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Pit Type Step Conveyor

Updated: 2026-07-18

Overview

The underground step chip conveyor is an essential component in modern manufacturing facilities, particularly in metalworking operations. This specialized equipment is designed to handle the continuous removal of metal chips, shavings, and debris generated during machining processes. Unlike above-ground conveyors, the underground version is installed beneath floor level, offering space-saving advantages and improved workplace safety. These conveyors are commonly found in CNC machining centers, automotive part production lines, and heavy industrial applications. Their step-type mechanism ensures reliable transportation of even the most challenging chip types, including long, stringy, or wet metal shavings. The underground installation provides a cleaner work environment by keeping chips contained until they reach the collection point.

Structure and Working Principle

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The conveyor consists of a series of interconnected steps or plates that move in a continuous loop within an underground trench. Each step is designed with a slight overlap to prevent material from falling through. As the steps move upward at an incline, they carry the chips to the discharge point, where they are deposited into a collection bin or further processing system. A powerful motor drives the mechanism through a chain or gear system, with variable speed controls available to match different production rates. The entire assembly is housed in a durable steel casing that protects the moving parts from contamination while allowing easy access for maintenance. Some models incorporate liquid drainage systems to handle coolant-saturated chips effectively.

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Key Features

Modern underground step chip conveyors offer several important features that enhance their performance and reliability. Heavy-duty construction using wear-resistant materials ensures long service life even in demanding industrial environments. The step design provides positive chip engagement, preventing material from sliding back down during transport. Many models include overload protection systems that automatically shut down the conveyor if excessive material accumulates. Some advanced versions feature self-cleaning mechanisms and integrated coolant recovery systems. The underground installation not only saves valuable floor space but also reduces noise levels compared to above-ground alternatives. Optional accessories may include chip compacters, magnetic separators, or centralized control interfaces for integration with automated production systems.

Application Areas

These conveyors are primarily used in metalworking industries where large volumes of chips are generated. They are particularly valuable in high-volume production environments such as automotive part manufacturing, aerospace component production, and heavy machinery fabrication. CNC machining centers benefit significantly from their continuous chip removal capability, which helps maintain consistent machining quality. The underground design makes them ideal for facilities with limited floor space or those requiring clean, unobstructed work areas. They're also used in foundries, die-casting operations, and any application where efficient chip management is critical to productivity. Some specialized versions are designed for handling specific materials like aluminum, cast iron, or exotic alloys, with customized features to address unique chip characteristics.

Maintenance and Precautions

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Proper maintenance is essential for ensuring the long-term reliability of underground step chip conveyors. Regular cleaning is necessary to prevent chip buildup that could lead to jams or excessive wear. The chain or drive mechanism should be lubricated according to the manufacturer's recommendations, and all moving parts should be inspected periodically for signs of wear. Safety precautions include ensuring all access covers are securely in place during operation and that emergency stop mechanisms are functional. When performing maintenance, the system should be completely shut down and locked out to prevent accidental activation. The trench should be kept clear of liquids that could damage electrical components, and any accumulated coolant should be drained regularly. It's also important to monitor for unusual noises or vibrations that might indicate developing problems.

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B2B Procurement Guide

When procuring underground step chip conveyors, several factors should be carefully considered. First, evaluate the volume and type of chips your operations generate - this will determine the required capacity and specific design features. Consider the available installation space, including depth requirements, as these systems typically need significant underground clearance. Look for manufacturers with proven experience in your specific industry segment, as they'll better understand your application challenges. Request detailed specifications about construction materials, motor power, and control options. Consider long-term maintenance requirements and availability of spare parts. For reference, prices typically range from approximately $2,000 for small units to $8,000 or more for large, heavy-duty systems with advanced features. Always compare warranty terms and after-sales support when making purchasing decisions.

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