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POKOLM Frästechnik GmbH & Co. KG
Hydraulic zero-reach arbors

Hydraulic zero-reach arbors

Product catalog summary

1. Hydraulic Zero-Reach Arbors: Features and Benefits

Hydraulic zero-reach arbors provide precise tool alignment with maximum concentricity, ensuring superior machining accuracy. They incorporate vibration damping to improve surface finish and extend tool life, combined with high radial rigidity for stability during high-speed operations. Clamping is achieved without additional devices, simplifying setup and reducing changeover times. The clamping range is flexible (3 to 32 mm) via reduction sleeves, maintaining continuous clamping force even at high speeds. The hydraulic system enhances process reliability by reducing micro-chipping and allowing axial longitudinal adjustment for repeat accuracy. These arbors support Minimum Quantity Lubrication (MQL) and are designed for easy maintenance. Compatibility includes direct clamping of plain shanks (DIN6535HA), Weldon flats (DIN6535HB), and WhistleNotch toolholders (DIN6535HE) using reduction sleeves.

2. Hydraulic Chucks and Arbor Systems

Hydraulic chucks offer continuous cutting edge action with excellent vibration damping, resulting in superior surface quality and extended tool life. They support high-speed machining up to 25,000 rpm and are compatible with taper shanks conforming to DIN 69871 AD, ISO 7388-1 AD, and JIS B 6339 AD standards. Arbor types include SK 40, SK 50, BT 40, and BT 50, each tailored for specific diameters and equipped with retention knobs (with or without through holes) to ensure secure tool holding.

3. Accessories and Adaptors

Reduction Sleeves: Precision sleeves for diameters 3–16 mm (D20) and 6–25 mm (D32), featuring coolant sealing and slits for flexibility, with a repetition accuracy of 6 µm.
Plain Shank Shrinking Adaptors: Designed for diameters 3–12 mm, these adaptors enable fast, economical access to deep cavities with high rigidity (h5 tolerance).
POKOLM DUOPLUG® Solid Carbide Adapters: For M7 to M16 screw-on end mills, providing backlash-free fitting, extreme precision, and retention force suitable for roughing and high-speed cutting (HSC).
Solid Carbide Adapters for Screw-On End Mills: Available for M6 to M16, featuring internal coolant supply and high precision optimized for roughing applications.
Dense Antivibration Adapters: For M8 to M16, designed to reduce vibrations during finishing, enhancing surface quality and tool life; internal coolant supply available on request.
Threaded Shank Adapters with Cylindrical Shaft (DIN6535HA and DIN6535HB): For M6 to M16, compatible with collet chuck arbors and hydraulic expansion chucks; DIN6535HB variants include Weldon collet surfaces for enhanced clamping security.

4. Technical Specifications and Standards

All products comply with international standards including DIN 69871, ISO 7388-1, JIS B 6339, and the DIN 6535 series, ensuring broad compatibility and interchangeability. Maximum rotational speeds reach up to 25,000 rpm. The components support Minimum Quantity Lubrication (MQL) regardless of rotation direction, enhancing sustainable machining practices.

5. Summary of Advantages and Best Practices

Hydraulic zero-reach arbors deliver superior concentricity and vibration damping, improving surface finish and extending tool life.
Wide clamping flexibility and a comprehensive range of accessories allow adaptation to diverse machining needs.
Maintenance is user-friendly, enabling straightforward hydraulic system upkeep without specialized support.
Use of precision reduction sleeves and matched accessories ensures reliable and accurate tool holding across a broad diameter range.
Strict adherence to international standards guarantees compatibility with a wide variety of tools and machines.

Overall, the hydraulic zero-reach arbor system combined with POKOLM accessories offers a robust, precise, and efficient solution for high-speed, high-precision machining applications.

Manufacturer Information

Produced by Pokolm Frästechnik GmbH & Co. KG, located in Harsewinkel, Germany. Contact: phone +49 5247 9361-0, fax +49 5247 9361-99, email [email protected], website www.pokolm.com.

Additional Notes

The product follows the POKOLM standard with smoothed planes and mating surfaces, including an option for internal coolant supply to enhance machining performance. Some alphanumeric codes in the document likely refer to product or batch identifiers but lack further context.

Catalog excerpts

HYDRAULIC ZERO-REACH ARBORS Zero-reach arbors with hydraulic chuck and matching POKOLM accessories

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© HYDRAULIC ZERO-REACH ARBORS © ARBOR AND ADAPTER SYSTEMS Arbors and adapters with hydraulic chucks stand out by optimum concentricity, continuous action of the cutting edge and excellent vibration-damping properties. All these features provide an optimum surface of the workpiece and outstanding tool lives. Moreover, the hydraulic clamping system reduces microchipping on the cutting edge, thus saving costs. In addition, the system provides continuous clamping forces even at high speeds, thus ensuring optimum process reliability over all speed ranges. Exact repeat accuracy is ensured by the axial...

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VARIOUS POSSIBILITIES OF COMBINATIONS WITH ACCESSORIES FROM THE POKOLM RANGE OF PRODUCTS Zero-reach arbor SK with hydraulic chuck Page 4 Zero-reach arbor BT with hydraulic chuck Page 5 Reduction sleeves Page 6 Solid carbide / dense- Threaded-shank Threaded-shank antivibration adapters adapters with adapters with for threaded shank end plain shank plain shank and mill bodies Weldon flat Page 14 Page 15 Pages 10 - 13 DUOPLUG® adapters Pages 8 - 9 Shrinking extensions Page 7 DUOPLUG® shrinking adapters *1 Milling cutter bodies with DUOPLUG® connection *2 *1) Catalogue “Arbors and adapter systems”...

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© HYDRAULIC ZERO-REACH ARBORS © ARBOR AND ADAPTER SYSTEMS SK 40 | SK 50 -DIN 69 871 AD Hydraulic chuck | Zero reach arbor • Taper shank acc. to DIN 69871 AD or ISO 7388-1 AD • Permitted up to max. 25,000 rpm • MQL capable, independent of the direction of rotation • Suited for direct clamping of all shanks that comply with DIN 6535 Retention knobs without through hole KBSK40-69872B 1^1 available as long as stock lasts stock item, subject to confirmation

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Taper shank, form BT / JIS B 6339 AD Permitted up to max. 25,000 rpm MQL capable, independent of the direction of rotation Suited for direct clamping of all shanks that comply with DIN 6535 Hydraulic chuck | Zero reach arbor Gpokolm PREMIUM TOOLS. WE KNOW HOW.

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© HYDRAULIC ZERO-REACH ARBORS © ARBOR AND ADAPTER SYSTEMS REDUCTION SLEEVES FOR HYDRAULIC CHUCK D20 for diam. 3 - 16 mm | D32 for diam. 6 - 25 mm Precision reduction sleeve • Coolant-sealed • Slit, for different diameters • Suited for the clamping of all shanks complying with DIN6535 • Repetition accuracy 6 ^m Collets in other sizes and variants on request. 1^1 available as long as stock lasts stock item, subject to confirmation

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Pokolm plain shank shrinking adaptors are suitable for fast and economic reach of deep cavaties. Shanks are produced in h5 tolerance and provide an exceptional high degree of rigidity during processing. Gpokolm PREMIUM TOOLS. WE KNOW HOW.

Open the catalog to page 7

© HYDRAULIC ZERO-REACH ARBORS © ARBOR AND ADAPTER SYSTEMS POKOLM DUOPLUG®M 7 - M 16 The solid carbide adapters which are part of the POKOLM DuoPlug®-System are especially suited for HSC and provide absolutely backlash-free fitting and extreme precision combined with the retention force required for roughing applications. 1^1 available as long as stock lasts stock item, subject to confirmation

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Gpokolm MIEMIUMTOOLS. WE KNOW HOW.

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 HYDRAULIC ZERO-REACH ARBORS  ARBOR AND ADAPTER SYSTEMS SOLID CARBIDE ADAPTERS FOR SCREW-ON END MILLS M 6 - M 16 POKOLM solid carbide adapters for screw-on end mills are well suited for HSC and with extreme precision provide the retention force required for roughening applications. All adapters have an internal coolant supply as standard.

Open the catalog to page 10

Gpokolm MIEMIUMTOOLS. WE KNOW HOW.

Open the catalog to page 11

© HYDRAULIC ZERO-REACH ARBORS © ARBOR AND ADAPTER SYSTEMS DENSE ANTIVIBRATION ADAPTERS-FOR SCREW-ON END MILLS M 8 - M 16 POKOLM solid carbide adapters for screw-on end mills are characterised by their outstanding precision. These adapters are excellent for HSC finishing processes thanks to their vibration-reducing characteristics. Adapters are also available with an internal coolant supply upon request. 1^1 available as long as stock lasts stock item, subject to confirmation

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Gpokolm MIEMIUMTOOLS. WE KNOW HOW.

Open the catalog to page 13

© HYDRAULIC ZERO-REACH ARBORS © ARBOR AND ADAPTER SYSTEMS THREADED SHANK ADAPTERS WITH CYLINDRICAL SHAFT - DIN6535HA M 6 - M 16 Threaded adapters with a cylindrical shaft according to DIN6535HA. For use in collet chuck arbors or also hydraulic expansion chucks. Manufactured according to the POKOLM standard with smoothed plane and mating surfaces and an internal coolant supply option. 1^1 available as long as stock lasts stock item, subject to confirmation

Open the catalog to page 14

Threaded shank adapter with a cylindrical shaft and an additional Weldon collet surface according to DIN6535HB. For use in Weldon arbors. Manufactured according to the POKOLM standard with smoothed plane and mating surfaces and an internal coolant supply option. Gpokolm PREMIUM TOOLS. WE KNOW HOW.

Open the catalog to page 15

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