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ExpaBolt

Fast positive and non-positive connections for blind holes

SCHAAF is leading the way with ExpaBolt bolts in order to revolutionize detachable flange connections of propulsion shafts of the shipbuilding industry. Not only are the bolts 100% non-positive and form fitting, which transfers high torque, but even after high stress they can be easily disassembled and reused. The bending and rotating resistant connection absorbed shock like changes of revolutions, torque as well as turning direction dependently. The system is made of heat treated steel, which is a safety plus during torque transfer. The safety factor in comparison to regular screws is 5. ExpaBolt is easy to handle since all tools and hydraulic high-pressure pumps for assembly and disassembly are adjusted to the system. ExpaBolt is certified by well-known buyers.
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Advantages

ExpaBolt offers the following advantages over normal connections:
  • Fast radial and axial bracing for components that have to absorb torques / shear force, axial force and / or bending moments
  • 100% positive locking and frictional connection all the time after mounting, no slipping between the flanges
  • Simple and quick installation and removal of ExpaBolt even after years of use – nearly unlimited times
  • Reusable after removal, again and again – no sparebolts required
  • Torsionally and flexurally rigid connection even with sudden changes in the rotational speed, the torque, direction of rotation or direction of load
  • No jammed or oversized bolts any longer
  • High torque transmission, completely free from backlash

Overview ExpaTen

The ideal connecting bolt

Perfect flange connection for high-speed turbines

Quick form and force fit connections with detachable axial tensioning system (Quick Locking).
Optimal flange connection in case of non-aligned flange bores and / or bore diameters that are not the same.
Fast positive and non-positive connections for blind holes
ExpaTen Speziallösungen

Versions

The standard version of the SCHAAF ExpaBolt comprises the following components:
  • Tapered Bolt and Conical Sleeve of high-strength quenched and tempered steel for maximum shear strength and axial load capacity
  • Two ultra-high-strength Round Nuts
  • Fine thread for maximum fatigue strength
  • Pressure connection bore and pressure distribution grooves on the taper for easy removal of the Tapered Bolt
Wind energy

Areas of Application

SCHAAF ExpaBolt is the optimum solution wherever high forces (torques) must be transmitted and, at the same time, easy removal must be ensured. For example ship drive shafts, powerplants, crushers, steel and non steel mills and windturbines.
Qualität

Quality Assurance

All ExpaBolt Bolts are checked for material quality, dimensional accuracy, correct functioning and load-resistance. During order execution, they are subject to continuous quality assurance measures and are supplied together with detailed technical documentation.

Serviceleistung

Services

ExpaBolt are, of course, supplied packaged, ready for installation and use. SCHAAF ExpaBolt are user-friendly, reliable, and manufactured in accordance with the highest level of technical know-how. Our highly-motivated staff would be pleased to train your personnel, in situ or at our works, in mounting and dismantling the bolts.

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Hydraulic high-pressure accessories specially adapted to the function.

MEDIA AND MORE

Print / Animation
Read all the information.
References
View completed and released projects on SSV.
Online Meeting / Webinar
Register for a free online presentation on this product.

Industry-specific special solutions:

All SCHAAF products offer an individual solution for every industry.

ExpaBolt proves particularly effective for:

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