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Apertures, 19.99 x 0.25mm, Tantalum

Apertures, 19.99 x 0.25mm, Tantalum

19.99mm dia, 0.25mm thick. Tantalum. High-quality disc apertures for use in electron microscopes, Focus Ion Beam, microprobe and X-ray systems.

All prices exclude VAT.

Description Tech Data

Product Description

We have a wide range of high-quality disc apertures for use in electron microscopes, Focus Ion Beam, microprobe and X-ray systems. These apertures are manufactured to tight tolerances with precision drilled holes. They are usually made from a platinum/iridium alloy 95:5% or molybdenum, although tantalum can be supplied for some applications. Platinum apertures can be made with hole sizes down to 5µm diameter whereas the smallest size for molybdenum is 10µm. We maintain a stock of all the regularly used aperture sizes with disc diameters and thicknesses to suit all current EM systems. We also have apertures for systems that are no longer manufactured but are still in use.

The apertures can also be used for non-electron microscopy applications where precision small holes are required for light optics, gas and liquid flow purposes.

Non-standard sizes can be supplied to special order.

Profile 'C'.

Technical Data

Tolerances
Disc diameter:	+0/-0.02mm
Thickness:	+0/-0.02mm
Hole size:	5 - 10µm: ±1µm
	11 - 70µm: ±2µm
	71 - 300µm: ±5µm
	301 - 1000µm: ±10µm
Capillary length:	1/2 hole diameter for 10 - 200µm
	<100µm for larger holes
Roundness of hole:	0.1µm for holes 5 - 10µm
	1µm for holes 11 - 200µm
	2µm for holes over 200µm
Centring of hole:	0.02mm for diameter up to 7mm
	0.03mm for diameter 7 - 30mm

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PRICE & AVAILABILITY: Please note that while we are working closely with our suppliers to minimise any global supply chain issues, prices and availability may be subject to change at short notice.