CNC Machining

CNC-Turned Centering Cone from Tool Steel — Precision Tooling

Q: Do you machine hardened steel above 50 HRC?

Yes, we machine hardened steels up to 62 HRC. For materials above 50 HRC, we use precision grinding instead of cutting. We have cylindrical, internal, and surface grinding machines.

Q: What quality control do you use for precision components?

Precision components are measured on a coordinate measuring machine (CMM) with 0.001 mm accuracy. We also use profile projectors for contour verification and surface roughness testers for finish verification.

Q: Do you handle framework orders with scheduled deliveries?

Yes, we offer framework agreements with delivery schedules tailored to the client. This approach optimizes tooling costs and reduces individual delivery times to 3-5 business days.

Centering cone machined on CNC turning center from NC6 tool steel. Cone ground with ±2' angle accuracy and Ra 0.2 μm surface finish.

CNC-Turned Centering Cone from Tool Steel — Precision Tooling

Technical Specifications

Material: NC6 tool steel (58 HRC)
Cone angle: 60° ±2'
Radial runout: < 0.005 mm (achieved 0.003 mm)
Surface finish: Ra 0.2 μm
Hardness: 58 HRC
Batch size: 20 pieces
Inspection: CMM (coordinate measuring)
Lead time: 10 business days

Challenge

A special-purpose machine manufacturer needed centering cones for CNC lathe tooling. The components had to ensure workpiece centering repeatability with runout below 0.005 mm. A batch of 20 pieces with full interchangeability between workstations was required.

TMT Solution

We machined the cones from NC6 tool steel hardened to 58 HRC. Rough turning on CNC lathe, followed by cone grinding on an internal grinder with angle verification on a profile projector. Each cone underwent CMM measurement before batch acceptance.

Result

The entire batch of 20 pieces achieved runout tolerance of 0.003 mm — below the required threshold. The client confirmed full interchangeability between workstations and placed a framework order for 60 additional pieces over the year.

Related service: CNC Machining →

Frequently Asked Questions

Do you machine hardened steel above 50 HRC?

Yes, we machine hardened steels up to 62 HRC. For materials above 50 HRC, we use precision grinding instead of cutting. We have cylindrical, internal, and surface grinding machines.

What quality control do you use for precision components?

Precision components are measured on a coordinate measuring machine (CMM) with 0.001 mm accuracy. We also use profile projectors for contour verification and surface roughness testers for finish verification.

Do you handle framework orders with scheduled deliveries?

Yes, we offer framework agreements with delivery schedules tailored to the client. This approach optimizes tooling costs and reduces individual delivery times to 3-5 business days.

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