Why Pit Type?
- Simple Fixturing: You don't need complex hooks or "lifting eyes." You simply place the part on the hearth.
- Heavy Loads: In a Bogie furnace, the weight is transferred directly to the floor and the wheels of the trolley. This allows you to process a 50 ton engine block that would be impossible to "hang."
- Support for Fragile Shapes: For parts that are flat or have a wide base (like a large die block), resting on a flat refractory floor provides the most stable support.
Ease of Loading
Because the hearth (floor) moves outside the furnace, it is much safer and easier to load with a crane compared to sliding parts into a box
furnace.
High Load Capacity
The “bogie” is a heavy-duty steel structure designed to
support immense weight without deforming.
Versatility
One furnace can hold a single massive turbine shaft or hundreds of smaller castings at the same time.
Durability
The furnace interior is lined with high-grade ceramic fibre or firebricks that can withstand constant thermal cycling.
Steel Mills
For the annealing of large steel rolls or heavy plates.
Shipbuilding
For heat-treating massive engine blocks, propeller shafts, and structural ribs.
Oil & Gas
For stress-relieving large pressure vessels and long pipelines after welding.
Railways
For normalizing wheel sets, axles, and bogie frames (the train’s chassis).
