Name: 1/4"-20 UNC HSS-PM Roll Tap, 0.255" Shank x 0.858" Thread Length, 3XD, Mod. Bottoming, GH6, TiCN Coated
Brand: Haas Tooling
SKU: 03-1894
Price: 36.95 USD
Availability: InStock
Rating: 5 (7 reviews)

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1/4"-20 UNC HSS-PM Roll Tap, 0.255" Shank x 0.858" Thread Length, 3XD, Mod. Bottoming, GH6, TiCN Coated

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This ER16 tap collet for 1/4" taps has a 0.255" bore diameter and a 0.191" built-in square drive to securely grip flat-sided tap shanks, providing maximum concentricity and the extra torque required for tapping. It has a 0.0006" TIR, and is defined by collet class 2, per DIN ISO 15488. This collet has no clamping range; the tool shank must be the exact diameter of the collet bore. Ensure that your collet bore matches the size of your respective tap shank.

ER16 1/4" Tap Collet, 0.255" Bore Diameter x 0.191" Square

This ER25 tap collet for 1/4" taps has a 0.255" bore diameter and a 0.191" built-in square drive to securely grip flat-sided tap shanks, providing maximum concentricity and the extra torque required for tapping. It has a 0.0006" TIR, and is defined by collet class 2, per DIN ISO 15488. This collet has no clamping range; the tool shank must be the exact diameter of the collet bore. Ensure that your collet bore matches the size of your respective tap shank.

ER25 1/4" Tap Collet, 0.255" Bore Diameter x 0.191" Square

This ER32 tap collet for 1/4" taps has a 0.255" bore diameter and a 0.191" built-in square drive to securely grip flat-sided tap shanks, providing maximum concentricity and the extra torque required for tapping. It has a 0.0006" TIR, and is defined by collet class 2, per DIN ISO 15488. This collet has no clamping range; the tool shank must be the exact diameter of the collet bore. Ensure that your collet bore matches the size of your respective tap shank.

ER32 1/4" Tap Collet, 0.255" Bore Diameter x 0.191" Square

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System of Measurement	Inch - ANSI
Thread Series	UNC - Unified Natl. Coarse
Thread Size	1/4"-20
Tap Type	Roll Tap
Chamfer Type	Modified Bottoming
Shank Type	Square
Material	HSS-PM
Coating	TiCN
[TPI] Threads per Inch	20 tpi
Tap Drill Diameter	0.226 in
[ØDC] Cutting Diameter	0.25 in
[ØDMM] Shank Diameter	0.255 in
[L2] Chamfer Length	2P - 3P
[L1] Thread Length	0.858 in
[LU] Usable Length	1.0 in
[OAL] Overall Length	2.5 in
[SS] Square Size	0.191 in
[FHA°] Helix Angle	0
Length / Diameter	3 X D
Thread Class	GH6
Through Spindle Coolant	No
Weight	0.1 lbs \ 0.1 kg
Country of Origin	South Korea

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1/4"-20 UNC HSS-PM Roll Tap, 0.255" Shank x 0.858" Thread Length, 3XD, Mod. Bottoming, GH6, TiCN Coated

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