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Description

Boring Bar MDQNR/L 107.5°, Indexable Insert Holder

The MDQNR/L boring bar with a 107.5-degree approach angle is a highly rigid solution for process-reliable internal turning. Designed as a robust tool holder for standardised DN.. indexable carbide inserts, this boring bar provides the stability needed to machine deep bores and complex internal contours precisely and dimensionally accurately in high-volume series production. During internal turning, vibrations and physical tool deflection are the most common causes of chatter marks, dimensional deviations, and unusable components. Through an advanced quenching and hardening process, this internal turning holder achieves extreme bending rigidity. The integrated M-clamping system additionally secures the indexable carbide insert positively from above. This rigid clamping prevents micro-movements of the cutting edge even during heavy interrupted cuts and reliably protects against premature insert failure. For extremely small bore diameters, this massive boring bar is limited by its own shank diameter; it plays to its strengths in the medium to large bore range.

Economically, using this turning holder pays off through massively reduced scrap rates. The high impact resistance and chatter-free running noticeably extend the life of the indexable carbide inserts used, reducing direct tooling costs per component. Compatibility with common D-inserts (e.g. DNMG) minimises your setup times and stock levels. Stabilise your internal machining and rely on this hardened tool body for predictable machining processes without unplanned machine downtime.

Scope of delivery: 1 MDQNR/L boring bar (without indexable carbide insert) incl. washer, pin, clamp, screw, and wrench.

Note: The image shows the right-hand version (R).

MDQNR boring bar / internal turning tool / turning tool holder – detail view – product image
Properties
Application: For Internal Turning
Approach Angle: 107,5°
Clamping System: M
Internal Cooling: Without Internal Cooling
Material: Steel
Suitable for Inserts: DN..1104.., DN..1504.., DN..1506..
Type: MDQNR/L
Manufacturer information

Pflichtangaben gemäß GPSR Produktsicherheitsverordnung:

TILL TOOLS GmbH
Am Kebigsgraben 19
97616 Salz
Deutschland
E-Mail: info@tilltools.de

Reviews 11

11 of 11 reviews

Average rating of 4.82 out of 5 stars


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1 - 10 of 11 reviews

16 January 2026 16:23

Review with rating of 5 out of 5 stars

Hochsteife Bohrstange im Einsatz

Die Bohrstange macht auch bei flachen Konturen einen soliden Eindruck. Der Plattenwechsel schnell, die Klemmung fest.

7 November 2025 16:54

Review with rating of 5 out of 5 stars

Ordentlich verarbeitet

Hab den Drehhalter jetzt seit ein paar Wochen. Gleichmäßige Oberfläche, ruhiger Lauf. Kein nerviges Gequietsche wie bei manchen anderen Werkzeugen. Im Alltag spart das einiges an Nacharbeit. Was ich sagen kann: ich werde es auf jeden Fall weiter einsetzen. Mehr braucht es für meinen Einsatz nicht.

15 December 2024 21:31

Review with rating of 5 out of 5 stars

Auf der Okuma in Edelstahl

Habe die 107,5°-Bohrstange auf einer Okuma LB3000 für Innenkonturen in 1.4301 genutzt. Schneide bleibt sauber, Spanform passt, keine Vibration bei ordentlicher Zustellung. Die Verarbeitung wirkt hochwertig, Klemmung hält zuverlässig. Kann ich empfehlen.

30 November 2024 12:25

Review with rating of 5 out of 5 stars

DQ-Innenstange flach

Große Einstellwinkel für flachere Zugänge innen, solider Halter mit spielfreier Klemmung.

9 November 2024 08:47

Review with rating of 4 out of 5 stars

Hilft bei Hinterschnitten

der steile Winkel hilft bei Freistichen und die Bohrstange bleibt dabei sauber in der Linie. Passt genau für meine Arbeiten.

14 August 2024 11:48

Review with rating of 5 out of 5 stars

Bohrstange 107,5 Grad hochsteif

Die MDQNR-Bohrstange ist eine hochsteife Lösung für flache Innenkonturen, die Kraftaufnahme ist auch bei schwereren Spanquerschnitten stabil.

18 July 2024 13:14

Review with rating of 5 out of 5 stars

Spezialgeometrie für schwierige Innenkonturen

Die 107,5°-Winkelkombi ermöglicht Konturen, die in der normalen Werkzeugpalette fehlen. Bei einem Umbau-Auftrag war die Stange die Rettung, inzwischen fester Bestandteil des Arsenals. Platte wechselt sauber, Stange wirkt massiv verarbeitet und der Lauf bleibt ruhig.

13 April 2024 11:58

Review with rating of 5 out of 5 stars

Konturstarke Bohrstange mit 107,5 Grad

Die Bohrstange bringt extreme Konturzugänglichkeit, Platte bleibt auch bei spitzer Zustellung satt. Hab sie für ein Teil mit Hinterschnitt und komplizierter Innenkontur gebraucht, lief völlig problemlos. Preis-Leistung ist top in dem Bereich.

23 February 2024 01:47

Review with rating of 4 out of 5 stars

Steif genug für die meisten Fälle

Die Bohrstange ist steif und die Klemmung arbeitet gut. Bei besonders schwierigen Innenkonturen stößt sie an ihre Grenzen — was bei diesem Preis vertretbar ist. Für die üblichen Werkzeugbau-Anforderungen aber absolut passend.

30 December 2023 14:53

Review with rating of 5 out of 5 stars

Passt im Alltag

Gute Bohrstange, Verarbeitung sauber, Platte sitzt fest. Bin zufrieden.

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