85 Series C Station SQ24 Square Thick Turret Tooling Set
The 85 Series C Station SQ24 Square Thick Turret Tooling Set is designed for producing precise 24 × 24 mm square holes. Supplied as a complete matched set with the upper punch assembly and corresponding lower die, it features an M2 high-speed steel punch, a DC53 tool steel die and HRC 58–60 working hardness. The die opening and cutting clearance can be customized according to the customer’s sheet material, thickness and required edge quality.
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Description
The 85 Series C Station SQ24 Square Thick Turret Tooling Set is engineered for accurate and repeatable punching of nominal 24 × 24 mm square holes on compatible CNC thick turret punch presses.
In the designation “SQ24,” “SQ” identifies the square punching profile and “24” represents the nominal 24 mm side length. The tool is larger than the previously introduced A Station SQ7 tooling and B Station SQ14 die, providing a dedicated C Station solution for medium-size square openings.
This product is supplied as a complete matched tooling set rather than an individual replacement component. It consists of the upper punch assembly and the corresponding lower die required for punching operation.
The punch is manufactured from M2 high-speed steel, while the matching lower die is manufactured from DC53 tool steel. The working components are heat-treated to HRC 58–60 to provide cutting-edge hardness, toughness, compressive strength and dimensional stability.
Square punches concentrate greater stress at their four corners than round tools. Accurate corner geometry, consistent punch-to-die alignment and suitable cutting clearance are therefore essential for maintaining hole accuracy and preventing premature chipping.
The actual lower-die opening is manufactured according to the customer’s sheet material and thickness. WYS Machinery can customize the total cutting clearance, punch-tip geometry, coating and tooling configuration based on the finished-part drawing and punch press information.
Key Features
- 85 Series thick turret tooling configuration
- C Station square punching tool
- SQ24 shape designation
- Nominal punching size of 24 × 24 mm
- Complete upper punch assembly and matching die
- M2 high-speed steel punch
- DC53 tool steel die
- Working hardness of HRC 58–60
- Precision-ground square cutting edges
- Accurate corner geometry
- Customized die clearance for different materials and thicknesses
- Optional TiN or TiCN coating
- Custom punch-tip and shear geometry
- Replacement punch and die available separately
- Free tooling design support based on customer drawings
Technical Specifications
| Specification | Details |
|---|---|
| Tool Category | Thick Turret Punch Tooling |
| Product Type | Complete Punch and Die Tooling Set |
| Series | 85 Series |
| Station | C Station |
| Profile | Square |
| Shape Designation | SQ24 |
| Nominal Punching Size | 24 × 24 mm |
| Nominal Profile Area | 576 mm² |
| Cutting Perimeter | 96 mm |
| Upper Tool | Complete Punch Assembly |
| Lower Tool | Matching Square Die |
| Punch Material | M2 High-Speed Steel |
| Die Material | DC53 Tool Steel |
| Working Hardness | HRC 58–60 |
| Cutting Edges | Precision Ground |
| Optional Coating | TiN or TiCN |
| Applicable Materials | Mild Steel, Stainless Steel, Aluminum and Other Sheet Metals |
| Die Clearance | Customized According to Sheet Material and Thickness |
| Machine Tonnage | Verified According to the Application |
| Customization | Size, Clearance, Tip Geometry, Coating and Assembly Configuration |
Complete Tooling Set Configuration
| Component | Supply Scope |
|---|---|
| SQ24 Square Punch | Included |
| Punch Guide | Included in the upper assembly |
| Stripper | Included in the upper assembly |
| Spring and Adjustment Components | Included according to assembly design |
| Matching SQ24 Lower Die | Included |
| Replacement Punch | Available separately |
| Replacement Die | Available separately |
| Other Wear Components | Available according to tooling configuration |
The exact upper-assembly structure can be adapted according to the customer’s machine model and existing tooling system.
SQ24 Profile and Customized Die Clearance
SQ24 identifies the nominal 24 × 24 mm punching profile. It does not mean that the lower-die opening is manufactured to exactly 24 × 24 mm.
The actual die opening must include the selected cutting clearance:
| Item | Description |
|---|---|
| Nominal Punching Profile | 24 × 24 mm square |
| Matching Die Opening | Punch dimensions plus selected total clearance |
| Clearance Selection | Based on material, thickness and tensile strength |
| Finished Die Dimensions | Confirmed during tooling engineering |
The die clearance can be customized for:
- Mild steel
- Stainless steel
- Aluminum
- Galvanized sheet
- Copper and other suitable sheet materials
- Different material thicknesses
- Different burr and edge-quality requirements
Correct clearance helps:
- Produce cleaner square holes
- Control burr height
- Reduce punching force
- Improve slug separation
- Reduce stripping resistance
- Protect the four punch corners
- Prevent premature die-corner chipping
- Maintain consistent hole dimensions
- Extend punch and die service life
Square-Corner Performance
The four corners of an SQ24 punch experience higher localized stress than the cutting edge of a round punch.
For stable production, the tooling must maintain:
- Accurate punch and die alignment
- Uniform clearance on all four sides
- Correct square-corner geometry
- Suitable material lubrication
- Stable stripping conditions
- Timely cutting-edge inspection
- Correct machine setup
Uneven clearance can cause one side or corner to enter the material before the others, increasing the risk of burr variation, uneven wear and corner damage.
Punching Force and Machine Verification
The SQ24 profile has a nominal cutting perimeter of 96 mm. Required punching force depends on:
- Cutting perimeter
- Sheet thickness
- Material shear strength
- Punch-to-die clearance
- Punch-tip geometry
- Machine condition
- Lubrication
Machine tonnage should be checked before production, especially when punching stainless steel, high-strength sheet or thicker materials.
A suitable shear-tip design may reduce peak punching force by allowing the cutting edges to enter the sheet progressively. The required tip geometry should be confirmed according to the material, thickness and finished-part requirements.
Typical Hits Before Regrinding
| Sheet Material | Approximate Hits Before Regrinding |
|---|---|
| Stainless Steel | Approximately 300,000 hits |
| Mild Steel | Approximately 500,000 hits |
These values are typical references rather than guaranteed limits. Actual regrinding intervals depend on material thickness, tensile strength, cutting clearance, coating, lubrication, machine alignment, punching speed and maintenance.
The four corners should be inspected regularly. Regrinding is recommended before excessive corner rounding, chipping or burr growth develops.
Typical Tool Service Life
| Tool Profile | Approximate Total Service Life |
|---|---|
| Round Tooling | Approximately 800,000 hits |
| Shaped Tooling | Approximately 600,000–700,000 hits |
| SQ24 Square Tooling | Refer to the Shaped Tooling Range |
SQ24 is classified as shaped tooling. Correct die clearance and accurate alignment are especially important for achieving the expected service-life range.
Optional TiN and TiCN Coatings
TiN Coating
TiN provides a hard, low-friction surface that helps reduce adhesive wear and material buildup. It is a practical option for many general-purpose punching applications.
TiCN Coating
TiCN provides higher hardness and improved resistance to abrasive and adhesive wear. It is particularly useful when punching stainless steel, higher-strength materials or high production volumes.
The coating should be selected according to the sheet material, thickness, punching frequency and required tooling performance.
Typical Applications
The SQ24 C Station square tooling set is suitable for producing square openings in:
- Electrical cabinets and control enclosures
- Switchgear and power-distribution equipment
- Electronic equipment housings
- Sheet metal panels and covers
- HVAC and ventilation components
- Machinery guards
- Metal furniture and storage systems
- Automotive sheet metal parts
- Appliance panels
- Mounting plates and brackets
- General precision sheet metal fabrication
Typical hole functions include:
- Square fastener openings
- Anti-rotation mounting features
- Electrical component cutouts
- Connector and control-panel openings
- Cable-routing features
- Locating and positioning holes
- Assembly interfaces
- Ventilation layouts
- Functional square openings
Manufacturing Quality
The SQ24 punch and die are manufactured as a matched set using selected tool steels, controlled heat treatment and precision machining.
Quality control focuses on:
- Accuracy of the 24 × 24 mm punch profile
- Parallelism of opposite cutting edges
- Squareness of adjacent edges
- Corner geometry
- Punch and die alignment
- Cutting-clearance consistency
- Punch-tip surface finish
- Die-opening dimensions
- Upper-assembly concentricity
- Heat-treatment consistency
Precision manufacturing helps produce square holes with consistent dimensions while reducing uneven wear, burr variation and premature corner failure.
Tool Maintenance and Regrinding
The tooling should be inspected regularly for:
- Cutting-edge rounding
- Corner chipping
- Uneven wear
- Material buildup
- Increased burr height
- Excessive stripping force
- Punch and die misalignment
- Guide or stripper wear
Timely light regrinding removes less material and helps preserve the total usable tool length.
After regrinding, the punch length, assembly settings and tool height should be checked before returning the tooling to production.
Standard and Custom Thick Turret Punch Tooling
WYS Machinery supplies complete tooling sets and individual replacement components for round, square, rectangular, obround and special-shaped punching applications.
Customers can provide:
- Punch press manufacturer and model
- Tooling series and station size
- Required hole dimensions
- Sheet material
- Material thickness
- Material tensile strength
- Required edge quality
- Machine tonnage
- Coating requirements
- Finished-part drawings
Available customization options include:
- Custom square dimensions
- Material-specific die clearance
- Flat or sheared punch tips
- TiN and TiCN coatings
- Complete punch assemblies
- Matching lower dies
- Replacement punches
- Replacement dies
- Punch guides and strippers
- Special-shaped tooling
- Tooling designed from customer drawings
- OEM and private-label manufacturing
Custom Forming Tool Capabilities
WYS Machinery can also design and manufacture:
- Cluster Tools
- Knockout Tools
- Embossing Tools
- Extrusion Forming Tools
- Extrusion and Tapping Tools
- Bridge Forming Tools
- Pedestal Extrusion and Embossing Tools
- Louver Forming Tools
- Multi-Scribe Tools
- Sheet Marking Tools
- Lance-and-Form Tools
- Progressive Rib Tools
- Up-Bending Tools
- Hinge Tools
- Rolling Pincher Tools
- Rolling Shear Tools
- Rolling Rib Tools
- Rolling Offset Tools
Custom tooling can be developed according to the finished-part drawing, sheet material, thickness, forming requirements, station size and punch press configuration.
