Used/Rebuild
Factory Rebuilds and Retrofits
Kays Engineering offers factory rebuild services for all DeHoff, Eldorado, and TechniDrill machines. By refurbishing your used machine, you get the performance and reliability of a new machine without the new machine price.
All full rebuilds offer the newest control options as retrofits and employ the latest technologies, which enables Kays Engineering to offer a 12-month warranty on all factory rebuilds, the same as our new machines.
Machine Rebuilds
Machine rebuilds can include any of the following, depending on customer needs:
Machine Component Replacement
- Re-grind the Slide Ways
- Re-machine and hand-scrape Gibs and Straps
- Replace and hand-scrape Chip Box
- Spindle Test and Break-in
- Full re-paint
- Spindle Bearings
- Spindle Motor
- Spindle Lube System
- Spindle Drive Belts
- Ball Screw and Bearings
- Rotary Coolant Union
- Hoses and Fittings as needed
- Spray Shields and Bellows
Electrical Component Replacement
- Latest Machine Control featuring Beckhoff components
- Variable Frequency Drive
- Encoder Feedback Servo Drive System Motor
- Motor Starters
- Wiring
- Electrical Enclosure
Coolant System Component Replacement
- New High Pressure Pump
- Rebuild High Pressure and Transfer Pump Motors
- Replace all wiring, Hoses, and Fittings as needed
- Full re-paint
Used Machines
Used DeHoff 1036 Gundrill
- Drill capacity: 1.00 inch (25.4 mm) diameter
- Slide travel: 36 inches (914 mm)
- Spindle HP: 5 HP
- Spindle RPM: 400 – 6,000 RPM
- Coolant capacity: 300 gallons
- Coolant HP motor: 30 HP
- Coolant HP pump: 60 GPM
- Enclosure covering drill motor, spindle, and drill
Used Eldorado M60-30 Gundrill
- Drill capacity: 0.125 – 1.000 inch diameter
- Slide travel: 30 inches
- Spindle HP: 5 HP
- Spindle RPM: 800 – 3,450 RPM
- Coolant capacity: 90 gallons
- Coolant HP motor: 5 HP
- Coolant HP pump: 20 GPM
- Workpiece fixturing – Chipbox-mounted 6-Jaw Chuck and Pneumatic Tailstock
- Enclosure covering spindle motor, spindle, and drill
Used TechniDrill 1.00-48 3-Axis BTA
- BTA Drilling Diameter: 1.00 inches
- Drilling Depth: 48 inches
- X-axis Travel: 16 inches
- Y-axis Travel: 10 inches
- Z-axis Travel: 48 inches w/ 1 vibration dampener
- Worktable Dimension: 32” x 26” plus troughing
- Spindle Motor: 15 HP, Infinitely variable speed
- Spindle Speeds: Infinitely variable from 500 – 2,000 RPM in two ranges
- Feeds: Variable from 0.1 – 24 inches per minute, plus rapid
- Chipbox flying bushing: Stroke = 0.5”, capacity = 1.5” gundrill
- Coolant System Capacity: 200 gallons
- Coolant pump motor: 20 HP AC
- Filtration: 10 micron
- Flow rate: 40 GPM max
- Pressure: 1,500 psi max
Used Eldorado M75-15 Gundrill
- S/N 1970
- Year of Mfg = 2000
- Drill capacity: 0.039 – 0.750 inch diameter
- Slide travel: 15 inches
- Spindle HP: 3 HP
- Spindle RPM: 1,440 – 11,500 RPM
- Coolant capacity: 90 gallons
- Coolant HP motor: 7.5 HP
- Coolant HP pump: 20 GPM
- Eldorado Quick-Loc Fixturing System Included (used for round parts w/ on-center holes). Uses a 6-Jaw Chuck on the chipbox with a swing-open pneumatic tailstock.
Used Eldorado M75 Four-spindle Gun Barrel Drilling Machine
- (2) two-spindle machines, (2) coolant systems, (1) shared chip conveyor
- Eldorado M75-48T Gundrilling Machine
- Serial Numbers 1056, 1057
- Two spindles
- 0.750 inch drilling capacity
- 48 inch slide travel
- 3 whip guides per spindle
- F20 coolant system
- Updated controls with touchscreen
- Shared chip conveyor
- Barrel load & unload automation
- Barrel Lengths = 18.5” – 24.5”
- Barrel OD = 1.032” – 1.312”
- Eldorado M75-30T Gundrilling Machine
- Serial Numbers 1058, 1059
- Two spindles
- 0.750 inch drilling capacity
- 30 inch slide travel
- 1 whip guide per spindle
- F20 coolant system
- Updated controls with touchscreen
- Shared chip conveyor
- Barrel load & unload automation
- Barrel Lengths = 10.5” – 18.5”
- Barrel OD = 1.032” – 1.312”
