We specialise in contracted deep hole drilling. We produce precise bores according to customer specifications in rolls, tubes, reel and gear shafts, permanent moulds , hydraulic cylinders and many others.
We also offer pre-turning, honing and sawing.
Individual orders per year
Customers per year
We process full material, tubes, square and hollow-forged workpieces.
The materials range comprises alloyed and unalloyed steels, case hardening and nitriding steels, stainless and special steels, etc.
Our customers profit from our decades of experience in these material range.
This procedure is suitable for removal of inner errors or reduction of wall thicknesses at a defined inner diameter.
Pull boring is also used for drilling out, e.g., stainless steel centrifugal casting tubes.
The drilling tool follows the present pipe centre in this procedure and enlarges the inner diameter while maintaining present wall thickness differences. We have 6 drilling machines available for pull boring.
Bore diameter: 50 – 300 mm
Bore depth: max. approx. 13,000 mm
The maximum workpiece length depends on the bore diameter.
We have up to 7 lathes to pre-turn. For delivered tubes or rolled or forged input material, it is often necessary to turn clamping and support points.
Up to a turning diameter of 500 mm, max. 8,000 mm workpiece length
Turning diameter 500 – 750 mm, max. 5,000 mm workpiece length
Max. workpiece weight approx. 4.5 t.
Sawing / Technical Altenatives
Depending on piece number, purpose and dimensions, it may be more cost-efficient to drill material in combined lengths and only saw the desired workpieces afterwards. We combine your order into efficient and cost-efficient processing.
Kilian GmbH & Co KG