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milling chuck / expandable
milling chuck
FORTIS

Schunk's Fortis is an expansion arbor that offer a high run-out precision and repeatability which is less than .003mm with high clamping forces that ensure the protection grip of the workpiece. It also features stiffened ...

milling chuck / hydraulic / expandable / high-precision
milling chuck
AK182

- Meets all the requirements for a powerful, high-precision adaptor system - Up to 40% longer tool life - High level of concentricity and vibration damping, particularly for milling - Enables tool change in seconds without ...

grinding chuck / milling / turning / expandable
grinding chuck
MFS

APPLICATION Internal clamping of round workpieces. Turning, milling, grinding and toothing operations, as well as for balancing and measuring. Ideal for thin-walled and long workpieces or long clamping lengths. TYPE Manually ...

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RÖHM
balancing chuck / grinding / turning / expandable
balancing chuck
KFR mit Axialzug

APPLICATION Internal clamping of round workpieces. Turning, grinding and toothing operations, as well as for balancing and measuring. Ideal for short clamping lengths / workpieces. TYPE Force-actuated. Clamping sleeves optionally ...

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RÖHM
balancing chuck / grinding / turning / expandable
balancing chuck
MFR ohne Axialanzug

APPLICATION Internal clamping of round workpieces. Turning, grinding and toothing operations, as well as for balancing and measuring. Ideal for short clamping lengths / workpieces. TYPE Manually actuated. Optional vulcanized ...

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RÖHM
grinding chuck / milling / turning / expandable
grinding chuck
KFS

APPLICATION Internal clamping of round workpieces. Turning, milling, grinding and toothing operations, as well as for balancing and measuring. Ideal for thin-walled and long workpieces or long clamping lengths. TYPE Force-actuated. ...

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RÖHM
grinding chuck / milling / turning / expandable
grinding chuck
KFB

APPLICATION Internal clamping of round workpieces. Turning, milling, grinding and toothing operations, as well as for balancing and measuring. Ideal for very small clamping diameters starting from Ø 5.5 mm or small workpieces. TYPE ...

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RÖHM
clamp chuck / pneumatic / expandable / precision
clamp chuck
PM series

- Pneumatical clamping / release - For use on measuring machines and precision engineering Specifications - For collet holders ER32 - Clamping range Ø 1-22 mm - Locking pressure pneumatically adjustable - Installable ...

machining chuck / manual tightening / expandable
machining chuck
BKDF series

The BKDF is manufactured by SIAM Ringspann. It is a taper collet flange mandrel BKDF, that works as a complete clamping fixture. Features of the BKDF includes clamping diameter range from 11,9 mm to 129,6 mm, and running accuracy of ≤ ...

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RINGSPANN
machining chuck / expandable
machining chuck
HKDF series

Diameter: 9 mm - 175 mm

The HKDF unit is a tapered sleeve flange mandrel that is ideally utilized by applications that dea with clamping diameters ranging from 9 to 175 mm. It is capable of providijng operators with a running accuracy that does not exceed 0.01. ...

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RINGSPANN
machining chuck / manual tightening / expandable
machining chuck
KFDF series

Flat Element Flange Mandrels KFDF as Complete Clamping Fixture Features For clamping diameters from 120 mm to 325 mm High true running accuracy ≤ 0,01 mm Permissible workpiece tolerance up to IT11 Very short clamping fixture ...

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RINGSPANN
machining chuck / expandable
machining chuck
KUD series

Diameter: 70 mm - 200 mm

The Precision Clamping Mandrel has 0.01mm and high true running accuracy, IT11 permissible work piece tolerance, very short clamping fixture length, less than 2mm rubberized slots in the Short Element for blind bores, simple configuration, ...

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RINGSPANN
machining chuck / manual tightening / expandable
machining chuck
KBD series

The Expanding KBD is manufactured by Ringspan. The product is integrated wtih rubberized slots in the disc element, and features the possibility of hand clamping is optional. This unit's clamping diameter ranges from ...

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RINGSPANN
machining chuck / manual tightening / pull-back / expandable
machining chuck
BKDF Series | Ø serrage serrage entre 11,9 mm et 129,6 mm

Diameter: 70 mm - 140 mm

This product is often regarded as a complete clamping fixture, offering support for various applications in the industry. In addition to the support for clamping diameters between 11.9 and 129.6 mm, the high true running accuracy is below ...

clamping sleeve chuck / expandable
clamping sleeve chuck
SP

Diameter: 5 mm - 400 mm

... System, the clamping sleeves are compressed in the direction of the force by introducing an axial force, which causes them to expand radially. This simultaneously eliminates the clearance between the clamping sleeve and ...

milling chuck / expandable
milling chuck
SZ

Diameter: 5 mm - 400 mm

By introducing an axial force, a split collet is expanded radially over a taper. This coincides with an axial movement of the collet. The workpiece is clamped. The SZ System is used when the clamping basis of the workpiece ...

milling chuck / hydraulic / expandable
milling chuck
SH

Diameter: 5 mm - 300 mm

... with hydraulic fluid. By introducing force using a piston, pressure accumulates in the system. This widens the thin-walled expansion zone radially and effects workpiece clamping. The SH System is particularly suited ...

machining chuck / expandable / 6-jaw
machining chuck
MANDO T211

Diameter: 20 mm - 120 mm
Rotational speed: 3200 rpm - 7000 rpm
Gripping force: 42 kN - 170 kN

With draw bolt. Advantages Form-compensating segmented clamping bushings upon request Clamping range from Ø 20 – 120 mm with only 5 mandrel sizes

machining chuck / expandable / 3-jaw
machining chuck
MANDO T212

Diameter: 8 mm - 100 mm
Rotational speed: 4000 rpm - 7000 rpm
Gripping force: 42 kN - 170 kN

Without draw bolt. Advantages Clamping without draw bolt, consequently ideal for blind bores Clamping range from Ø 8 – 100 mm with only 8 mandrel sizes

machining chuck / expandable / 6-jaw / workpiece
machining chuck
MANDO T812

Rotational speed: 6000 rpm - 7000 rpm
Gripping force: 42 kN - 150 kN
Length: 136 mm - 193 mm

Without draw bolt. Advantages Only radial clamping, no pull-back against workpiece end-stop – ideal for pick-off from the main spindle Clamping without draw bolt, consequently ideal for blind bores Clamping range from ...

machining chuck / expandable
machining chuck

To balance tools with cylindrical bore Precise centrically clamping for highest repeatability Fine balanced to < 1 gmm Individual useable

milling chuck / expandable
milling chuck
FORTIS

The Fortis is an expansion arbor manufactured by Schunk. Its key features include a superior run-out precision, a repeatability of less than 0.003mm, superior clamping forces that ensure fixed workpiece grip, a robust ...

machining chuck / hydraulic / expandable
machining chuck

... consisting of spindle, chuck and tool. For this MAPAL is now presenting its new alignable chuck based on the proven hydraulic expansion technology with which the errors of the overall ...

turning chuck / hydraulic / expandable
turning chuck

... pyramid mandrel (expand when pushed), reverse pyramid mandrels (expand when pulled) offer the following advantages. Compressive stress is applied on segments instead of tensile stress, so the system ...

machining chuck / expandable / 6-jaw
machining chuck
T-EP series

Diameter: 8 mm - 235 mm

Use: turning, grinding, balancing and inspection operations High degree of expansibility 1.5 to 5 mm depending on the diameter of the sleeve Possibility to clamp worpieces with diameters ranging from 8 to 235 mm Clamping takes place as ...

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TOBLER
machining chuck / expandable / 4-jaw
machining chuck
T-EPN series

Diameter: 5.5 mm - 79.7 mm

... The workpiece is clamped by tightening the sleeve with the knurled ring. The movement of the sleeve up the tapered arbor expands the sleeve, ensuring that the workpiece is clamped tightly. The movement of the sleeve ...

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TOBLER
milling chuck / expandable / 4-jaw
milling chuck

Hardinge force-limiting step chuck takes the headache out of thin-wall turning. Maintain inside and outside concentricity of thin-wall parts in a fail-safe process while eliminating the nuisance of manually tweaking the ...

milling chuck / expandable
milling chuck
EM-A

Diameter: 14.7 mm - 129.7 mm

Hand or Power Operated Expanding Mandrels Size Range: 14.7mm - 129.7 mm Large Expandability (1 - 2mm, depending on size) Flange Mounting Very Rigid Design

milling chuck / expandable
milling chuck
EM-B

Diameter: 16 mm - 129.5 mm

Hand or Power Operated Expanding Mandrels Size Range: 16mm - 129.7 mm Large expandability (1 - 1.5mm, depending on size) Flange Mounting Very Rigid Design

turning chuck / Morse taper / expandable / 4-jaw
turning chuck
QUADRO®

Diameter: 100 mm
Length: 83.5 mm - 128 mm

The KSD cone expanding mandrels are ingeniously designed components, geared to deliver excellent clamping results for compact work-pieces. The clamping is accomplished internally with maximum clamping size being 100 mm. ...

turning chuck / expandable / 4-jaw
turning chuck

Diameter: 18 mm - 80 mm
Rotational speed: 5000 rpm
Length: 122 mm - 179 mm

The cone expanding mandrel CenterGrip is designed without a draw bolt making it possible to clamp the whole length of blind holes. The 6-segmented sleeves (CG30 = 3 segments) depends on the reliable Rubber-Flex® vulcanising ...

machining chuck / Morse taper / expandable
machining chuck

milling chuck / hydraulic / expandable
milling chuck
Hydrocentrics

drill chuck / hydraulic / expandable
drill chuck
SDH

Diameter: 100 mm

... the centring force, one of the secrets of the low deformation hydraulic STIEFELMAYER clamping principle. As with other clamping chuck types, the segment clamping jaws are controlled separately, resulting in as little ...

turning chuck / expandable / 3-jaw
turning chuck

Segment clamping mandrels have a relatively large clamping stroke, unlike slide bush clamping mandrels, for example. They can be used universally for centring or clamping. We have already realised clamping mandrels for many different ...

machining chuck / clamping sleeve / expandable
machining chuck

Internal clamping sleeves with double taper are suited to internal clamping of pre-machined parts. Because these have tapers and slots at both ends, the clamping sleeve is able to open in various different ways and securely hold workpieces ...

How to choose this product

expandable-chuck

Expanding mandrels are tool components used to grip objects by their inner diameter. They hold workpieces for machining applications such as turning, milling and grinding.

Applications

Expanding mandrels are most often used on lathes for turning operations. They can also hold parts for measuring purposes, such as checking for concentricity. They also can hold multiple parts simultaneously, making them preferable to lathe chucks for certain turning operations.

Technologies

The expanding mandrel holds a hollow workpiece from within to facilitate work on its exterior surface. A screw or piston gradually expands the tapered mandrel until it grips the piece firmly.

How to choose

Be sure to determine the approximate diameter of the workpiece when selecting an expanding mandrel.

Advantages

- Concentricity