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Pilot Bits - Ditch Witch Pattern

5/6-bolt pattern (12mm/16mm) for Ditch Witch machines

Ditch Witch machines use their own bolt pattern family: a 5-hole 12 mm circle on the JT-series mid-size rigs and a 6-hole 16 mm pattern on the larger JT30 and up. The two are not interchangeable with each other or with Vermeer heads, so contractors running mixed fleets have to keep three bit bins on the truck. Drillworx stocks the full Ditch Witch line so one phone call covers the whole fleet.

The Ditch Witch geometry leans toward a flatter bit face than the typical Vermeer profile, which gives the sidewall more grip during steering — useful on short utility crossings with tight cover. Drillworx's extreme-taper and serrated-carbide variants push that steering authority further without sacrificing penetration rate in standard overburden.

For hard-ground work, the 5-hole 12 mm pattern has a full catalog of carbide-coverage bits that match Vermeer-pattern rock bits shot-for-shot. Expect the same mass, the same hardfacing, and the same service life in comparable formations.

Field guidance

When to use pilot bits - ditch witch pattern

JT10 and JT20 utility work

The 5-hole 12 mm pattern covers the majority of residential and commercial utility crossings — gas, water, and fiber in typical overburden.

JT30 and larger pipeline work

Step to the 6-hole 16 mm pattern for the bolt shear capacity these rigs demand. Rock-capable geometries are available on this pattern too.

Cobbly or abrasive ground

Serrated-carbide Ditch Witch bits hold up better than steel-milled teeth. Budget for more frequent carbide-cutter replacements.

Tight steering under shallow cover

Extreme-taper profiles give the sidewall a bigger bite, letting the locator crew hold line on three-foot cover crossings.

Compatibility

Fitment & sizing

5-hole pattern
12 mm bolt circle — JT-series mid-size
6-hole pattern
16 mm bolt circle — JT30 and up
Common sizes
3" – 8" OD
Hardfacing
Stelcar tungsten-carbide rope (standard)
Rock-capable variants
Roughneck, Cobble Boss, carbide-coverage

11 products

FAQ

Pilot Bits - Ditch Witch Pattern — common questions

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