MAPAL offers a wide range of floating holders for reaming operations on lathes.

Porta-mandril flutuante

Para operações de mandrilagem no torno


Na usinagem fina de furos, a coincidência da pré-perfuração com o eixo de ferramenta é pré-requisito para o perfeito funcionamento do escareador. Quando da utilização de escareadores em tornos mecânicos, frequentemente é necessário compensar o erro do eixo entre o porta-ferramenta e o fuso a ser usinado. Este erro pode ser corrigido através do alinhamento da ferramenta na máquina ou por meio de um porta-mandril flutuante. Um porta-mandril flutuante é especialmente indicado quando o desvio é constantemente alterado devido ao aquecimento da máquina ou às diferentes posições dos ciclos do revólver. Os porta-mandris flutuantes da MAPAL garantem resultados otimizados na usinagem com altas velocidades e avanços elevados. 
Floating holders from MAPAL compensate the angular misalignment.

Floating holders

Os porta-mandris flutuantes da MAPAL compensam o deslocamento axial e angular entre o eixo da ferramenta e o furo a ser usinado. Assim são compensados erros de alinhamento e de concentricidade, se obtém qualidades de superfície otimizadas com altas velocidades de corte e segurança de processo, além de aumentar o tempo de vida útil das ferramentas.

A compensation floating holder from MAPAL.

Self-adjusting floating holders

Self-adjusting floating holders optimise the effectiveness on lathes and multiple spindle machines. All the advantages of the floating holder technology can be exploited.The self-adjusting floating holders make it possible to manually adjust tool adapters that are not central in relation to the rotating spindle and slide guides that do not run parallel to the spindle axis. 

​​​​​​​The radial play on the floating holder is further minimised. Radial run-out and alignment errors are compensated without vibration, long cutting times and tool lives are ensured. The integrated coolant supply guarantees an optimal supply of cooling lubricant to the reamer cutting edges. The spindle error can be adjusted directly via an easily accessible eccentric screw.

The picture shows a floating holder for multi-bladed reamers from MAPAL.

Floating holders for multi-bladed reamers

Floating holders have a significant weakness when used in conjunction with multi-bladed, high-performance reamers. Due to the function and the construction of the floating holder, when the tool initiates the cut at the beginning of the bore, a very low cutting speed must be selected initially. After the machining of the first few millimetres it is then possible to increase the cutting speed, depending on the material and conditions on the machine. 
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The mechanism inside the  floating holders for multi-bladed reamers is designed especially for machining using multi-bladed reamers so that the compensation direction, the floating path and the necessary force for deflection are optimal for a specific range of diameters and tools used in the holder. This exact matching is particularly important on starting the cut. As a result high cutting speeds are possible even at the start of the reaming operation.