Frequently Asked Questions
What is the usual operating air pressure for the hand held air tools?
Operating air pressures for hand-held pneumatic tools vary from 4 to 7 bar. Some down-the-hole hammers can handle air pressures up to 20 bar. To learn the appropriate operating air pressure for your product, consult the manual supplied with the tool, or the product section of the website.
What kind of oil do you recommend for lubricating the air tools?
LR oilers or the SOOR 6 unit is recommended for pneumatic tools without a built-in automatic oiler. For lubricating the tools, use ecological oils such as BP BIOHYD SE 46, ÖMV BIOHYD M 32, TOTAL HYDROBIO 46, TopOil BIO UNI, or other kinds of mineral engine oils (Pneumat 46) with the appropriate viscosity depending on the temperature and the tool used.
Do not use hydraulic oils or unstabilized coleseed oils for lubrication.
Do not use ecological oils for conservation.
How do you sharpen drill bit buttons?
Regrind buttons back to their original shape when the flat width exceeds 1/3 or 1/2 of the diameter of the button as a result of wear. Regrind buttons at least once every 400 metres of drilling in weaker rocks – even if they look seemingly untouched. This is to prevent thermal cracking of buttons also known as 'snake skin' that later results in fragmentation of the buttons.
Regrinding is done using a special pneumatic hand-held grinder with diamond grinding wheels. Grinding can be done either axially or radially. Grinding wheels and diamond cups can be used to restore the shape of buttons. Diamond cup grinders can be used to grind the steel base and expose buttons in the face of the bit. Peripheral buttons of a properly grinded drill bit must overshoot the bit body by cca. 0.5 – 1 mm. To achieve this, regrind the bit body when necessary. For more information, consult the operation manuals for Down-the-hole hammers or drilling bits supplied with the product, or see the product section of the website.