View Product
Animation for G4185
Your Cart ×
Estimated Total: Checkout Now
For many projects, the precise location of drilled holes can make or break the job. You can try your luck with guesswork and jigs, but you'll rest easier with this Horizontal Boring Machine, which delivers highly accurate results every time. Your workpiece won't slide away from the bit because the powerful pneumatic clamp exerts over 600 pounds of force! Plus, this versatile workhorse allows the use of multi-bit boring heads to make your workflow even more efficient.

Boring heads must be purchased separately.


  • Motor: 2 HP, 220V, single-phase, TEFC
  • Amps: 12
  • Table size: 15-3/4'' wide x 9-3/4'' deep
  • Spindle travel: 3''
  • Table travel, vertical: 3-1/2''
  • Drill bit capacity: 9/16"
  • Spindle speed: 3450 RPM
  • Air consumption: 0.5 CFM @ 90 PSI
  • Maximum SPM: 12 @ 90 PSI
  • Overall size: 15" W x 47-1/2" H x 37-1/4" D
  • Approximate shipping weight: 346 lbs.


  • Precision-ground cast-iron table
  • Dovetailed miter gauge and slot
  • Pneumatic clamp and spindle travel
  • Accepts RH threaded boring bits
  • Preformed steel stand
  • Dovetailed table ways
  • Convenient foot pedal control

1 Customer Review (4 out of 5 stars) : Sign in to write a review

Anonymous Reviewer
G4185 Horizontal Boring Machine Review 02/18/2020 4:32:14 AM

I am lucky i had seen/ used one of these machines in the past because otherwise i probably wouldn't have purchased it... if you have a production setting where you repeatedly drill holes- this machine will be your best friend. That being said, be aware of the following... you must purchase a spindle head (example the G5953) in addition to this machine...it does not include a usable spindle/ chuck/ or colett. The user manual is "fair" but far from "good". An example of its failure would be - nowhere does the manual talk about the pneumatic speed adjustment, nope nada nowhere... you just have to randomly see a fairly hidden knob and think- "i wonder if that does something?" The Machine is a tank...very solid/ heavy, durable and looks to be well built. I feel like every part of it is much stronger/ more powerful than it needs to be... You will likely need to modify the piston that plunges down to hold material as it is plastic and has the friction coefficient of about zero...its plenty powerful in the downward force however- be carful... I added a very dense rubber pad to the bottom and it will probably hold anything now. Be ready to search for drill bits to fit the threaded spindle as they are not easy to find and once you find them it becomes another task to get them in usable/ variable lengths. I must add that the people on the tech support side of Grizzly should all be given gold stars...very nice people, easy to work with and want to actually help you resolve your issues.