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Some bores do not get clean by spraying off the whole component.

Lance Technology

From the outside, an engine block or a gearbox housing is clean quickly. Inside, the residual contamination stays on in the bores — and that is exactly what is measured later.
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1 · The challenge

The channel is measured, not the surface

Here, surface methods come up against a simple limit: they treat the surface, not the channel — and that is where the residual contamination sits that is measured later.

Inside, an engine block or a gearbox housing is a channel system: many bores, through-holes, partly blind holes. Viewed from the outside, the part is clean quickly — inside, the residual contamination stays on in the channels.

2 · Engineering considerations

Targeted instead of over the surface

In lance technology, the process medium is guided in a targeted way into the individual bore instead of over the surface of the component. That shifts the action from the surface into the geometry — to where chips, oil and emulsion actually sit.

But targeted instead of over the surface also means: every lance has to fit the bore and hit it reliably. The lance arrangement is therefore designed for the specific component — it is not an accessory but part of the design engineering. If the component changes, the arrangement changes.

3 · Relation to other methods

Supplement, not replacement

Lance technology does not replace surface cleaning but supplements it: the surface is sprayed or flooded, the bores are lanced.

In practice that is often a combined process in the same system.

Spray cleaningFlood washing

4 · Where the method is used

The engine block as an example

Which machine type it becomes is decided by geometry, production volume, cycle time and cleaning requirement together.

The typical example is large engine blocks: depending on production volume and cycle, they are cleaned either in a chamber cleaning system with lance technology or in a continuous cleaning system.

Chamber Cleaning SystemsContinuous Cleaning SystemsCleaning methods at a glanceAutomotive industry

Questions and answers

Frequently asked questions about lance technology

What is lance technology and when is it used?

In lance technology, the process medium is guided in a targeted way into the individual bore instead of over the surface of the component. That shifts the action from the surface into the geometry. It is the answer to many bores, through-holes and partly blind holes — and it pays off where the same component runs in series and the bore positions are known.

How are cross-drilled holes cleaned?

Via targeted media routing instead of surface treatment. Every lance has to fit the bore and hit it reliably — the lance arrangement is therefore designed for the specific component and is part of the design engineering, not an accessory. If the component changes, the arrangement changes.

Why do chips remain in bores and cross-drilled holes?

Because surface methods treat the surface, not the channel. Viewed from the outside, the part is clean quickly — inside, the residual contamination stays on in the channels, and that is exactly what is measured later. The remedy is the targeted guiding of the process medium into the bore. If a burr additionally sits at the bore intersection, it is not a cleaning problem but a deburring problem.

Applications

Components on which this method is decided

4 worked-out tasks name lance technology as a possible method. What tips the balance in each of them is on its own page.

Each case sets out the design factors, the possible system concepts and the methods in detail — here you only find what it is about.

Cylinder head

The spray jet hits what it sees — and what it does not see only becomes visible in the residual contamination verification.

Hydraulic manifold

A hydraulic manifold is not only installed, it carries flow — what stays in the channel stays in the system.

Valve block

Blind holes and branching channels are exactly the places a spray jet does not reach: it hits what it sees.

Cross-drilled holes and blind holes

Blind holes and cross-drilled holes are exactly the places a spray jet does not reach: it hits what it sees.

None of these cases inevitably leads to lance technology. Which method it becomes arises from the interplay of the design factors — the method is the result of the system design, not its starting point.

All applications

Direct contact

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93186 Pettendorf
Pettendorf bei Regensburg
Phone+49 (0) 9409-777 3598
Fax +49 (0) 9409-777 3607
Emailinfo@itr-anlagenbau.com