At Specialty Gear Drives, we specialize in the complete overhaul and repair of Philadelphia Gear units.
All Fields Must Be Filled Out
When a Philadelphia Gear drive goes down, it’s rarely a small problem. These heavy-duty gearboxes are the undisputed backbone of power generation plants, municipal water treatment
facilities, and massive oil & gas operations. You can’t afford to wait months for OEM replacement parts.
At Specialty Gear Drives, we specialize in the complete overhaul and repair of Philadelphia Gear units. We don’t just replace parts—we reverse-engineer and manufacture components to get your critical systems back online in a fraction of the time.
For over a century, Philadelphia Gear (now part of the Timken family) has engineered some of the most complex, high-torque, and high-speed enclosed gear drives in the world.
Why They Dominate the Industry:
Unlike off-the-shelf reducers, Philadelphia Gear units are often custom-engineered for their specific application. Whether it’s a massive parallel shaft reducer driving a cement kiln or a high-speed right-angle drive in a cooling tower, these gearboxes are built with massive cast-iron or fabricated steel housings and highly specialized gear geometries designed to run 24/7 under extreme continuous loads.
Because Philadelphia gearboxes operate in the most demanding industrial environments, they are subjected to relentless stress. When they fail, it is typically due to:
In high-speed applications, even a slight degradation in oil quality or a blocked cooling line can cause thermal expansion, leading to rapid bearing seizure and gear tooth scoring.
Years of massive torque transfer eventually cause metal fatigue. Micro-cracks form on the gear teeth, eventually flaking off (spalling) and sending destructive metal debris throughout the housing.
Extreme shock loads or foundational shifts can cause the gearbox housing to warp slightly. This misalignment destroys bearings and ruins the optimal gear mesh.
Your production schedule can’t wait, and your budget shouldn’t be drained by buying a brand-new unit. We offer an unparalleled service package designed to eliminate your downtime risk:
Because many Philadelphia Gear units are decades old, replacement parts are often obsolete or carry extreme lead times. That is where our facility truly shines. We bypass the supply chain
by manufacturing what you need, right here in Largo, FL.
We completely strip the unit and perform magnetic particle and dye penetrant testing to uncover hidden micro-fractures in the shafts and gearing.
If your herringbone, helical, or spiral bevel gears are destroyed, our engineers use advanced metrology to reverse-engineer the exact profile.
We cut our own precision gears—up to 20 feet in diameter—matching or exceeding original Philadelphia Gear hardness and metallurgical specifications.
We line-bore housings to correct deflection, install premium SKF or Timken bearings, and reset internal clearances to exact OEM tolerances.
The unit is filled with run-in oil and spin-tested under load to monitor vibration, acoustics, and operating temperature.
Trust the experts who manufacture the gears to fix the drive.