Modular Tooling System Overview

This document presents a modular tooling system designed for quick change and high precision machining, compliant with DIN standards. The system includes a variety of components such as shell end mill arbors, stub arbors, drill chuck arbors, shell reamer arbors, reducer adapters, extensions, and adapters to ensure compatibility across different tooling standards.

Material Specifications

• Components are made from case-hardening alloy steel, which is case-hardened and tempered.
• Minimum core strength is 880 N/mm².
• Surface hardness ranges between HRC 57 and 60.

These material properties guarantee durability and wear resistance suitable for heavy-duty machining.

Component Types and Functions

• Shell End Mill Arbors: For milling cutters with longitudinal or transverse keyways (DIN 138), some models include coolant ports.
• Stub Arbors: Facilitate quick changes for milling cutters with longitudinal keyways.
• Drill Chuck Arbors: Adapt drill chucks compatible with DIN 238 or JACOBS standards.
• Shell Reamer Arbors: Holders designed for precision boring.
• Reducer Adapters: Adapt between different Morse taper sizes and modular tooling interfaces, including threaded or tang shank tools (DIN 228-A/B).
• Extensions and Reducing Adapters: Provide length and diameter adjustments.
• Adapters for LAIP Modular Tooling: Enable compatibility with other modular tooling systems.
• Front Contact Adapters: Designed for screw-in tools with internal coolant channels.
• Collet Chucks ER Type (DIN 6499): Available in standard and mini sizes for cylindrical straight shanks (DIN 1835-A).
• Micrometric Fine Boring Heads and Accessories: Include double cutter heads, insert holders, and reducing adapters for precision boring.
• Weldon-Whistle-Notch Holders: Secure clamping for milling cutters with Weldon or Whistle-Notch shanks.
• Quick-Change Tapping Chucks: Enable rapid tool changes for tapping operations.
• Tool Holder Blanks and Angular Positioning Rings: Semi-finished holders and rings to fix angular tool positions.

Standards and Norms

• Compliance with DIN standards: DIN 138 (keyways), DIN 228 (tool shanks), DIN 6499 (collet chucks), DIN 2079 (tool clamping holes).
• Precision requirements include circular deviation ≤ 0.008 mm between key dimensions to ensure concentricity and runout accuracy.

Assembly and Maintenance Recommendations

• Thorough cleaning and proper greasing of all components before assembly to ensure smooth operation and longevity.
• Use of pull studs or drawbars is mandatory for securing tools with threaded or tang shanks.

Product Identification and Ordering

• Components are identified by specific codes and dimensional parameters (diameters D, D1, D2; lengths L, L1, L2; thread sizes M).
• Availability and optional accessories are clearly indicated.
• Special features such as coolant channels, tapped holes for front clamping, and bearing shell nuts are noted.

Key Parameters and Limitations

• Material hardness and strength ensure suitability for heavy-duty machining.
• Dimensional tolerances and runout limits are critical for precision applications.
• Adapters and reducers facilitate compatibility across various tool shank standards and modular systems.

Best Practices

• Regular cleaning and lubrication before assembly.
• Careful selection of adapters and reducers matching tool shank types and sizes.
• Verification of dimensional compatibility and runout tolerances during setup.
• Use of angular positioning rings to ensure correct tool orientation.

Summary of Tables and Data

Detailed tables provide dimensions, codes, and availability for components such as arbors, adapters, collet chucks, and boring heads. Key data include dimensional parameters, material and hardness specs, DIN compatibility, and optional features like coolant ports and bearing nuts. These serve as essential references for component selection and ordering.

Micrometric Fine Boring Heads

Designed for bars with 1 mm shank diameter and fine boring ridges, these heads allow precise diametrical adjustments with minimal backlash: 0.01 mm diametrically and 0.002 mm via vernier scale. They include internal coolant supply for enhanced cooling.

Insert Holders

Sold separately, insert holders ensure rigid clamping of inserts to prevent interference with chip flow, critical for machining quality.

Double Cutter Heads

Optimized for roughing, these heads align inserts accurately to the boring center, maximizing productivity. Insert holders come in 90° and 70° angular configurations; the 70° holders enable full use of the rhombic insert’s four cutting edges, improving tool life and versatility. Insert holders and plates are not included and must be ordered separately.

Toolholder Specifications and Dimensions

Comprehensive dimensional tables specify diameters, lengths, and taper features compliant with DIN standards. Toolholders feature dual contact polygonal tapers and Morse tapers for quick-change modular tooling.

Accessories and Related Elements

• Special rings fix angular positions for precise tool alignment.
• Reducing adapters adapt micrometric fine boring heads to different sizes.
• Quick-change tapping chucks with axial compensation and release mechanisms improve tapping accuracy, especially for blind holes; compatible with BILZ system and include adapters.
• Weldon and Whistle-Notch holders secure end mills with cylindrical shanks (DIN 1835-B/E); holders for diameters ≥ 25 mm include two clamping holes for secure fixation.

Material and Hardness

Toolholder blanks have treated diameter and length zones with tensile strength around 700 N/mm²; other areas are cemented, hardened, and ground to 57-60 HRC. Custom dimensions are available on request.

Best Practices and Recommendations

• Ensure precise positioning and rigid clamping of inserts to avoid chip flow interference and maximize tool life.
• Use special rings to fix angular positions for repeatability and accuracy.
• Select appropriate insert holder angles (70° or 90°) to fully utilize insert cutting edges.
• Employ quick-change systems with axial compensation to improve tapping accuracy and ease, especially for blind hole threading.

Summary

The document provides detailed technical specifications, accessory options, and best practice guidelines for micrometric fine boring heads, double cutter heads, and related tooling components. Emphasis is placed on precision adjustment, rigid clamping, modularity, and DIN standard compatibility to optimize boring and tapping operations.