Precision CNC Tool Holder Options

HSK Collet Chuck, Collet and Router Bit

HSK Collet Chuck, Collet and Router Bit

Standard HSK collet chucks are currently the most common in use in the woodworking industry. They are relatively inexpensive, and highly flexible due to the wide range of collet sizes that are available and easy to interchange.   While HSK style collet chucks are a good choice for most applications, the multiple parts involved in tool clamping (holder, collet and nut). this style chuck does not provide the tightest possible tolerances or clamping pressure. This is one of the shortcomings that has made thermal heat-shrink tool holders popular. 

Thermal (Heat Shrink) Collet Chuck

Thermal (Heat Shrink) Collet Chuck

Heat-shrink tool chucks have been gaining popularity due to the very tight tolerances (0.003mm / .00012″) and extreme clamping pressures used to hold tools in place.  They are balanced to 30.000 rpm.   These chucks offer a slim, light weight design with very high clamping power and accuracy. This choice of tool holder is ideal for use with insert tooling.  When using solid carbide or PCD (Polycrystalline Diamond) tooling, tool changes must be completed by the use of either an in-house heating element or sent out to an existing tool supplier.  Heat shrink chucks have their specific advantages, but they also have limitations.  Not all  diameters are readily available, the cost is higher than standard collet chucks and the additional cost of a heating element for in-house flexibility, without depending on a third party to remove the tool from the holder, can be considerable.

Hydro Chuck

Hydro Chuck

 Hydraulic tool holders are an often overlooked option to thermal tool holders with the same accuracy and more flexibility.  The hydraulic tool holder works by using fluid to compress an internal membrane within the tool holder. The hydraulic fluid delivers uniform pressure around the membrane allowing it to compress equally around the periphery of the cutting tool (shank) providing an even hold on the tool shank. The hydraulic fluid is activated by the use of a T-handle wrench to turn and activate a pressure screw. To release the pressure and cutting tool from the tool holder, simply turn the pressure screw counterclockwise. In addition to the quick set and release feature, here are a few additional benefits and features:

  •  Precise tool clamping tolerance of 0.00012”
  • Transmission of high torque or clamping pressure
  • Quick tool set up and removal
  • No Heating element or torque wrench required
  • Hydraulic fluid provides vibration absorbing features
  • Flexible with the availability of collet reducers
  • Increased tool performance (finish quality & tool life)

 With clamping tolerances that are comparable to heat shrink tool holders, tool changes are simple and quick. In addition, no heating element is required for tool changes. And, like standard collet tool holders, hydraulic tool holders provide the ability to use different shank tools by the use of high tolerance (collet) reducers.

The ease of use, high clamping tolerances and torque can and will benefit your bottom line by extending tool performance and improving finish output.

For additional information, please contact us!

Center Plug for HSK63F, HSK63E & HSK50F Tool Holders

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dust plug for HSK63F tool holder

Typically, HSK chucks are supplied with a hole through the interior of the cone. The hole is designed to help aid in the release of the chuck from the motor housing. For some customers who are having concerns about contamination and/or dust entering into the motor, there is a solution! GUHDO offers an inexpensive “Plug” that can be quickly installed. Once inserted, the plug becomes integrated with the chuck and will not affect the integrity of the chuck, motor or tooling. This is an inexpensive, simple and easy solution! As a reminder, it is recommended to thoroughly clean your chucks, collet nuts and collets on a regular basis…………………remembering to install NEW collets (ER25, ER32, ER40, SYOZ25 & RDO35) every 500 machine hours!

To buy HSK63F tool holders now, click here!

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dust plug for HSK tool holder

Item# 6375.000.00

The HSK 63 Tool Holder

HSK Tool holder, collet, nut and spiral bit

The HSK 63 high-speed tool holders are made for use on precision CNC routers and machining centers, as well as point-to-point machines with automatic tool changers.  The HSK tool holding system was developed in Germany as a set of standards and performance criteria for advanced machining where precision is imperative. HSK shank styles range from  A through F with the principle difference being the size of the taper. The HSK 63 tool holders lead to improved quality and productivity as the tool holders are designed to be perfectly symmetrical,our tool holders are precision balanced to G2.5 specification, in accordance with DIN69893 . Additionally, they are anti-rust treated and made from the highest quality steel, case hardened to 58±2 HRC,  with a runout tolerance of <0.003 mm.

HSK 63 F Toolholder

HSK 63 F Toolholder

The HSK 63 F style tool holder is the most popular for woodworking machinery and it comes in several variations, depending on which collet system is being used.  ER32 collets have a max tool shank diameter of up to 3/4″ while ER40 and RDO 35 (SYOZ25) collets come in up to a 1″ tool shank diameter.  Generally, the ER collets are used on Italian made machines such as SCM, (Routech, Morbidelli) Biesse, Busellato etc.  The RDO collets (which have a closer tolerance) are mostly used on the German made machines such as Weeke, Homag, HolzHer, and also on the Northwood, Onsrud and Anderson.  The tool holders are interchangeable between machines, so if someone having an SCM Routech CNC machine needs to run a tool with 25mm shank and won’t have the ability with the tool holders that came with the machine, a new tool holder for RDO or ER40 collets is all that is needed! We suggest using tool holder nuts that utilize ball bearings to ensure chatter and slippage are minimized while precision machining.

HSK 63 F Tool Holder

HSK 63 F Tool Holder