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  • Writer's pictureNaoki Shibata

Securing Sufficient Pilot Hole Length for Threading

Updated: Jun 1, 2022

When there are Lathe parts such as Rollers, Pistons or Valves that require Threading inside Boring hole, Special cutting tools are necessary for drilling to prevent from broken cutting tools if Pilot hole length is not long enough than thread length(Y)as the upper picture, which increases lathing costs.

Short Pilot Hole Length
Short Pilot Hole Length

If Pilot hole length is long enough as the bottom picture, then ordinal cutting tools can be used that leads cost reduction.

Long Pilot Hole Length
Long Pilot Hole Length

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