INTERNAL MACHINING - DONTYNE GEARS

In 2025, the British Gear Association (BGA) are funding a Research Project on “Internal Gear Machining.” with BGA member Dontyne Gears.

Objectives:

The objective of this proposal is to explore the feasibility and viability of machining internal gears on a 5-axis milling machine. Areas such as tool access, tool wear, surface finish and tooth form will be evaluated and compared to external gear cutting on a 5-axis machine.

• Explore tool access on high helix angle internal gears to find the limit on helix angle possible to cut

• Explore extent of quality that can be produced by cutting internal gears on a 5-axis machine compared to external gears

• Explore the tool life when cutting internal gears compared to external gears

• Explore a range of cutting passes per flank/fillet and measure the effect it has on surface finish

• Establish data flow between design, manufacture and inspection for a complete system in house

Benefit to Members:

• Written report including proposal for further work items

• Additional content to be provided to BGA members for benchmarking

  • 90-day trial for GPS for relevant modules used in the project

  • All CAD models will be made available

  • All GPS design files will be made available

  • All G-code will be made available

Stage 1 Update:

BGA Internal Machining - Stage 1 update.pdf

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