STK-90NC Semi-Automatic Circular Saw for Metal Bar Cutting

Precision Metal Cutting with Servo-Controlled Feeding

The STK-90NC Semi-Automatic Circular Saw Machine is configured for cutting metal bars and compatible profiles into specified lengths. It combines a servo-driven cutting feed, hydraulic workpiece clamping, a TCT circular saw blade, and programmable material feeding to support repeatable industrial cutting operations.

The machine uses a horizontal push-feed mechanism to move the cutting head along rigid guideways. This arrangement is designed to maintain stable saw-blade movement during cutting.

Its enclosed cutting structure and material-handling equipment make it suitable for production environments where consistent cut length, controlled clamping, and efficient handling are important.

Main Cutting System

The STK-90NC uses a 315 mm TCT circular saw blade driven by a 7.5 kW main motor.

The documented blade-speed range is 30–168 rpm, allowing cutting parameters to be adjusted according to the workpiece material and blade requirements.

A servo motor, precision ball screw, and rigid linear guides control cutting-head movement.

This configuration is intended to reduce uncontrolled blade engagement and support stable cutting.

Hydraulic Clamping

The machine includes horizontal and vertical hydraulic clamping arrangements.

These mechanisms secure the workpiece before and during the cutting operation.

Appropriate clamping force helps reduce material movement and supports consistent cut geometry.

Material Feeding

The material feeding system uses an AC servo motor and precision ball screw.

The specified single-feed travel is 30–850 mm, with multiple feeding cycles available for longer cutting lengths.

An automatic counting function allows the system to stop after reaching a preset production quantity.

STK-90NC Technical Specifications

The listed values are taken from the technical specifications. Actual cutting results depend on material properties, blade selection, tooling, and operating conditions.

Applications in Industrial Manufacturing

Automotive Components

Automotive component production often requires metal bars to be cut into blanks before turning, drilling, milling, or other machining operations.

The STK-90NC can support material preparation for suitable shafts, pins, bushings, and machined components.

Machinery Manufacturing

Machinery manufacturers process steel bars and profiles for mechanical parts.

Servo-controlled feeding helps position materials for repeated cutting operations, particularly when batches require consistent nominal lengths.

Hydraulic Equipment

Metal blanks used in hydraulic fittings, valve components, and related assemblies may require controlled cutting before precision machining.

Suitable cutting capacity and material compatibility must be confirmed for each workpiece.

General Metalworking

The machine can also support bar-stock preparation in industrial metalworking workshops.

Its feeding and cutting arrangement is relevant to production environments that process repeated batches of similar components.

Material Handling and Supporting Systems

The STK-90NC technical configuration includes several supporting functions:

Spray lubrication: Applies cutting fluid to the saw blade to help manage friction and heat.

Automatic lubrication: Supplies lubricant to selected mechanical transmission components at configured intervals.

Chip conveyor: Transfers chips away from the cutting area.

Material sorting: Separates finished pieces from starting and remaining stock sections.

Oil-mist collection: Available as an optional system, subject to the selected configuration.

These functions support routine cutting operations and maintenance.

Cutting Accuracy and Quality Control

The technical document specifies material feeding accuracy of ±0.05 mm and a cutting-length tolerance of ±0.20 mm under the stated equipment specification.

However, the finished result must be assessed using the actual production material.

Important inspection items include cut length, end-face perpendicularity, burr condition, and surface quality.

Blade condition, material hardness, clamping stability, and cutting parameters can all influence these results.

Supporting Repeatable Production

The STK-90NC combines a rigid cast-iron base, controlled cutting movement, and hydraulic clamping within an enclosed machine structure.

For manufacturers cutting metal bars into machining blanks, the equipment offers a programmable method for material feeding and cutting.

Before selecting the machine for production, buyers should confirm the required material dimensions, material grade, cutting tolerance, and target output.

Sample cutting tests remain the most reliable way to evaluate suitability for a particular component.