Plastic Extruder Gearbox

A: Select the gearbox based on your extruder's screw diameter and maximum required output torque. The center distance typically correlates with screw size (e.g., a 90 mm screw generally pairs with a 173 mm center distance unit or equivalent). Verify your required screw speed (rpm) and motor input speed (1450 rpm for 4-pole) to calculate the exact transmission ratio: Ratio = Motor Speed / Screw Speed.

A: We utilize heavy-duty axial thrust roller bearings housed in a rigid front chamber. This design is engineered to transmit the full magnitude of screw back-pressure directly into the gearbox housing without transferring destructive axial loads to the input shaft or motor.

A: Standard models are frequently stocked as semi-finished assemblies, allowing final ratio configuration and dispatch within 15 to 25 business days. Fully customized gearboxes with non-standard center distances, housing dimensions, or specialized cooling systems typically require 45 to 60 business days from engineering drawing approval to final testing.

A: Quality assurance is backed by full material traceability, ultrasonic testing reports for gear shafts, CMM inspection sheets, and factory test bench records (monitoring noise, vibration, and thermal performance) supplied with each shipment.

A: For smaller units (center distance up to 225 mm), splash lubrication combined with internal cooling coils is typically sufficient. For larger gearboxes (center distance >= 315 mm) or high-torque compounding extruders operating continuously under heavy loads, we integrate an external forced lubrication pump station complete with plate heat exchangers and oil filters to maintain optimal oil viscosity.

A: Yes. Our external mounting dimensions, foundation bolt hole patterns, and output shaft configurations are engineered to match mainstream global standards. Simply send your existing nameplate data or outline drawing to our engineering team for instant verification.