OTT / Spindle Interface  OTT Power Drawbars

OTT-Jakob Power Drawbars

Minimum Volume Lubrication
SK 50 Short
Product List

In 1974, OTT-Jakob developed the power drawbar, which has been continuously improved to meet new application requirements. Today, 250,000 machines worldwide are operating with the OTT power drawbar.

OTT-Jakob now offers a complete program of HSK- and steep taper power drawbars. This makes OTT-Jakob the only manufacturer who offers complete tool clamping systems.

Advanced Machine and Engineering Co. (AME) has been proudly distributing and manufacturing OTT-Jakob drawbars for over 25 years. AME is the only licensed distributor and manufacturer of OTT-Jakob products in North America.

The OTT universal inside spindle contour is an important step towards modular tooling. It offers the manufacturer of machines and/or spindle units the ability to clamp different steep taper tools (taper/retention knob standard) simply by exchanging the gripper unit.

Several variations of power drawbars with or without coolant, with hydraulic or pneumatic unclamp units can be built into the same spindles. Rotary unions and unclamp units are compatible and exchangeable.

The assembly of the OTT-Jakob Power Drawbars can be done easily and quickly by average personnel.

And with the OTT-Jakob universal contour, our drawbars can be used with most known tooling standards:

• DIN 61871 / 69872

• ANSI B5.50

• ISO 7388/1/2 Typ A

• ISO 7388/1/2 Typ B

• MAS 403-1982 BT/PT 2 (30°)

• MAS 403-1982 BT/PT 1 (45°)

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The latest technique of using minimum volumes of coolant for dry operations has become a focal point in the manufacturing industry. OTT-Jakob offers two variations for all HSK-clamping units: External Internal

Both systems can be integrated as modules into existing as well as new HSK-clamping units.

ES Style Drawbar - External minimum volume lubrication

Using external MMKS, the aerosol is produced in a special mixing device outside the spindle. Like coolant, the mixture is fed through a rotary union. OTT-Jakob offers three variations of rotary unions to be used for external minimum volume lubrication for OTT-Jakob HSK-clamping units:

• Dual-passage rotary union (max. 10.000 RPM - mixed externally pmax = 5 bar)

• Single-passage rotary union GDR for OTT-JAKOB unclamp units (max. 16.000 RPM - mixed externally pmax = 5 bar)

• Single-passage rotary union GD for OTT-Jakob unclamp units (max. 36.000 RPM - mixed externally pmax = 5 bar)

IS Style Drawbar - Internal minimum volume lubrication

Using internal MMKS, the air-lubrication mixture is produced inside the spindle. Air and minimum amounts of lubrication are fed separately into the spindle through the OTT-Jakob HSK-clamping unit.

They are mixed directly in front of the tool interface. Changing the mixture ratio allows for a quick adjustment of the aerosol doses.

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SK 50 Short

OTT-Jakob has developed a SK-50 Power Drawbar with a sensational short spindle of 298 mm length. This short spindle length allows for optimum flexibility and space saving construction of 5-axis heads, as well as nutating heads.

Specials

OTT-Jakob and AME can also manufacture special drawbars and configurations to meet your particular needs. Contact our service department to learn more.

For more detail, look at the products below,
or download the OTT-Jakob catalog

Printable Version