---
title: "Horizontal Boring Mill Machining"
description: "3 CNC horizontal boring mills TOS WHN 13 with rotary table: boring, milling, line boring up to Ø 130 mm spindle – boring mill contract manufacturing, Lorch."
url: "https://bock-gmbh.com/en/services/cnc-horizontal-boring-mill/"
language: "en"
index: "https://bock-gmbh.com/en/llms.txt"
---

# Horizontal Boring Mill – CNC Boring Mill Machining for Large Parts | Contract Manufacturing Lorch

Three CNC horizontal boring mills TOS-Varnsdorf WHN 13 with rotary table – boring, milling, line boring and thread cutting of large workpieces in a single setup, as contract manufacturing in Lorch with no minimum order quantities.
Travel paths X 3,500 · Y 2,500 · Z 1,200 mm – large working envelope for long bores and widely spaced machining positions.
Powerful 130 mm boring spindle for boring, line boring and milling – even on deep bores and large metal removal volumes.
Integrated rotary table – several machining faces in a single setup, without re-clamping and without positional errors.
Three identical TOS-Varnsdorf WHN 13 CNC – high capacity, short lead times and redundancy for on-time delivery.
2×25 t crane system and hall infrastructure for safe handling of large-format workpieces.
Structural steel, fine-grain structural steel to S1100, Hardox 400/500 and stainless steel 1.4301/1.4571 – machined to drawing.

## Horizontal Boring Mill – What Boring Mill Machining Delivers

A horizontal boring mill machines workpieces with a horizontally arranged boring spindle. The three CNC boring mills TOS-Varnsdorf WHN 13 combine boring, milling, line boring, facing and thread cutting in a single machine – ideal for components with precise bores, fit bores and positional references over large distances.
The powerful boring spindle with Ø 130 mm and travel paths of 3,500 × 2,500 × 1,200 mm open up a generous working envelope. Combined with the rotary table, several workpiece faces are machined in a single setup – this minimises re-clamping errors and ensures tight positional tolerances between bores and surfaces.
Three identical machines mean genuine capacity: parallel production of multiple orders, short lead times and redundancy for time-critical projects. Programming is based on CAD data or drawing dimensions – single parts, prototypes and small batches alike, as contract manufacturing with no minimum order quantities.
The machinery at Bock is strategically set up: equipment and tools are selected so that almost any component can be machined and every customer requirement met individually and in the best possible way. Which machine processes your part is determined by your specification – this allocation is part of our manufacturing know-how and takes the selection entirely off your hands.
After boring mill machining, components can be passed directly on to welding, shot blasting and painting – all within the same manufacturing facility in Lorch. External logistics between the machining steps are eliminated, noticeably reducing lead times and overall costs.
CNC Machinery Overview
Why machine several sides in one setup? Explore how a boring mill works, the differences between its main types and the features that guide machine selection. What is a boring mill? →

## Machine Data – TOS-Varnsdorf WHN 13 CNC

Core data of the three identical CNC horizontal boring mills in contract manufacturing at Bock:
| Parameter | TOS-Varnsdorf WHN 13 CNC |
| Number of machines | 3 (parallel capacity, identical) |
| Boring spindle diameter | Ø 130 mm |
| Travel path X (transverse) | 3,500 mm |
| Travel path Y (vertical) | 2,500 mm |
| Travel path Z (longitudinal) | 1,200 mm |
| Rotary table | 360° rotatable – multi-face machining in a single setup |
| Machining operations | Boring · milling · line boring · facing · thread cutting |
| Control | Heidenhain iTNC 530 |
The stated travel paths refer to the machines at the Lorch plant. Which machine processes your component is allocated to match your requirements. We verify specific feasibility and tolerances on a project basis from your drawing.
Machinery Overview

## Typical Applications of Boring Mill Machining

The horizontal boring mills at Bock are used for:
- Housings, bearing blocks and consoles with precise fit bores
- Welded assemblies with aligned bores and bearing bores
- Base plates, frames and cross members with bore patterns over large distances
- Components for plant, vehicle and special machinery engineering
- Pre-machined blanks as a manufacturing stage for welded structures
Machined components can be welded, blasted and painted in the same facility. For particularly long or large-surface parts, portal milling and travelling-column machines up to 26,000 mm are additionally available – you receive the complete machining and manufacturing spectrum from a single source, without external logistics between the machining steps. Quality documentation and dimensional reports to DIN EN ISO 9001:2015 are available as standard.
CNC Large-Part Machining

## Materials for Boring Mill Machining

Bock uses predominantly European quality steels:
- Structural steel S235, S355 – Standard structural steel
- Fine-grained structural steel up to S1100 – high-strength, weldable
- Hardox 400 / 500 – wear-resistant steel for high-stress components
- Stainless steel 1.4301, 1.4571 – corrosion-resistant
- Special steels to drawing and customer specification
Material certificates are provided on request or according to project requirements.
Services Overview Contract Manufacturing and Steel Construction

## Impressions from Boring Mill Machining

Real shots from our shop floor in Lorch – from the TOS-Varnsdorf WHN 13 with the workpiece clamped on the table, through the bored fitting hole with its shoulder and the machine housing whose fitting bores line up in two rows, to the primed small batch on the pallet.
More from our production: Milling & Boring · 26 images

## Boring Mill Machining at Bock – Your Advantages

Bock Maschinenbau operates the horizontal boring mills as part of a complete manufacturing process:
- 3 boring mills in parallel
- Three identical TOS-Varnsdorf WHN 13 CNC – capacity, short lead times and redundancy.
- Rotary table 360°
- Multi-face machining in a single setup – without re-clamping errors, with tight positional tolerances.
- Crane handling up to 50 t
- 2×25 t crane and hall infrastructure for large-format workpieces.
- Contract manufacturing, no minimum order
- Single parts, prototypes and series parts are all manufactured to drawing alike.
- DIN EN ISO 9001:2015
- Quality management with documented material traceability and complete traceability.
- Tool arsenal built over decades
- A stock of special tools grown over the years – long boring and back-boring bars, special drills and thread-cutting tools for deep bores and line-bored bearing seats.
Boring and boring-mill machining for tool, fixture and machine builders from the Stuttgart area and the entire DACH region – reliably from Lorch.
All Services Overview

## Frequently Asked Questions on Boring Mill Machining

### What is a horizontal boring mill?

URL: https://bock-gmbh.com/en/services/cnc-horizontal-boring-mill/#faq-horizontalbohrwerk

A horizontal boring mill machines workpieces with a horizontally arranged boring spindle. It combines boring, line boring, milling, facing and thread cutting in a single machine – ideal for precise bores and positional references on large components.
Complete Machinery

### How large may the components be?

URL: https://bock-gmbh.com/en/services/cnc-horizontal-boring-mill/#faq-gross-bauteile-sein

The travel paths of the TOS-Varnsdorf WHN 13 CNC are X 3,500 · Y 2,500 · Z 1,200 mm. Which machine processes your component we match to your requirements – for particularly long or large-format parts, portal milling and travelling-column machines up to 26,000 mm are additionally available. This way, every component finds the right machine.
Portal Milling and Boring Mill

### Which materials are machined?

URL: https://bock-gmbh.com/en/services/cnc-horizontal-boring-mill/#faq-werkstoffe-bearbeitet

Structural steel S235/S355, fine-grain structural steel to S1100, Hardox 400/500 as well as stainless steel 1.4301/1.4571 and special steels to drawing. We provide material certificates on a project basis.

### Do you also manufacture single parts?

URL: https://bock-gmbh.com/en/services/cnc-horizontal-boring-mill/#faq-fertigen-einzelteile

Yes. Boring mill machining is carried out as contract manufacturing with no minimum order quantities – single parts, prototypes and small batches alike, programmed from CAD data or drawing dimensions.
Insights into Production and Machinery

### Can the parts be further processed at your facility?

URL: https://bock-gmbh.com/en/services/cnc-horizontal-boring-mill/#faq-teile-weiterverarbeitet

Yes. After boring mill machining, welding, shot blasting and painting follow in the same facility in Lorch – complete manufacturing from a single source without external logistics.
Welded Assemblies and Complete Manufacturing

## CNC Machinist – Milling & Boring Mill (m/f/d)

CNC Machinist – Milling & Boring Mill (m/f/d) — As a CNC Machinist (m/f/d), you will mill, drill and line-bore large components up to 26 m in length and 50 t in unit weight – on two gantry milling machines, a travelling-column milling centre and three horizontal boring mills at our site in 73547 Lorch, Ostalbkreis, near Schwäbisch Gmünd.

## Request Boring Mill Machining

Send us the drawing with hole pattern, fits, material and quantity. We drill, mill and bore in a single setup – ordered on its own or as part of complete manufacturing.

### Alexander Schulz

For new enquiries, quotations and technical questions on the feasibility of your project.

### Jochen Hack