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Thread MillMade in USA

THR-3

Thread Mill made from Solid Carbide for Inch and Metric Threads

Thread Mill #3, 0.072 Dia, 1 Flute, 0.160 Neck Len, 0.1875 Shank, 2.0 OAL

Thread Mill made from Solid Carbide for Inch and Metric Threads — THR-3
Series photo — representative of the THR family
Ø0.04″ neckOAL 2″Neck 0.16″Shank Ø0.1875″Cutter Ø0.072″60° incl. thread form · crest 0.001″Blend 45°
Scaled drawing — true to this tool's dimensions (inch)
Speeds & FeedsDialed to this exact tool — free
Free CAD & DataSTEP 3DDXF 2DISO CSVCAM library
RobbJack THR solid carbide single-profile thread mill cutting internal threads, shown in cutaway of a threaded hole

One solid carbide thread mill makes coarse, fine or custom threads — internal or external

  • Single-profile design cuts common or custom thread pitches with the same standard tool
  • Cuts internal or external 60-degree threads; produces superior threads versus tapping
  • Eleven sizes from #3 (2 mm) to 3/4-in (24 mm): cut diameters .072 to .625-in with 1 to 6 flutes
  • Crest widths ground from .001 to .004-in depending on size
  • Standard shanks 3/16 to 3/4-in, overall lengths 2 to 4-in; necks ground longer on request
  • Suggested starting parameters: ferrous 150–300 SFM at .0002–.001 IPT; non-ferrous 500–1,000 SFM at .0005–.0015 IPT; interpolate the helix from the bottom up
  • Available uncoated, AlTiN coated (-A) and DLC coated (-DLC)
  • Pair with the RTHR series relief mill when the bottom of a blind threaded hole needs a relief

From the RobbJack Applications Guide.

About this series

THR Solid Carbide Thread Mills

Superior threads versus tapping, coarse, fine or custom

THR Solid Carbide Thread Mills — from the RobbJack applications guide

RobbJack's THR solid carbide thread mills are used to produce precision threads at common thread pitches, or custom thread pitches if needed, with the same standard tool. They produce superior threads versus tapping operations and can be used to cut internal or external 60-degree threads. A single THR tool will make coarse, fine or custom threads. When relief is needed at the bottom of an internal threaded hole, use the matching RTHR series relief mill.

  • Produces superior threads versus tapping
  • Cuts internal or external 60-degree threads
  • One standard tool makes coarse, fine or custom threads
  • Available uncoated, AlTiN coated (-A) and DLC coated (-DLC)
  • 1, 2, 3, 4 or 6 flute depending on size
  • Necks ground longer on request

Inch and metric threads from #3/2 mm to 3/4"/24 mm. Pair with RTHR relief mills for relief at the bottom of internal threaded holes.

Headline spec

Covers thread sizes #3 (2 mm) through 3/4" (24 mm), inch and metric, on a single tool fami

Best for

  • Producing precision internal or external 60-degree threads
  • Replacing tapping for superior thread quality
  • Coarse, fine and custom thread pitches with one tool

Specifications

US machining terms with ISO 13399 codes.

Cutting DiameterDC
0.072″
Shank DiameterDMM
0.1875″
Neck DiameterND
0.04″
Neck LengthLN
0.16″
Thread Form Angle
60° included
Thread Crest
0.001″
Overall Length (OAL)OAL
2″
Number of FlutesNOF
1
Blend Angle (neck→shank)
45°
Entry
Requires a pre-drilled hole
Thread Sizes
#3 / 2mm
Cuts Threads
Internal & external (60° form)
Series
THR — Thread Mill made from Solid Carbide for Inch and Metric Threads

Cuts these materials

AluminumCopper & BrassSteelStainless Steel

See it run

Starting at$116.35

Made & shipped in the USA · lead time confirmed at order. Buy at retail or through your distributor.

Performance guaranteed. Run it against the tool you use today — if it doesn't beat it, we'll make it right.

Adds Aluminum Titanium Nitride (AlTiN) · $118.15 — our pick for your material. Choose another finish below.

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Finishes (3)

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Starting at

$116.35

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More in the THR series

Same series, different size — what changes from this tool is shown in red.