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MAH-06

Precision Extension Holder for Metric Size End Mill with Metric Shank

Accuhold End Mill Extension Holder 6mm ID, 16mm OD, 125mm OAL

Precision Extension Holder for Metric Size End Mill with Metric Shank — MAH-06
Series photo — representative of the MAH family
ACH extension holder dimension diagram showing overall length, shank diameter and hole diameter for straight and stepped-head styles
Dimension reference — labels match the specifications below
Speeds & FeedsDialed to this exact tool — free
RobbJack ACH Accuhold ultra precision end mill extension holder with set screws

Accuhold ultra-precision end mill extension holders — +.00015"/-0 hole tolerance to eliminate runout and tool breakage.

  • Hole diameter tolerance +.00015"/-.00000 — the tightest-tolerance end mill extension, made to eliminate runout (TIR) and reduce tool breakage
  • Reaches into deep parts: standard lengths 2-1/8" to 6-1/2" including -L long versions (ACH-04-L, ACH-06-L, ACH-08-L, ACH-12-L, ACH-16-32-L)
  • Inch ACH line holds 3/32" to 1" tool shanks on 3/8" to 1-1/4" holder shanks
  • ACH-M metric-to-inch line holds 3mm to 25mm tool shanks on inch holder shanks — converts an inch tool holder to metric tooling
  • MAH all-metric line: 3-12mm holes on 10-25mm shanks, 82.5-150mm OAL
  • Set screw sizes from 5-40 up to 7/16-20 matched to each holder
  • Large sizes use stepped heads: ACH-16/M12 have a 1" dia x 1.5" head; ACH-24/32 and ACH-M18/M25 have 1-1/4" dia x 2-1/4" heads with 2" hole depth
  • Shank tolerance -.0001/-.0003, OAL +/-.060

From the RobbJack Applications Guide.

About this series

MAH Precision Extension Holders for Metric End Mills

Precision extension reach for metric-shank end mills

The MAH is a precision extension holder for metric-size end mills, the metric counterpart to the ACH Accuhold. Hole diameters range from 3 mm to 12 mm on metric shanks with overall lengths from 82.5 mm to 150 mm.

  • Precision extension holder for metric end mills
  • Hole Dia. tolerance +.004/-.000 mm
  • Shank Dia. tolerance +.000/-.007 mm
  • OAL tolerance +/-1.5 mm

Holds metric-shank end mills; MAH-12 has a 1" diameter x 1.5" long head

Headline spec

Metric hole diameters 3 mm-12 mm; metric shanks; 82.5 mm to 150 mm OAL

Best for

  • Reaching into parts that need longer length
  • Extending precision metric end mills while maintaining low runout

Specifications

US machining terms with ISO 13399 codes.

Holder DiameterDMM
0.6299″
Accessory Type
Extension Holder
Overall Length (OAL)OAL
4.9213″
Series
MAH — Precision Extension Holder for Metric Size End Mill with Metric Shank

Cuts these materials

AluminumCopper & BrassTitaniumMagnesiumCast IronSteelStainless SteelSuperalloys (Inconel…)PlasticsCompositesHardened 30–40 HRcHardened 41–50 HRcHardened 51–60 HRcWood

See it run

Tolerances

TypeMinMax
Hole Diameter0+0.004
Overall Length-1.5+1.5
Shank Diameter-0.0070
Starting at$283.30

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 Uncoated · $283.30 — our pick for your material. Choose another finish below.

Calculate Speeds & FeedsDownload ISO 13399 data (.csv)

Finishes (1)

  • Uncoated

    MAH-06

    $283.30

    Available to order

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Starting at

$283.30

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More in the MAH series

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