HB 4400 | Portable Hydraulic Magnetic Drill

Hydraulic for Marine and Construction – Works Underwater

  • Portable Hydraulic Magnetic Drill
  • Portable Hydraulic Magnetic Drill

  • Features
  • Safety
  • Accessories
  • Ideal for industrial, construction, marine and mining applications
  • Drill structural steel and other metals
  • Automatic lubrication
  • Hydraulic motor safe for underwater use
  • Manually operated permanent magnet with ratchet control

Max. Hole
Twist Drill
Maximum hole diameter
Maximum twist drill diameter
Motor Power
Motor Speed
Ø 2-1/16"
1.5 HP
6.5 GPM @ 2000 PSI
0-630 RPM

  • Model HB 4400 Specs
  • Standard Equipment
  • In Action
Motor Power (Hydraulic)1.5 HP
Weight 48.5 lbs.
Hole Capacity2-1/16" dia
Twist Drill Capacity1/2" dia.
No Load Speed, Variable0-630 RPM
Hydraulic SupplyFLOW 6.5 GPM @ 2000 PSI
Magnetic Base Size7-1/4" L x 3" W
Dimensions18-1/2"H x 12-1/2" L x 7" W
Magnetic Force (3/8" plate)1300 lbs.
Arbore Bore3/4" Weldon

HB 4400 Standard Equipment

Standard equipment includes safety straps, allen keys and operating instructions.

Using the HB-4400 to attach steel repair plates to underwater pylons

Portable Magnetic Drills
Diver Drilling Holes With Portable Magnetic Drill
Steel Repair Plates
Mild steel 3/16" thick was bent to the same shape as the existing bulkhead steel sheeting.
Diver Drilling Holes
Repair plates were bent and holes punched around the perimeter. Plates were lowered over holes and held in place from above. Diver used HB-4400 to drill 15/64" holes around perimeter of plate into pylon.
Diver Secure Steel Plates
Drill Tital Zone
Diver Securing Repair Plates
After the tide dropped to low tide, the work was done without a diver's hat.
Diver Securing Plates 
Diver Secures Steel Plates
HB 4000 Underwater Portable Magnetic Drill
Diver Securing Repair Plates
Diver uses air impact wrench to secure plate to pylon with a single stainless steel self-tapping screw.
Diver Securing Repair Plates
After one screw was secured, the HB-4400 was then used to install 12 to 16 screws around the perimeter of the plate.