Accessories for blocks

Absolutely not! Standard pulleys are usually fitted with plastic sheaves designed for use with rope.

The steel wires contained in wire ropes place significantly greater demands on the material of the sheave. Plastic sheaves cannot withstand this stress and would be damaged. Therefore, only pulleys specifically designed for wire ropes should be used.

Yes, Sprenger blocks are generally designed and suitable for use in salt water.

However, slight rusting may occur in isolated cases, particularly around the rivets and in the vicinity of the riveted areas. Whilst this cannot be completely prevented from a technical point of view, it does not affect the quality or function of the block.

These are minimal, superficial residues or deposits left by machining tools. This slight ‘rust’ affects only the surface and can be easily removed.

The safe working load describes the maximum load to which a block may be subjected continuously during normal operation without causing damage or impairing its operational capability.

The breaking load, on the other hand, denotes the load limit at which the component fails – that is, breaks or ceases to function entirely.

As a general rule, we recommend a safety factor of at least four.

Example:

If a breaking load of 1,000 kg is specified in the catalogue, this results in a permissible working load of 250 kg (1,000 kg ÷ 4).

This fourfold safety margin is standard practice in the chain industry. In practical terms, this means that if a breaking load of, for example, 1,000 kg is determined, 50 per cent of this value – i.e. 500 kg – is set as the test load. No permanent deformation must occur under this test load. The safe working load is then half the test load, and is therefore 250 kg.

All Sprenger products bear the HS-Germany stamp, the manufacturer’s official logo. This mark serves as a distinguishing feature and stands for ‘Made in Germany’ quality .