Telescopic Springs for Ball & Lead Screws

Telescopic springs, also known as spring guards or spiral springs, ensure the protection of ball screws, threads and guide columns against dirt, swarf, and mechanical damage.

  • Telescopic springs made of hardened high-grade spring steel ensure excellent protection against dirt, swarf and mechanical damage even when fully extended.  Available in stainless steel upon request.
  • Minimum overlap (of the individual windings) of 40%.
  • A special manufacturing method and optimal resilience ensure an easy compression and extension. Horizontal springs have a minimal sag and vertically used springs only a slight lateral deviation.
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Hennig Telescopic Spring For Machine Protection
Assembly and Maintenance

The minimum diameter of the take-up collar D3 must not be smaller than indicated. If the inside diameter of the take-up collar D3 is too small, or if the outside diameter of the centering flange D4 is too large, the spring will have a tendency to jam.

For horizontal applications, we recommend to install the springs with the large diameter nearest to the swarf accumulation area and for vertical applications, with the large diameter at the top. The maximum deflection in horizontal installations will be approx. 2 – 3% of the maximum mounting length.


What are telescopic springs?

Telescopic springs are designed to protect rotating machine parts such as shafts and spindles from dirt, chip, and  mechanical damage and to prevent accidents.

What are they made of?

Springs can either be made from blue carbon steel or from high-grade stainless steel. They are supplied with a light oil film which helps ensure frictionless operation.

When to use telescopic springs?

Telescopic springs are ideally used over rotating parts where there might be chips present or where dust and other particulates may be bound in coolant, oil, or liquid. Ideally they are designed for lower speed operation of up to 40m/min with an acceleration of less than 0.5g.

How are they mounted?

It is important to specify whether the spring is used in a horizontal or vertical orientation as the springs are wound differently. You can mount them over end or, in some cases, wind them over a shaft in a retrofit situation (special installation instructions available). Centering flanges (also known as pilots and retainers) can be used as optional accessories.

Are there standard sizes?

Absolutely there are. We have approximately 1200 standard sizes available. Sizes that aren’t standard may still be offered as long as they meet the criteria. If you have particular sizes we would offer the nearest standard size first before looking into the exact sizes.

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