Header icon logo top left
Quick Order
0

Enhance your machining capabilities with our high-quality ER collet chucks. Discover a range of chucks designed for precision toolholding and superior performance. Our ER collet chucks offer excellent rigidity, runout accuracy, and clamping force, ensuring optimal results in milling and other machining operations. Choose from various sizes and configurations to meet your specific needs.

Product Overview

ER Collets

 

  • It’s no secret that tooling in machining impacts precision, efficiency, and overall productivity –whether you’re looking at turning, boring, or CNC milling operations. At Haas Tooling, we offer a wide range of high-quality tooling solutions designed to make the most of your machining performance and reliability.
 
  • From general-purpose collets to specialized precision tooling, our selection helps machining operations across industries such as aerospace, automotive, medical, and general manufacturing. With Haas Tooling, machinists can confidently achieve consistent, accurate, and efficient results.

 

High-Performance Collets for Precision Machining

 

  • Collets hold cutting tools securely during high-speed operations, and when you can’t have setbacks in production, only the best collets will do. Haas Tooling provides a comprehensive selection of collets for precision machining, ensuring consistent and accurate results, from job to job. Our collets include popular types such as the ER collet, widely known for its versatility and gripping force. Whether you’re performing high-speed milling or detailed finishing work, Haas Tooling’s collets deliver consistent performance.

 

  • Our ER collet chucks offer accurate and reliable toolholding capabilities, so your cutting tools remain stable and secure during machining operations. These CNC collets are ideal for various machining applications, from general roughing to precision finishing tasks. We ensure that every collet meets stringent quality standards, providing superior concentricity and minimal runout to ensure consistent machining results. By investing in high-quality collets from Haas Tooling, you can improve machining accuracy, reduce tool wear, and extend tool life.

 

Mill Collets and Toolholding Solutions

 

  • Mill collets specifically cater to operations where stability, accuracy, and durability are non-negotiable. Haas Tooling mill collets are precision-engineered to handle the demanding conditions of milling processes, so your tools are held securely, even under heavy machining loads. These collets are available in multiple sizes and configurations, accommodating a wide range of tooling, and allowing you to switch tools quickly.

 

  • In addition to standard CNC collet offerings, Haas Tooling provides advanced toolholding solutions, including application-specific collets and ER collet systems, designed to streamline setup and performance. With Haas Tooling’s comprehensive tooling lineup, confidently tackle machining tasks as efficiently and accurately as possible.

ER COLLETS RUNOUT TOLERANCE

 

DIN ISO 15488 specifies the dimensions, materials and manufacturing requirements, and designation of collets (of form A or of form B) for tools with cylindrical shanks and their corresponding holders and nuts. All Haas ER collets are manufactured to meet or exceed these requirements.

 

  • Form A: 6 to 8 slots.
  • Form B: 12 to 16 slots.

 

This International Standard also specifies collet runout tolerances. These tolerances are checked as is shown in the figure below, by the introduction of a test mandrel into the collet. The diameter of the test mandrel is the nominal diameter of the collet.

For the test mandrel, the following specifications apply:


a) diameter tolerance: h6;
b) cylindricity: 0.002mm;
c) parallelism: 0.002mm;
d) roundness: 0.002mm;
e) surface without longitudinal marks;
f) maximum surface roughness Rz = 4µm;
g) surface hardness: (58 +3/-0) HRC.

 

ER Collet Chucks
ER Collet Chucks

ER COLLET CHUCKS OVERVIEW

 

ER Collet Chucks – Features

 

  • Powerful chucking, high precision, and easy operation
  • Stable, precise machining at high rotational speeds
  • Small-bore nut design minimizes interference with workpiece, and speeds operation
  • Various nuts can be used, depending on application
  • Double-taper collets have longer clamping area for excellent gripping torque

Hollow Taper Shank (HSK) Toolholding – Benefits

 

  • Dual-contact taper for high rigidity and high accuracy
  • More rigid toolholders for long-reach tools
  • Increased performance for 3D profiling
  • Increased performance when using small cutting tools 

STRONG GRIPPING TORQUE

  • The longer clamping area of the double-taper collet provides stronger gripping force, and higher transferrable torque
  • Additional gripping torque can be achieved by using a ball bearing nut

EASY ASSEMBLY AND DISASSEMBLY

To assemble the collet, gently insert the groove of the collet into the eccentric ring inside the nut, and then snap the collet into place. To disassemble the collet, tilt the collet to the side until it snaps out of the eccentric ring, and remove it from the nut.

STANDARD ER COLLET TORQUE SPECIFICATIONS

Proper torque is an important variable for toolholding; too little torque and the cutting tool can slip, pull-out, or vibrate excessively, and too much torque can lead to accelerated wear, damage, or potentially increased runout (TIR). Below is a table that suggests standard torque values for each respective ER-taper size.

ER Collet Essentials. Do You Know?

Whether you’re a beginning or advanced machinist, you’ve probably wondered more than once if you’re using the correct collet. With so many to choose from – and often confusing sizes on the collets – it’s hard to know if you’re using the right one. In this valuable Tip of the Day, Mark looks at each type of collet, and explains how and when to use each one.

ER Straight-Bore Collets – Features

 

NOTE: These collets have a clamping range. Use the tightest collet available for any given tool shank, to provide the greatest tool-to-collet contact area while minimizing runout. 
In the case of a Ø12.2 mm tool, do not use a Ø12–11 mm collet. Instead, use a Ø12.5–11.5 mm collet. For general cutting applications, a Ø13–12 mm collet is usable.

 

  • Can be used to hold any type of round shank tool
  • Flexibility to clamp a wide range of tool shanks
  • High accuracy and concentricity


ER8:     0.5 – 5mm

             0.012 – 0.187"

 

ER11:   0.5 – 8mm

             0.043 – 0.281"

 

ER16:   0.5 – 10mm

             0.043 – 0.375”

 

ER20:   0.5 – 12mm

             0.043 – 0.5”

 

ER25:   1 – 16mm

             0.086 – 0.625”

 

ER32:   2 – 20mm

             0.086 – 0.781”

 

ER40:   2 – 26mm

             0.086 – 1”

ER Sealed Collets – Features

NOTE: Collet bore is the exact diameter of the tool shank. These collets have no clamping range. 

 

  • Fits all Haas ER collet chuck holders
  • Ensures 100% of through-tool/spindle coolant gets to the tip of the cutting tool
  • Approved for high-pressure coolant to 1100 psi
  • Short rear collet slots provide a mechanical seal, blocking coolant flow
  • Mechanical seal design is superior to silicone/rubber sealed collets
  • Do not require a coolant ring or special ER nut
  • To seal properly, the entire tool shank must be in the collet and cover all slots

ER Tap Collets – Features

NOTE: Collet bore is the exact diameter of the tool shank. These collets have no clamping range.

 

  • Collet bore is the exact tool diameter, with a square drive
  • Special design locks flat-sided tap shanks into the collet
  • Provides maximum concentricity, with positive driving force
  • Reduces tapping clearance requirements
Toolholder and Pull Stud specifications
Toolholder Maintenance