral Flute Tap), this machine almost becomes automatic! Screw in and out with one hand! Sure it's cheaply made (set screws on shaft collar and tap holders strip out) but for the cost you can't go wrong. You would spend more money in broken taps over a few years than to just buy this. We are still using the same spiral tap we started this job with! Best tool purchase so far for 2018!

Great at Tapping Holes and Not Your Budget! 2/17/2018

I've had this unit for a while now and have come to love it more and more with every use! After messing around with various jigs and fixtures I can confidently say that with a bit of cleaning and the odd little touch-up this is the best Tapping Machine you can get for the price . It's one of those tools you didn't ever think you'd need, however, after the first use you can't believe you didn't buy it sooner. No Muss, No Fuss... No Crooked Threads!

Great, but mine had a defect. 12/1/2017

This is great addition to my shop. My unit had a defect; the Handle bushing was mis-drilled. I could not insert the tapered pin through the bushing and shaft. Luckily, I have the equipment to properly re-drill the Hande bushing. Now it works great. See the attached photo.

Andrew W

This product is pretty good, but could use one slight improvement. The ring used set the depth stop was turned and has concentric grooves, so when the column moves up and down, the balance shaft wheel doesn't travel smoothly across the ring.

Other than that, it does it's job well. I used it to tap a bunch of 4-40 and 6-32 holes, and it kept the tap vertical, and had excellent feel and feedback.


Bought this product because I had 50 1/2-13 UNC holes to tap as well as 100 1/4-20 UNC. worked like a charm. Every hole straight and true, handle gives good leverage so it is not too hard to turn and then quick to back out of hole. I Would highly recommend!

edward L

product works like expected-very happy with it - saves a lot of time for very little money

Mike E
Good deal 1/27/2017

More than I need for the tasks I normally have, but sufficient for those, tapping up to 1/4-20

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