Carbide-Tipped Form Milling Cutter for Solenoid Valve Cores – 2× Tool Life
Aoshiji® Custom Tool developed a custom carbide-tipped form milling cutter for machining 1.4112 stainless steel solenoid valve cores on a Schütte SG18 machine.
The original process experienced end-face quality problems and achieved approximately 15,000 parts per tool. The Aoshiji cutter uses carbide cutting sections brazed to a steel tool body, a reverse form geometry, controlled edge preparation and a profile designed specifically for the valve-core machining operation.
Under the same cutting speed and spindle speed, the optimized tool achieved approximately 30,000 parts per tool — twice the previous tool life — while meeting the required end-face condition and surface-quality requirements.
Case Result: 15,000 → 30,000 parts per tool
Workpiece: Solenoid valve core
Material: 1.4112 stainless steel
Tool: Custom carbide-tipped form milling cutter
Machine: Schütte SG18
For a broader explanation of carbide-tipped and brazed carbide tool construction, see our main product guide: Custom Carbide-Tipped Cutting Tools.
Table of Contents
- Application Results at a Glance
- Solenoid Valve Core Machining Requirements
- Problem with the Previous Machining Process
- Aoshiji Carbide-Tipped Form Milling Cutter Solution
- Reverse Form Geometry for End-Face Machining and Deburring
- Carbide Cutting Edge and Edge Preparation
- Cutting Parameters and Tool-Life Comparison
- Machining Result: Tool Life Increased from 15,000 to 30,000 Parts
- Why a Carbide-Tipped Form Milling Cutter Was Suitable for This Application
- Carbide-Tipped vs Brazed Carbide: Which Term Is Correct?
- Where Similar Custom Form Milling Cutters Are Used
- Information Required for a Similar Custom Tool
- Frequently Asked Questions
- Need a Carbide-Tipped Form Milling Cutter for a Similar Application?
- Related Technical Pages
01 Application Results at a Glance
| Item | Application Data |
|---|---|
| Component | Solenoid valve core |
| Workpiece Material | 1.4112 stainless steel |
| Machine | Schütte SG18 |
| Coolant | External coolant |
| Tool Type | Custom carbide-tipped form milling cutter |
| Tool Construction | Brazed carbide cutting sections on steel body |
| Original Tool Life | Approx. 15,000 parts |
| Aoshiji Tool Life | Approx. 30,000 parts |
| Tool-Life Improvement | 2× |
| Cutting Speed | 132 m/min |
| Spindle Speed | 3,500 rpm |
| Surface Requirement | Pt < 16 |
| Additional Requirement | No raised center point or visible end-face irregularities |
02 Solenoid Valve Core Machining Requirements
The component in this application is a solenoid valve core manufactured from 1.4112 stainless steel.
The customer required stable high-volume production with particular attention to the machined end face. The finished component could not have a raised center point, visible surface irregularities or an unacceptable surface profile.
The machining requirements included:
- Stable end-face form
- Pt below the customer-specified limit of 16
- No raised material at the center
- No visible uneven areas on the machined face
- Repeatable quality over a long production run
- Tool life of at least 15,000 parts
The operation was performed on a Schütte SG18 using external coolant.
03 Problem with the Previous Machining Process
The previous machining method used a cut-off tool to machine the end face.
Two recurring problems affected production.
Raised Center Material
The original process could leave a small center tip or raised point on the end face. This meant that the complete functional surface was not generated cleanly in a single stable cutting action.
Unstable End-Face Quality
The customer also experienced cases where the required surface condition could not be maintained consistently.
For a high-volume valve component, this creates more than a cosmetic issue. An inconsistent end face can increase inspection requirements, create additional correction work and increase the risk of rejected parts.
The tooling solution therefore needed to address both geometry and surface generation, rather than simply replacing the existing cutter with a similar tool.
04 Aoshiji Carbide-Tipped Form Milling Cutter Solution
Aoshiji designed a custom carbide-tipped form milling cutter specifically around the customer’s valve-core geometry and machining sequence.
The cutter uses cemented-carbide cutting sections supported by a steel tool body. The carbide sections are permanently joined to the body through a controlled brazing process.
This is why the same tool can technically be described as a brazed carbide form milling cutter.
However:
- Carbide-tipped describes the tool construction
- Brazed carbide describes how the carbide is joined to the body
- Form milling cutter describes the actual cutting-tool category
For this reason, Aoshiji uses carbide-tipped form milling cutter as the primary product terminology while retaining brazed carbide where the manufacturing process needs to be explained.
05 Reverse Form Geometry for End-Face Machining and Deburring
The tool incorporates a reverse form milling geometry developed to machine the required end-face profile while removing peripheral burrs during the same operation.
Instead of treating facing and burr removal as unrelated processes, the cutter profile is designed around the finished component geometry.
This approach helps:
- Generate the required end-face form
- Eliminate the unwanted center projection
- Remove peripheral burrs
- Maintain the relationship between machined features
- Reduce dependence on secondary correction
- Improve repeatability during high-volume production
A dedicated form cutter is particularly useful when several geometrically related surfaces must be produced consistently during the same machining operation.
06 Carbide Cutting Edge and Edge Preparation
Carbide was selected for the functional cutting sections because the application required sustained wear resistance over a long production run.
The carbide-tipped construction also allows the cutting geometry and steel body to be designed independently around the application.
For this cutter, Aoshiji applied controlled cutting-edge preparation and post-treatment to support:
- Stable cutting-edge condition
- Consistent surface generation
- Reduced localized edge damage
- Predictable wear development
- Long production life
The objective was not simply to make the cutting edge as sharp as possible.
Edge preparation must balance sharpness, edge strength, workpiece material, engagement and the required surface condition.
07 Cutting Parameters and Tool-Life Comparison
| Parameter | Previous Tool | Aoshiji Carbide-Tipped Form Milling Cutter |
|---|---|---|
| Tool Size | D12 / 10 × 10; L38 | D12 / 10 × 10; L38 |
| Cutting Speed (Vc) | 132 m/min | 132 m/min |
| Spindle Speed | 3,500 rpm | 3,500 rpm |
| Feed Setting | Customer cam-machine setting | Same setting |
| Tool Life | Approx. 15,000 pcs | Approx. 30,000 pcs |
| Improvement | — | 2× tool life |
08 Machining Result: Tool Life Increased from 15,000 to 30,000 Parts
The final carbide-tipped form milling cutter achieved approximately 30,000 machined components, compared with approximately 15,000 components for the previous tool.
This represents:
2× Tool Life
Importantly, the improvement was achieved without increasing the specified cutting speed or spindle speed.
The machining solution also addressed the original end-face problems by integrating the required form generation and deburring action into the cutter geometry.
For the customer, the improvement meant:
- Fewer tool changes
- Longer uninterrupted production runs
- More stable end-face machining
- Reduced risk of unacceptable center projections
- More predictable tooling consumption
- Lower tooling cost per finished component
09 Why a Carbide-Tipped Form Milling Cutter Was Suitable for This Application
This application required more than a conventional end mill.
A drawing-specific form cutter was appropriate because the tool needed to control several related conditions during one machining operation.
The carbide-tipped design provided:
Drawing-Specific Cutting Geometry
The cutting profile could be designed specifically around the valve-core end face rather than being limited by a standard catalog geometry.
Carbide Wear Resistance
Only the functional cutting areas require cemented carbide, allowing the tool to combine carbide cutting performance with a supported steel body.
Brazed Construction
The carbide cutting sections are brazed to the steel body, making complex custom geometries practical while retaining the possibility of regrinding where the tool design allows.
Process Integration
The cutter can generate the required form and address burr formation as part of the same engineered machining strategy.
This is particularly valuable in repetitive production where the same geometry must be reproduced across thousands of parts.
10 Carbide-Tipped vs Brazed Carbide: Which Term Is Correct?
Both terms can be correct for this type of cutter, but they describe different characteristics.
A carbide-tipped form milling cutter has cemented-carbide cutting sections supported by a separate tool body.
A brazed carbide form milling cutter describes a carbide-tipped tool in which those carbide sections are permanently joined to the body using brazing.
Therefore, in this case:
Carbide-tipped = product construction
Brazed carbide = manufacturing method
For buyers searching for the tool itself, carbide-tipped form milling cutter is the primary terminology used on this page.
11 Where Similar Custom Form Milling Cutters Are Used
A similar custom carbide-tipped form milling cutter can be evaluated for applications involving:
- Solenoid valve components
- Automotive valve components
- Stainless steel precision components
- Drawing-specific end faces
- Combined radius and angle profiles
- Stepped profiles
- Profile grooves
- Simultaneous form machining and deburring
- Repetitive high-volume production
- Components where standard end mills require excessive toolpaths
The actual tool geometry, carbide grade, edge preparation and cutting conditions must be selected from the component drawing and machining process.
12 Information Required for a Similar Custom Tool
For a new carbide-tipped form milling cutter, Aoshiji normally evaluates the application from the component drawing and machining requirements.
Please provide:
- Component drawing or tool drawing
- Workpiece material and hardness
- Required finished profile
- Profile tolerances
- Surface-finish requirement
- Existing machining process
- Machine tool and interface
- Coolant method
- RPM and cutting speed
- Feed
- Stock allowance
- Current tool-life problem
- Required production quantity
- Existing tool sample or drawing, if available
Aoshiji can then evaluate the cutter profile, carbide support, brazing structure, edge geometry and regrinding requirements.
13 Frequently Asked Questions
What is a carbide-tipped form milling cutter?
A carbide-tipped form milling cutter is a dedicated profile milling tool with cemented-carbide cutting sections supported by a separate tool body. The cutting edges are ground to generate a drawing-specific profile such as a radius, taper, step, groove or combined form.
Are carbide-tipped and brazed carbide form milling cutters the same?
They can describe the same basic tool construction. “Carbide-tipped” describes the carbide cutting sections supported by the tool body, while “brazed carbide” describes the brazing process used to permanently join those carbide sections to the body.
Why was a form milling cutter used for the solenoid valve core?
The valve-core application required controlled end-face geometry, removal of a raised center point and peripheral burr control. A dedicated form cutter allowed these requirements to be addressed through one application-specific cutting profile rather than relying on a standard cutter geometry.
Can a carbide-tipped form milling cutter machine stainless steel?
Yes, when the carbide grade, cutting geometry, edge preparation and cutting conditions are selected for the specific stainless steel and machining operation. In this case, the cutter was used on 1.4112 stainless steel.
How much tool life was achieved in this case?
The previous tool produced approximately 15,000 components. The Aoshiji carbide-tipped form milling cutter produced approximately 30,000 components under the documented application conditions, representing approximately 2× tool life.
What information is needed to quote a custom form milling cutter?
A component or tool drawing is preferred. Workpiece material, tolerance, surface finish, stock allowance, machine information, coolant, cutting parameters, current tool life and required production volume are also important for the engineering review.
14 Need a Carbide-Tipped Form Milling Cutter for a Similar Application?
Aoshiji® Custom Tool manufactures drawing-specific carbide-tipped and brazed carbide cutting tools for non-standard industrial machining applications.
Send us your:
Component drawing → Material → Tolerances → Machine → Cutting conditions → Current tooling problem
Our engineering team can evaluate the cutter profile, carbide construction and machining strategy for your application.
15 Related Technical Pages
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Profile milling cutters for formed surfaces, bearing components, grooves and special contour machining.
Flat-bottom, stepped, guided and profile counterbores for precision recess machining.
Custom side and face cutters for slotting, grooving, shoulder milling and stepped-slot machining.
Custom industrial drills for metal machining, including step drills, form drills and combination tools.
Step, taper, form and internal-coolant reamers designed for precision hole finishing.
Made-to-drawing form tools for profiles, radii, steps, tapers, grooves and combined features.
Overview of custom carbide-tipped cutting tools for turning, drilling, reaming, milling, counterboring and profile machining.
Compare brazed carbide, solid carbide and indexable tools by rigidity, profile flexibility, tool life, cost and production volume.
