Deep Hole Drilling
About DHD
The Deep Hole Drilling facility is located in Rockford, Illinois, and offers 100+ years of combined experience in deep hole drilling, spade drilling, ejector drilling, trepanning, and honing. Our full-service facility has the drilling capacity you need when you need it.
- Gundrilling | diameters from .078” to 2.50” and lengths to 24.0 feet
- Spade Drilling | diameters to 10.00” and lengths to 20.0 feet
- Ejector Drilling | diameters to 2.56” and lengths to 6.0 feet
- Trepanning | diameters to 9.00” and lengths to 14.0 feet
- Honing | diameters to 20.00” and lengths to 24.0 feet
At Deep Hole Drilling we focus on service. Our business is built on it. From quick, accurate price quotes to reliable, on-time deliveries, our entire organization is designed to get the job done. Our reputation for quality and dependability, along with a modern manufacturing plant, experienced professionals, top-notch craftsmen, and a century of hole drilling expertise mean you get unmatched value and service in deep hole drilling.
Spade Drilling
Ejector Drilling
Trepanning
Gundrilling
Honing
Gundrilling Machines
Wirfs Gundrill
- Dual Spindle
- 15” Stroke
- 0.875” dia Drilling Capacity
Wirfs Gundrill
- Dual Spindle
- 21” Stroke
- 0.875” dia Drilling Capacity
Wirfs Gundrill
- Dual Spindle
- 28” Stroke
- 1.000” dia Drilling Capacity
Wirfs Gundrill
- Dual Spindle
- 36” Stroke
- 1.000” dia Drilling Capacity
- Knee Type
Wirfs Gundrill
- Dual Spindle
- 48” Stroke
- 1.875” dia Drilling Capacity
Wirfs Gundrill
- Dual Spindle
- 70” Stroke
- 2.000” dia Drilling Capacity
Wirfs Gundrill
- Dual Spindle
- 144” Stroke
- 3.500” dia Drilling Capacity
DeHoff Gundrill
- Dual Spindle
- 48” Stroke
- 1.625” dia Drilling Capacity
Eldorado Gundrill
- Dual Sindle
- 15” Stroke
- 0.750” dia Drilling Capacity
Eldorado Gundrill
- Dual Sindle
- 15” Stroke
- 0.750” dia Drilling Capacity
We can drill diameters up to 10" and lengths up to 24 feet.
Horizontal Boring Mills with Deep Hole Drilling Capability
G&L Gundrill
- 3-Axis
- 5.0” dia Drilling Capacity
- 48.0” x 78.0” Table
Marcel Gundrill
- 3-Axis
- 5.0” dia Drilling Capacity
- 48.0” x 78.0” Table
TechniDrill Ejector Drill
- 3- Axis
- 1.000-2.562” Dia Drilling Capacity
- 48” x 72” Table

Lathes with Deep Hole and Trepanning Capability | Honing
Gisholt XL Turret Lathe Trepanning Machine
- 3.0” – 10.0” dia Drilling Capacity
- 31.375” Swing
- 256.0” Bed
Gisholt L Turret Lathe Trepanning Machine
- 3.0” – 10.0” dia Drilling Capacity
- 31.375” Swing
- 192.0” Bed
Sunnen Honing Machine
- .125” – 2.50” dia x 120” Capacity
(2) DHS Honing Machines
- 1.00” – 20.00” dia x 120” Capacity
We also supply raw materials and sawing services.