
SD HOUSINGS | BOLT-ON
The bolt-on SD Housings are compatible with the Pit Bull™ feature and the Melfred Borzall patented FastBack® Solution for direct pullback. These tough-as-nails transmitter housings are our premium offering and feature-rich. Heat-treated alloy steel provides maximum strength and durability. Keep everything tight and secure while in use with our double locking lid bolts. The SD Housings are compatible with any Ditch Witch® or Vermeer® bolt pattern.
- Large lid tabs to lock into place
- Pit Bull & Fastream® compatible
- Dual SuperNozzles
- Shock-absorbing internal rubber bumpers
- Integrated supplemental MudBoost™ port for extra fluid flow
- LidLock roll pin keeps the lid securely in place

SD HOUSINGS | THREAD-ON
The Thread-on SD Housings are compatible with the patented FastBack® Direct Pullback System. These housings are heat-treated with chrome-nickel-moly alloy steel just as our bolt-on transmitter housings. The Box by box design provides unmatched versatility and value so you can use your Eagle Claw SD, Iron Fist or bolt-on blades (using a bit body) with one housing. The stainless steel timing mechanism makes clocking the transmitter to the bit a cinch. The straight-through gun-drilled fluid ports make the transmitter housing easy to clean.
- Heat-treated, alloy steel for maximum strength
- FastBack® System compatible for direct pullback solutions
- Shock-absorbing internal rubber bumpers in sonde cavity & lid
- Chunky hardfacing on high-wear areas
- Integrated supplemental MudBoost port for extra fluid flow
- LidLock roll pin keeps the lid securely in place

THE TRI-CON DRILLING SYSTEM
Upgrade your drilling game with the patent-pending Tri-con Drilling System. This system features a non-threaded, triangular connection with a greater contact surface and 25% more tensile strength than competing designs. With a pit as small as 18” in diameter, you can go from pilot bore to pullback up to 4X faster than traditional setups.

UNIVERSAL HOUSINGS | THREAD-ON
Our Universal Housing will fit both 15” and 19” transmitters and are 100% compatible with major transmitter manufacturers.
- Compatible with 15″ Subsite™ transmitters
- Compatible with 15″ or 19″ Digitrak transmitters
- Made from durable heat-treated, chrome-nickel-moly alloy
- Large lid tabs offering more excellent contact surface, reducing wear and tear
- Double lid-locking security with lid bolts & a roll pin to keep your transmitter secure
- Compatible with Melfred Borzall’s Eagle Claw SD, Iron Fist, and Bolt-On Bit Bodies

HIGH FLOW HOUSINGS
Maximum mud flow with minimum restriction. The Melfred Borzall End-Load, High Flow Housing is a perfect match for your next rock job when utilizing a mud motor or air hammer. It has the design, strength, and flow capacity to handle the toughest rock bores. Ideal to use with Mud Motors. Run your mud motors at maximum power and efficiency, even on long bores.
- Heat-treated, chrome-nickel-moly alloy steel for maximum strength and durability (the same high strength, fatigue resistant steel used in landing gears and propeller shafts)
- Multiple fluid passages allow for maximum flow without pressure restrictions
- End-load design for maximum torsional, compressive, and bending strength
- Simple, interchangeable internal mechanism allows the same housing to be used with most locating systems
- Accommodates Digitrak™ 2-cell, 4-cell, and cable transmitters (Mark V systems and newer); Subsite 86B, 86BV2 Beacons
- For rigs from 20,000 to 400,000+ lbs. thrust
- Stainless steel springs support and cushion the transmitter, allowing it to be used with air hammers, as well as Mud Motors
