Collet Assembly
Collets are used with Expanding Mandrels or with Arrangements for Contracting. Expanding & Contracting arrangement for collets consists of several integrated parts which makes it a total self-operative unit. Depending upon the nature of operation to be performed on the work piece, the expansion or contraction is achieved through a inter-related series of parts like drawbars, expander / contractor housing, face plates, clamps, job rest pads, spring loads, centers, sleeves, segmented taper wedges, locking pins etc.
Designed in terms of metallurgy & geometry considering the type of machining operation and expected force generation on the work piece. For Eg:In a grinding collet, where a repetitive collar grinding operation is done, the geometry of collet assembly is critically and skillfully controlled so that each job is located and clamped by the collet in same position within accuracy in microns, thereby saving time in machine setting achieving higher productivity & uniform quality.
Expanding Mandrel :
Expanding Type Collet Assembly comes with a variety of Expanding mechanisms like :
Face Plate Operated Drawbar
Spigot Operated Drawbar
Between Center Taper Mandrel
Nut Operated Face Plate
Spring Pushed Segmented Pieces on Taper Expander Mandrel etc.
All components of the expansion mechanism are finely tuned to produce high-precision concentric expansion along the datum line of the machine. Metallurgical control ensures optimum elasticity.
Contracting Sleeve :
This is a type of Collet Assembly which is used for working on Shaft-Type work pieces, as compared to Expanding Type Collet Assemblies, which is used for holding Work-pieces with bores.
The mechanism is so designed to pull the contracting collet backward with the help of springs, spacers, contractor housing, contracting collet. Center is provided to support the non-working end of the work-piece. Differential hardness is produced on the collet considering the nature of the machining operation to be performed.
Collets
High Speed, Automated & Accurate Production machines require Quick and Automatic work-holding/tool-holding with High Accuracy and Sufficient Power to resist cutting or grinding forces. Tool room Brand Collets made with best metallurgy & geometry produce the firmest and high-precision work-holding and tool-holding for a variety of machining operations. Each and every step of collet making goes through Stringent Manufacturing & Inspection Drills to ensure Finest Concentricity, Angular Measurement, Surface Finish and Metallurgical Structure.
No wonder that, today, Tool Room Engineers LLP has earned the honor of manufacturing collets for many of the biggest Automobile Original Equipment Manufacturers and their ancillaries. With its highly skilled and dedicated work force and high accuracy machine tools, Tool Room Engineers LLP strives tirelessly to push the horizons of collet technology. Further, Collet Technology has also been developed to hold work-pieces with Spline Bore.
Expanding & Contracting Collet :
These are used for Job Holding in Advanced CNC operated Machines for :
• Turning
• Drilling/Reaming/Tapping
• Hobbing
• Shaving
• Grinding
• Gear Cone Polishing
• Gear Cone Hard Turning
• Honing
• Balancing
• Straightening
Tool Holding Collet :
These are used for Holding & Quick Changing Cutting Tools like Drills, Reamers & Taps
Double Angle Collet :
This is a special type high precision collet for double gripping of tools to prevent overhanging. This product requires extreme geometrical accuracy in terms of concentricity, finest surface finish along with a highly wear resistant metallurgical structure. Prevention of tool overhang increases tool life, accuracy and surface finish in machining.
For longer life, these collets are also available in special hard facing coated variety.
Ultra Precision Collet for VMC’s:
Collet Designation : ER8 , ER11, ER16, ER20, ER25, ER32, ER40, ER50