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ExpaTen 2

Ideal flange connection for misaligned flange bores and / or unequal bore diameters

ExpaTen 2 is the further development of ExpaTen. This newly designed bolt can – thanks to separately adjustable conical sleeves – also be used for more pronounced offsets between the flange bores or if the bore diameters of the flange connection differ significantly. In this way, SCHAAF ExpaTen enable an optimal connection even in difficult cases.


ExpaTen 2 is the further development of ExpaTen and thus offers all the advantages for the ideal flange connection and additionally:

  • Adjustment of position errors of bores up to 2 mm
  • Adjustment of diameter tolerances of bores up to 0.5 mm
  • No need for combined bore adaption of both flange bores when mounting
  • Cost-saving due to reduced mounting and dismounting time
  • Simple and quick installation and removal of ExpaTen 2, as well, even after years of use – nearly unlimited times
  • Reusable after removal, again and again is also warranted with ExpaTen 2 – no sparebolts required
  • 100 % positive and frictional locking at all times after assembly, no slippage of the flanges
  • Easy and quick installation and removal of ExpaTen even after years of use – almost unlimited number of times
  • Reusable after removal, repeatedly and without the need for replacement bolts
  • Torsionally and flexurally rigid connection even with shock-like changes in speed, torque or rotational and load direction
  • No more jammed or oversized bolts

Overview ExpaTen

The Perfect Fastening Bolt

Perfect flange connection for high-speed turbines

Quick form and force fit connections with detachable axial tensioning system (Quick Locking).

Ideal flange connection for misaligned flange bores and / or unequal bore diameters

for flange-component connection

ExpaTen Speziallösungen


The standard version of the SCHAAF ExpaTen 2 comprises the following

  • 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
  • Protective caps in various designs and materials

Areas of Application

SCHAAF ExpaTen 2 is the optimum solution wherever flange bores can or shall not be refinished and a centric misalignment or a bore diameter differnce is given. A 100 % positive locking is achieved e. g. with ship drive shafts, powerplants, crushers, steel and non steel mills and windturbines.


Quality Assurance

All ExpaTen 2 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.



ExpaTen 2 Bolts are, of course, supplied packaged, ready for installation and use.

SCHAAF ExpaTen 2 Bolts 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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Industry-specific special solutions:

All SCHAAF products offer an individual solution for every industry.

ExpaTen 2 proves particularly effective for:

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