Case

SC 30MM Metal Plate Shearing Machine For Sale

SC 30mm metal shearing machine is a heavy-duty shearing device designed for processing thick plates, heavy sheet metal, and high-strength metal materials. It typically employs a hydraulic guillotine shearing structure, using the shearing gap created between the upper blade holder and the lower blade to perform continuous and stable linear shearing of the steel plate.

Taking common models like 30×2500mm, 30×3200mm, and 30×4000mm as examples, “30” represents the maximum rated shearing thickness of approximately 30mm, and “2500/3200/4000” represents the maximum shearing length.

Most 30mm hydraulic guillotine shearing machines on the market are designed for rated capacity based on ordinary carbon steel with a tensile strength of approximately 450MPa. If the material strength is significantly higher, such as high-strength steel or stainless steel, the actual shearable thickness needs to be reduced accordingly.

1. 30MM Metal Plate Shearing Machine Overview

30mm metal plate shearing machine is essentially a heavy-duty hydraulic sheet metal shearing device, primarily used for straight-line cutting of large-size steel plates to specified lengths, widths, or profiles.

Common models include:

30×2500mm

30×3200mm

30×4000mm

30×5000mm

30×6000mm

Longer specifications can also be customized according to project requirements.

Where:

30mm = Rated maximum shearing thickness

3200mm = Maximum shearing length per pass

For example: 30×3200mm

This means that theoretically, the equipment can perform a straight-line shear of approximately 3200mm in width for 30mm thick plates within a specified material strength range.

However, actual parameters vary significantly between different manufacturers.

For example, in publicly available specifications, the shearing speed of the 30×2500mm model is approximately 4–8 cuts/min, and the 30×3200mm model is approximately 3–5 cuts/min, with the main motor power commonly ranging from 37–45kW. Higher configurations are also available.

Therefore, when purchasing, one should not only look at the number “30mm,” but should also consider: material strength + shearing thickness + shearing length + shearing speed + blade clearance + shearing angle + back gauge accuracy.

2. 30mm Hydraulic Guillotine Shearing Machine Basic Working Principle

Its basic working process can be understood as follows:

Feeding → Positioning → Pressing → Upper blade holder descends → Plate undergoes plastic deformation → Shearing and fracture → Upper blade holder returns → Removal

1) Plate Positioning

First, the steel plate is placed on the worktable.

The shearing dimensions of the plate are determined by:

Front gauge
Side positioning
Rear gauge
Scale
CNC rear gauge

2) Pressing

The hydraulic system drives the pressing device to press the steel plate firmly.

For 30mm thick heavy steel plates, the pressing mechanism is especially important.

If the plate is not reliably pressed, the following may occur during the shearing process:

Plate movement
Non-perpendicular cut
Dimensional errors
Plate twisting
Increased burrs on the cut

3) Upper Blade Holder Descends

Hydraulic oil enters the main cylinder, causing the upper blade holder to move downwards.

The upper blade and the fixed lower blade form a shearing action.

The blade does not cut the entire 30mm steel plate at once. Instead, it uses a shearing angle to gradually advance the shearing zone.

This reduces the instantaneous shearing load.

4) Plate is Sheared

The blade first presses into the steel plate.

As the blade continues to move:

Indentation → Plastic Deformation → Crack Initiation → Crack Propagation → Plate Separation

Ultimately forming a cut.

5) Upper Blade Post Return

After shearing, the upper blade post returns quickly or in a controlled manner, preparing for the next shearing operation.

3. 30mm Shearing Machine Reference Technical Parameters

The following are reference ranges for commonly used 30mm hydraulic guillotine shearing machines on the market; they are not fixed parameters for any particular brand.

Parameter Table:

Item	30×2500	30×3200	30×4000
Maximum shearing thickness	30mm	30mm	30mm
Maximum shearing length	2500mm	3200mm	4000mm
Material tensile strength	≤450MPa	≤450MPa	≤450MPa
Shearing angle	1°-3.5°	1°-3.5°	1°-3.5°
Back gauge range	20-1000mm	20-1000mm	20-1000mm
Number of shearing cycles	4-8times/min	3-5times/min	3-5 times/min
Main motor	37～55kW	37～45kW+	45～55kW+
Blade	Multi-blade reversible	Multi-blade reversible	Multi-blade reversible
Control method	NC/CNC	NC/CNC	NC/CNC

Different manufacturers offer significantly different configurations for 30×2500, 30×3200, and 30×4000 systems. For example, publicly available data suggests a 45kW configuration for the 30×2500, while other manufacturers offer 37-40kW options for their 30×2500/3200 systems.

Therefore, the final technical agreement from the shearing machine manufacturer should be the standard for formal procurement.

4. What materials can a 30mm shearing machine cut?

This is a common point of misunderstanding during procurement.

A “30mm metal plate shearing machine” does not mean it can cut all 30mm thick metal materials.

The rated capacity of the equipment is usually related to the tensile strength of the material.

For example, ordinary low-carbon steel:

- Q235 / Ordinary carbon steel

Within the rated material strength range of the equipment, 30mm is a major processing capacity.

- High-strength steel

If the tensile strength of the material is significantly higher than the equipment’s design benchmark, the actual maximum shearing thickness must be reduced.

Some manufacturers publish data for 30×2500/3200 models, specifying a 30mm capacity for materials with a strength of approximately 450MPa and a 20mm capacity for materials with a strength of approximately 700MPa.

- Stainless steel

The shearing resistance of stainless steel such as 304 is generally higher than that of ordinary low-carbon steel.

Therefore: A 30mm shearing machine ≠ It can definitely cut 30mm thick 304 stainless steel.

If the customer primarily processes:

304
316L
High-nickel stainless steel
High-strength steel

The following should be provided before purchasing:

Material grade + Maximum thickness + Maximum width + Tensile strength

The manufacturer can then recalculate.

5. 30mm shearing machine blades

Thick plate shearing places high demands on the blades.

Common blade materials include:

6CrW2Si
Cr12MoV
H13K

Some 30×2500 models are publicly configured with Cr12MoV blades. They feature a four-flute design, allowing for flipping and reuse after the blade wears down.

Advantages of four-flute blades:

After one side wears down, it can be flipped → reused

This reduces long-term tool costs.

6. Automation Configuration of the 30mm Shearing Machine

For large-scale thick plate processing enterprises, the following can be added:

1) Front Feeding System

Suitable for:

Large-size plates
Heavy-duty plates
Mass production
Reduces manual handling.

2) Automatic Backgauge

Automatically completes dimensional positioning.

3) Plate Support Device

Used to support long, wide, and heavy plates.

4) Pneumatic Support/Pneumatic Material Handling

Reduces friction of plates on the worktable.

5) Conveying Device

Automatically conveys plates to designated areas after shearing.

6) Automatic Stacking

Further forming:

Loading → Positioning → Shearing → Conveying → Stacking

Automated production line.

7. Core Advantages of the 30mm Shearing Machine

The 30mm metal plate shearing machine is a high-rigidity, high-shearing-force hydraulic shearing solution for medium and heavy plates in the steel structure, engineering machinery, shipbuilding, pressure vessel, and heavy equipment manufacturing industries.