ERG32 collet | For Threading | DIN | M2-M30 | - Class AA ≤ 0.008 | Higher accuracy

Kortools

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€16.41

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M3 - (3,5 X 2,7)

M4 - (4,5 X 3,4)

M5-M6 - (6,0 X 4,9)

M8 - (8,0 X 6,2)

M9 - (9,0 X 7,0)

M10 - (10,0 X 8,0)

M12 - (9,0 X 7,0)

M14 - (11,0 X 9,0)

M16 - (12,0 X 9,0)

M18 - (14,0 X 11,0)

M20 - (16,0 X 12,0)

M22-M24 - (18,0 X 14,5)

M27 - (20,0 X 16,0)

M30 - (22,0 X 18,0)

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Product description

ERG32 tapping collet · DIN

AA grade · runout ≤0.008 mm · round shank and square drive

The ERG32 collet holds machine taps with a cylindrical shank and a square drive end. Select the DIN version by both tap shank diameter and square size. The collet fits a corresponding ER32 tool holder and nut.

1. Application and drive arrangement

The round front section of the bore clamps the cylindrical tap shank. The rear square section engages the tool square and transmits torque. This arrangement helps prevent the tap from slipping inside the collet during tapping.

The collet is a clamping component for machine tapping. It can be used with a suitable rigid-tapping or compensating holder, depending on the tool assembly. Compensation is provided by the appropriate holder; select the collet to match the clamping system and tap shank.

2. Collet technical data

Parameter	Construction
Collet family	ERG32
Holder and nut system	ER32
Tap version	DIN
Accuracy grade	AA
Declared collet runout	≤0.008 mm
Construction	65 manganese spring steel
Heat treatment	Hardening
Outside diameter	Ø33 mm
Length	40 mm

Tap shank diameter and square size depend on the selected option. Its card lists both values separately, together with the outer collet dimensions. The size and grade are marked on the collet face.

3. Reading the option dimensions

Designation	Meaning	Selection check
M size	Nominal thread size produced by the tap	It does not replace tap shank diameter or square size.
Tap shank diameter	Diameter of the cylindrical clamping section	Match it to the round bore section in the selected collet.
Tap square size	Distance across the opposite flat sides of the square drive	Match it to the square bore section in the collet.
Collet outside diameter	Outer dimension of the ERG32 collet: Ø33 mm	Identifies the clamping family, rather than the tap shank diameter.
Collet length	Axial collet dimension: 40 mm	Separate from tap length and projection from the holder.

Read the option designation as a whole: the M size together with the shank and square dimensions identifies the selected version. A given thread size may be available with different clamping dimensions. Compare both dimensions of the actual tap when selecting a collet.

Choose the required size in the option selector. Photographs and diagrams are illustrative and not to scale; use the stated dimensions. Do not determine the bore size by measuring the photograph.

4. Matching the holder, nut and tap

Component	Required match	Selection method
Holder	A seat for ER32 system collets	Check the clamping-system designation and tapping-holder arrangement.
Nut	A version intended for ER32 collets	Seat the collet correctly in the retaining feature inside the nut.
Tap	Cylindrical shank and square matching the selected option	Compare the tap shank diameter and square size separately.

This listing uses the DIN version. Shank and square dimensions of other versions, including JIS and GB, must be checked separately. An M designation or similar collet appearance alone does not establish clamping compatibility.

5. Installing the collet in the nut

First seat the collet in the nut, then assemble it with the holder. Follow the sequence below to engage the retaining feature inside the nut.

Step	Action	Clamping component
1	Insert the collet into the nut at an angle.	Nut and collet selected for the same ER system.
2	Engage the collet with the retaining feature inside the nut.	The eccentric or cylindrical retaining feature in the nut.
3	Press the collet into the nut.	Collet seated in the retaining feature.
4	Assemble the nut with the holder and clamp the matching tap.	Tap shank and square matching the selected option.

6. Removing and changing the collet

Unscrew the nut containing the collet and remove the tool.
Tilt the collet inside the nut to shift its position slightly.
Press the collet sideways until it starts to release from the retaining ring in the nut.
Rotate the nut to help release the collet completely.

When changing tools, select the next collet by the clamping family and the shank and square dimensions of the new tap. Face markings help identify the collet size and grade.

7. AA grade, runout and construction

The collet has AA grade and declared runout of ≤0.008 mm, equivalent to ≤8 µm. It is made from hardened 65 manganese spring steel. Manufacturing includes dynamic balance correction. The runout value describes the collet; it is not a thread-diameter tolerance or an accuracy specification for the complete holder and tap assembly.

Selection includes both the cylindrical shank in the clamping section and the square end in the collet drive. Accuracy grade does not replace dimensional compatibility. Match the tapping assembly to the particular operation, including any compensation required from the holder.

8. Collet selection questions

Is selecting the M thread size sufficient?

Also compare cylindrical shank diameter and square size. The selected option card states these dimensions separately.

Which section transmits tap drive?

The rear square bore section engages the tap square. The front round section clamps the cylindrical shank.

Does the purchase include a tap or holder?

The purchase is one collet in the selected size. The tap, holder and nut in application photographs demonstrate use and are not supplied as a set with the collet.