Question 1

How do I choose a caliper or a micrometre for dimensional control?

Accepted Answer

The measuring range must comfortably cover the dimensions of the parts being checked (a 150mm caliper is sufficient for most small parts, an outside micrometre is chosen in 25mm intervals: 0-25, 25-50, etc.). The resolution and accuracy stated by the manufacturer (for example ±0.02mm) must be an order of magnitude finer than the tolerance of the part being checked. The digital version offers direct reading and data output, useful for quality control reports; the analogue version (with vernier or dial) remains more resistant to the harsh workshop environment and does not depend on a battery.

Question 2

Pneumatic or power tools - what do I choose for industrial maintenance?

Accepted Answer

Pneumatic tools are lighter, offer constant power regardless of duration of use and do not overheat under intensive work, but require a compressed air network at the workplace. Power tools (corded or cordless) are independent of the air installation and more flexible for interventions away from the workshop, but battery versions have limited autonomy and more variable power over time. For fixed workshops with a compressor already installed, pneumatic is often more efficient; for mobile interventions in the field, cordless electric wins.

Question 3

What does the accuracy class mean for dimensional measuring instruments?

Accepted Answer

The accuracy class defines the maximum permissible error of the instrument against a reference value, according to the DIN or ISO standards specific to each type of instrument (for example DIN 862 for calipers). A higher-class instrument costs more, but is mandatory where the tolerances of the checked part are tight - quality control in precision production, checking critical parts. For general maintenance, where tolerances are wider, a standard-class instrument is sufficient and reduces cost without compromising the control needed.

Question 4

How do I choose a welding inverter for the maintenance workshop?

Accepted Answer

The maximum welding current (Amperes) should be chosen according to the thickness of the materials most frequently welded - thick industrial plate needs higher currents than light repairs. The welding process (MMA with coated electrode, MIG/MAG with wire or precision TIG) depends on the base material and the quality of the joint required. The duty cycle, expressed as a percentage at a given current, shows how long the inverter can weld continuously before protecting itself thermally - an aspect often ignored, but essential for intensive work.

Question 5

What information do I send for a quotation for tools or measuring instruments?

Accepted Answer

For power or pneumatic tools, the exact application (type of material, frequency of use, working environment) helps us recommend the suitable model from Bosch, Makita or Hilti. For measuring instruments, we need the measuring range required, the accuracy class required and whether a calibration certificate is needed at delivery. For orders to equip a whole workshop, a list of all the tools needed allows a single quotation and consolidated delivery, simpler to receive at the tool store.

Question 6

How long does delivery of tools and measuring instruments take?

Accepted Answer

For usual power and pneumatic tools, the lead time is 24–72 h when the item is available locally or at the supplier. Higher-precision measuring instruments or complete tool sets for equipping a workshop, ordered specially, are made to order, usually 1–4 weeks; it can take longer depending on the brand and the specifications. For instruments that need a calibration certificate at delivery, add this time separately in your planning, because the verification is done before dispatch.

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