FAQs

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All displayed prices are the C. & E. FEIN GmbH recommended retail prices (MSRP) and are subject to applicable sales tax. The invoice amount is determined by the prices applicable on the day of shipment. Subject to transmission errors and changes in technology, design and appearance.

After the spare parts catalog starts you will see below left when the catalog was last updated (see example).

Attention should always be paid to good lubrication when drilling. The best results are achieved by use of internal cooling via the core drilling machine and standard drilling emulsion.

• Check whether the core bit teeth are still sharp.
• The guides must be installed on the machine without play. If this is not the case, please send your machine to FEIN customer service.
• Carefully increase the speed force until the chattering is reduced. Warning: The machine may tilt under excessive speed force.

• Check whether the core bit teeth are still sharp.
• The guides must be installed on the machine without play. If this is not the case, please send your machine to FEIN customer service.
• Reduce the feed force.

• The surface where the machine is positioned must be clean and free of scale.
• The magnetic base must make full contact with the material to be drilled.
• The material to be drilled must be at least 12 mm thick and magnetizable

• the magnetic holding power is not guaranteed.
• the machine can shift on the material to be drilled.
• The teeth could break or the bit could separate from the shaft.

In this case, the vacuum plate and vacuum pump must be used. These items are described in the catalog.

• To meet the center of the hole exactly.
• To eject the bore core.

• Carefully position the drill and preferably drill through in one operation.
• Do not switch off the machine during the drilling process because the teeth could break off.
• Before the bit is withdrawn from an incomplete hole, allow the machine to run briefly on the hole bottom without cutting. This breaks the chips at the bottom of the hole.
• Always remove the bit from the hole while the machine is turning clockwise

Turn off the drill. Carefully remove the core bit by rotating clockwise with an open-ended wrench.

• In the proximity of weld seams or flame cuts, structural changes can occur due to the high temperatures. This can make the core bit wear out very quickly.
• With overlapping holes, the core bit can hook into the transition between the existing and new holes. This could result in broken teeth.

• Transportation and storage of the core drill should only be done in the original packaging or the designated location in the shipping case.
• Core bits should be protected from impact or the teeth can become dull or break off.

NiCad / NiMH batteries should only be stored over longer periods in fully-charged condition. Due to self-discharge, recharging is required at least every 3 months. Lithium ion batteries should not be stored either empty or fully charged for long periods. The ideal storage, determined by exhaustive tasks, takes place with 40 to 50% capacity at low temperatures, but not under 0° C. Storage between 5°C and 10°C is ideal. Due to self-discharge, recharging is required at least every 12 months.

Yes. Even in switched-off equipment, a small current can flow that, after a long period, leads to a deep discharge, damaging the battery and possibly destroying it in extreme cases.

A NiCad/NiMH battery in unused condition loses between 60 and 80% of its charge in 3 months due to self-discharge. With lithium-ion batteries the charge loss is 3 to 5% per month. The self-discharge is temperature-dependent and greater at high temperatures. Room temperature is ideal.

Deep discharge means draining a battery until absolutely no more current is delivered. In the process, the voltage sinks to 0 Volts. If this condition is maintained, chemical reactions take place on the electrodes that make the battery partially to totally unusable. The result is a massive battery capacity loss and, in extreme cases, it can no longer be charged. For this reason batteries should not be drained below a discharge termination voltage that depends on the type and then recharged as quickly as possible. Basically, lithium-ion and lithium-ion-polymer batteries should not be completely discharged. As a rule of thumb, lithium-ion and lithium-ion-polymer batteries should be recharged when 10 to 20% capacity remains. Basically, good lithium-ion batteries have built-in protection and monitoring switches that prevent deep discharging, overcharging and possibly an explosion.

NiMH batteries are not suitable for use at temperatures below 0°C. Near the freezing point, they already display a definite loss of capacity and below about -10°C they become completely unusable. NiCad batteries are suitable for use down to -10° C. Use of lithium ion batteries is possible in a temperature range from -10°C to +55°C however, charging should take place at n battery temperature of +5 to +45°C. The ideal temperature for the batteries is room temperature. A temperature sensor in the battery ensures that no rapid charging takes place outside this range.

NiMH batteries can be charged between 400 and 700- times, NiCad batteries between 500 and 1000 times and lithium-ion batteries up to 1000 times (depending on capacity). However, these values are only achieved under ideal conditions. Depending upon handling and care of the batteries, the number of cycles may also be reduced. The capacity declines during the service life. Generally batteries that are under 70% of nominal capacity are considered worn out.

The battery recognizes how heavily it is used. If the battery is not completely drained before charging, small crystals form on the electrodes and reduce the ability to accept a charge. So if your battery is not completely discharged several times in a row, the standby times keep getting shorter. With NiMH technology a lazy battery effect similar to the classic memory effect can occur. Lithium-ion and lithium-ion-polymer batteries may be recharged at any time. These batteries have no memory effect, however, frequent partial charges should be avoided. Full charging in several stages - with or without partial discharge between - also does no harm. But lithium-ion and lithium-ion-polymer batteries should not be completely discharged. As a rule of thumb, lithium-ion and lithium-ion-polymer batteries should be recharged when 10 to 20% capacity remains. With lithium ion batteries it is also not necessary to charge and discharge a new battery several times so it can reach maximum capacity. If the initial charge is carried out correctly, the battery possesses maximum capacity from the first day. Inserting and removing a full battery from the charger does not lead to a higher charge but instead causes damage.

If the capacity of the NiCad battery declines over time it can be revived: Completely drain (no deep discharge!) the NiCad battery (under load), completely charge, and repeat this procedure several times. The performance will improve again with each repetition. Refreshing equipment is required for NiMH batteries.

Durable, high quality repair of batteries is not possible. Even though third parties claim that they can repair batteries cheaply, the impact is short-lived, since the new cells are not compatible with existing components. FEIN and its distributors offer long-term quality. Basically, defective batteries are exchanged.

• The first charging cycle is decisive. Charge the battery completely before the first use.
• Every battery has only a limited number of charging cycles. Therefore, do not recharge the battery at every opportunity but always use it until it is almost exhausted (between 10 and 20% charge).
• If the battery is discharged below its nominal voltage, this can lead to processes that damage or destroy the battery. The FEIN batteries therefore have electronics that warn the user and switch off the tool before such a deep discharge can happen.
• frequent overcharging can also permanently damage the battery. So the charger automatically terminates the charging process as soon as the battery is fully charged. Do not force the charger to supposedly pump more charge into the battery by repeatedly switching it on and off! That does not lead to a higher charge but instead causes damage!
• Charging should generally only be done at room temperature (approximately 18 - 21° centigrade). Avoid charging a cold battery. This damages the cells. Always allow the battery to first reach room temperature, especially during cold outdoor temperatures in winter, and then charge it.
• High temperatures also damage the battery. Never leave the battery or, even better, the entire tool case in the car or in direct sun on hot, sunny days. At temperatures over 60°C the lithium-ion battery permanently loses capacity.
• Lithium ion batteries should not be stored either empty or fully charged for long periods. The ideal storage, determined by exhaustive tasks, takes place with 40 to 50% capacity at low temperatures, but not under 0° C. Storage between 5°C and 10°C is ideal. Due to self discharge, recharging is required at least every 12 months.
• An unused battery should be kept cool but not cold. Even in unused condition, the batteries lose energy. The lithium-ion battery loses about 3 to 5% monthly.
• If a lithium-ion battery is not used for a long period, it should be recharged after 12 months at the latest, otherwise it will be irreparably damaged.
• Naturally, old used batteries must be disposed of in an environmentally compatible manner.