Description
YG-1 GMF15018 4G Mill 2 Flute 30 Degree Helix Ball Nose End Mill 9/32 x 5/16 x 9/16 x 3-1/2
L. Dewitt's SKU #: GMF15018 | Mfr Part #: GMF15018High-speed mold and die milling leaves little room for vague tooling data. The wrong end mill can create chatter, poor surface finish, missed tolerance, edge wear, and rework in pre-hardened steel jobs. YG-1 4G Mill end mills help maintenance teams, CNC programmers, and industrial buyers select a high-speed carbide tool for pre-hardened steels up to HRc 55, mold and die work, dry or wet cutting, close-tolerance applications, and finish-critical machining.
- Mold and die teams machining pre-hardened steels, detailed cavities, ribs, profiles, and close-tolerance features.
- CNC programmers and machinists matching ball nose, corner radius, square end, rib, necked, long, and multiple-helix geometry to the programmed toolpath.
- Maintenance and tooling managers replacing 4G Mill tools by EDP, coating, flute count, geometry, reach, and exact dimensions.
- Industrial buyers comparing inch and metric 4G variants before checkout with enough practical detail to avoid wrong-tool orders.
GMF15018: YG-1 4G Mill 2 flute ball nose solid carbide end mill with YG-1 Special Tailored Coating. Use this model when the operation calls for profiling, contouring, and surface finishing where a ball nose profile is required and the listed dimensions match the holder, workpiece, reach requirement, and cutting conditions.
Why This Model
Use this 4G Mill model when the job requires a high-speed solid carbide end mill for pre-hardened steels up to HRc 55, mold and die work, dry or wet cutting, close-tolerance applications, or finish-critical machining. The selection decision should be based on cutting edge shape, flute count, helix angle, reach, cutting diameter, shank diameter, length of cut, and overall length before the tool is added to the job.
Technical Specifications
| Brand | YG-1 |
| Product Family | 4G Mill |
| Tool Type | High-speed solid carbide end mill |
| Tool Style | Ball Nose |
| Cutting Edge Shape | Ball Nose |
| Flutes | 2 Flute |
| Helix Angle | 30 Degree |
| Coating | YG-1 Special Tailored Coating |
| Manufacturer Part Number | GMF15018 |
| Measurement System | Inch |
| Cutting Diameter | 9/32 |
| Ball Radius | 0.140625 |
| Shank Diameter | 5/16 |
| Length of Cut | 9/16 |
| Overall Length | 3-1/2 |
| Size | 9/32 x 5/16 x 9/16 x 3-1/2 |
What This Solves
- Better mold-and-die tooling decisions. Geometry, coating, reach, and edge style are visible so programmers can match the tool to the operation.
- Faster replacement matching. EDP, dimensions, flute count, coating, helix, and tool style are structured for repeat ordering.
- Reduced wrong-tool risk. Selection checks help buyers confirm holder fit, reach, material, machine rigidity, coolant strategy, and cutting setup before checkout.
- More practical finish planning. The description connects the product to dry or wet cutting, close tolerance, surface finish, rib processing, profiling, contouring, and necked-reach work.
Common Applications
- Pre-hardened steels up to HRc 55, mold steels, die steels, alloy steels, tool steels, and compatible high-speed milling applications
- 3D contouring, profiling, surface finishing, mold cavities, die details, and ball-nose finishing work
- Mold and die work, close-tolerance features, dry or wet cutting, surface finishing, profiling, and detail machining
- Maintenance replacement when an existing YG-1 4G Mill EDP or geometry must be matched
Quick Answer
YG-1 GMF15018 4G Mill 2 Flute 30 Degree Helix Ball Nose End Mill 9/32 x 5/16 x 9/16 x 3-1/2 is a YG-1 4G Mill ball nose solid carbide end mill with YG-1 Special Tailored Coating for high-speed mold and die machining, pre-hardened steels up to HRc 55, dry or wet cutting, and close-tolerance applications.
- Product Family: 4G Mill
- Tool Style: Ball Nose
- Cutting Edge Shape: Ball Nose
- Flutes: 2 Flute
- Helix Angle: 30 Degree
- Coating: YG-1 Special Tailored Coating
- Manufacturer Part Number: GMF15018
- Measurement System: Inch
- Cutting Diameter: 9/32
- Ball Radius: 0.140625
- Shank Diameter: 5/16
- Length of Cut: 9/16
- Overall Length: 3-1/2
Common Questions
What is the YG-1 GMF15018?
GMF15018 is a 4G Mill ball nose solid carbide end mill for high-speed mold and die machining, pre-hardened steels up to HRc 55, dry or wet cutting, and close-tolerance applications.
What materials use 4G Mill end mills?
4G Mill tools are selected for pre-hardened steels up to HRc 55, mold steels, die steels, alloy steels, tool steels, and compatible close-tolerance milling work when the selected geometry and cutting parameters match the job.
How do I confirm the correct replacement?
Match the EDP GMF15018, tool style, flute count, cutting edge shape, cutting diameter, shank diameter, neck or reach details, length of cut, and overall length against the existing tool or programmed job requirements.
How should this end mill be used?
Use it in a rigid setup with the correct holder, dry or wet cutting strategy, work material, toolpath, chip evacuation plan, and cutting parameters for the selected 4G Mill geometry.
What results should this product support?
When selected correctly, this 4G Mill end mill supports a cleaner tooling workflow: faster SKU matching, clearer setup checks, fewer wrong-tool decisions, and more confidence before the tool is ordered or replaced.
Image reference: YG-1 4G Mill end mill GMF15018.
Need Help Matching a 4G Mill End Mill?
Send us the EDP, current tool marking, dimensions, work material, machine setup, or application details. L. Dewitt McCarter, Inc. can help verify the correct YG-1 replacement for your mold and die or pre-hardened steel milling setup.
Contact Our Technical TeamAdditional Information
Manufacturer: |
YG-1 |
Manufacturer Part Number: |
GMF15018 |
Product Family: |
4G Mill |
Tool Category: |
High Performance End Mill |
Application Family: |
Pre-hardened steels up to HRc 55, mold and die, close-tolerance work |
Tool Style: |
Ball Nose |
Cutting Edge Shape: |
Ball Nose |
Flutes: |
2 Flute |
Helix Angle: |
30 Degree |
Coating: |
YG-1 Special Tailored Coating |
Package Unit: |
1 |
Size: |
9/32 x 5/16 x 9/16 x 3-1/2 |
Measurement System: |
Inch |
Cutting Diameter: |
9/32 |
Shank Diameter: |
5/16 |
Length of Cut: |
9/16 |
Overall Length: |
3-1/2 |
Ball Radius: |
0.140625 |
