The weight of the BLACK & DECKER STC1840 is 2.5 kg.
This cordless trimmer remains very lightweight and easy to handle, making it an ideal tool for prolonged use without excessive fatigue. This weight includes the fully charged 18V battery.
Find the device manual for free STC1840 BLACK & DECKER in PDF.
| Brand | Black & Decker |
| Model | STC1840 |
| Product type | Cordless string trimmer / brush cutter |
| Power source | 18V Li-Ion battery (included) |
| Battery capacity | 4.0 Ah |
| No-load speed | 5500 – 7200 rpm |
| Weight (with battery) | 2.85 kg |
| Line diameter | 1.65 mm (0.065 inch) – round nylon monofilament |
| Exposed line length | 11 cm max |
| Telescopic | Yes, height adjustable |
| Auxiliary handle | Yes, adjustable |
| Edging guide wheel | Yes |
| Trimming and edging mode | Yes, by rotating the head |
| Guard | With line cutting blade |
| Sound pressure level | 93 dB(A) |
| Sound power level | 90 dB(A) |
| Vibration (hand/arm) | 9.0 m/s² (K uncertainty = 1.5 m/s²) |
| Charger | Model 90571352, input 100-240 V~, output 8-20 V |
| Warranty | 24 months |
| Intended use | Domestic |
1 question about this device. Answer the ones you know or ask your own.
The weight of the BLACK & DECKER STC1840 is 2.5 kg.
This cordless trimmer remains very lightweight and easy to handle, making it an ideal tool for prolonged use without excessive fatigue. This weight includes the fully charged 18V battery.
Download the instructions for your Brush cutter in PDF format for free! Find your manual STC1840 - BLACK & DECKER and take your electronic device back in hand. On this page are published all the documents necessary for the use of your device. STC1840 by BLACK & DECKER.
Your BLACK+DECKER trimmer has been designed for trimming and finishing lawn edges and to cut grass in confined spaces. This appliance is intended for consumer use only.
Warning! When using mains-powered appliances, basic safety precautions, including the following, should always be followed to reduce the risk of fire, electric shock, personal injury and material damage.
Warning! When using the machine the safety rules must be followed. For your own safety and bystanders please read these instructions before operating the machine. Please keep the instructions safe for later use.
Always take care when using the appliance.
Always use safety glasses or goggles.
- Never allow children or people unfamiliar with the instructions to use the appliance.
Additional residual risks may arise when using the tool which may not be included in the enclosed safety warnings. These risks can arise from misuse, prolonged use etc.
Even with the application of the relevant safety regulations and the implementation of safety devices, certain residual risks can not be avoided. These include:
Injuries caused by touching any rotating/moving parts.
Injuries caused when changing any parts, blades or accessories.
Injuries caused by prolonged use of a tool. When using any tool for prolonged periods ensure you take regular breaks.
Impairment of hearing.
Health hazards caused by breathing dust developed when using your tool (example:- working with wood, especially oak, beech and MDF.)
Warning! Cutting elements continue to rotate after the motor is switched off.
Before using the appliance, check that your cutting path is free from sticks, stones, wire and any other obstacles.
Only use the appliance in the upright position, with the cutting line near the ground. Never switch the appliance on in any other position.
Never operate the appliance with damaged guards or without guards in place.
Take care against injury from any device fitted for trimming the filament line length. After extending new cutter line always return the machine to its normal operating position before switching on.
Always ensure that the ventilation slots are kept clear of debris.
Never attempt to open for any reason.
Do not expose the battery to water.
- Do not store in locations where the temperature may exceed 40^ C .
- Charge only at ambient temperatures between 10^ C and 40^ C .
Charge only using the charger provided with the tool.
- When disposing of batteries, follow the instructions given in the section "Protecting the environment".
Use your BLACK+DECKER charger only to charge the battery in the tool with which it was supplied. Other batteries could burst, causing personal injury and damage.

The charger is intended for indoor use only.

Read the instruction manual before use.

Your charger is double insulated; therefore no earth wire is required. Always check that the mains voltage corresponds to the voltage on the rating plate. Never attempt to replace the charger unit with a regular mains plug.
The following warning symbols are found on the appliance:

Read the manual prior to operation.

Wear safety glasses or goggles when operating this appliance.

Wear suitable ear protectors when operating this appliance.

Always remove the plug from the socket before inspecting a damaged cable. Be careful not to use your strimmer if the cable is damaged.

Beware of flying objects. Keep bystanders away from the cutting area.

Do not expose the appliance to rain or high humidity.

Directive 2000/14/EC guaranteed sound power.
This appliance includes some or all of the following features.
Warning! Before assembly, make sure that the tool is switched off and the battery has been removed.
Turn the trimmer upside down so that you are looking down at the spool cap (9).
Remove the screw from the guard with a phillips screwdriver.
Turn the guard (8) upside down and slide it fully onto the motor housing (6). Make sure the tabs (10) on the guard engage the ribs (11) on the motor housing as shown in figure D. The locking tab (25) should have snapped into the housing slot (26)
Continue to slide the guard on until you hear it "snap" into place.
Using a phillips screwdriver, insert the guard screw as shown in (fig. E) to complete the guard assembly.
- Once the guard is installed, remove the covering from the line cut-off blade, located on the edge of the guard.
Warning! Never use the tool unless the guard is properly fitted.
Push the Auxiliary handle (3) onto the tube (10).
Slide the bolt (11) into the hex-shaped hole in the handle and through to the opposite side.
Tighten the knob (12) onto the bolt by turning it clockwise.
Warning! Ensure that the teeth on the button are correctly aligned in slots in the handle and that the handle is secure.
The auxiliary handle (3) can be adjusted to provide optimum balance and comfort.
Loosen the knob (12) on the bolt (11) by truning it counterclockwise.
Gently slide the second handle up and down the tube (10) to the desired hight for comfort.
- Tighten the knob (12) onto the bolt by turning it clockwise.
This tool has a telescopic mechanism, allowing you to set it to a comfortable height.
To adjust the height setting, proceed as follows:
Release the hight adjust locking clamp (5).
Gently pull the tube (10) up or down to the desired height.
Close the hight adjust locking clamp (5).
In transit, the cutting line is taped to the spool housing.
Warning! Before assembly, remove the battery from the tool.
Remove the tape holding the cutting line to the spool housing (9).
To fit the battery (2), line it up with the receptacle on the tool. Slide the battery into the receptacle and push until the battery snaps into place.
To remove the battery, push the release button (\$) while at the same time pulling the battery out of the receptacle.
Warning! Let the tool work at its own pace. Do not overload.
The battery needs to be charged before first use and whenever it fails to produce sufficient power on jobs that were easily done before. The battery may become warm while charging; this is normal and does not indicate a problem.
Warning! Do not charge the battery at ambient temperatures below 10^ or above 40^ . Recommended charging temperature: approx. 24^ .
Note: The charger will not charge a battery if the cell temperature is below approximately 10^ or above 40^ . The battery should be left in the charger and the charger will begin to charge automatically when the cell temperature warms up or cools down.
To charge the battery (2), insert it into the charger. The battery will only fit into the charger in one way. Do not force. Be sure that the battery is fully seated in the charger.
Plug in the charger and switch on at the mains. The charging indicator will flash green continuously (slowly).
The charge is complete when the charging indicator lights green continuously. The charger and the battery can be left connected indefinitely with the LED illuminated. The LED will change to flashing green (charging) state as the charger occasionally tops up the battery charge. The charging indicator will be lit as long as the battery is connected to the plugged-in charger.
The charger and battery pack can be left connected with the LED glowing indefinitely. The charger will keep the battery pack fresh and fully charged.
If the charger detects a weak or damaged battery, the charging indicator will flash red at a fast rate. Proceed as follows:
Re-insert the battery (2).
If the charging indicators continue flashing red at a fast rate, use a different battery to determine if the charging process works properly.
If the replaced battery charges correctly, the original battery is defective and should be returned to a service centre for recycling.
If the new battery gives the same indication as the original battery, take the charger to be tested at an authorised services centre.
Note: It may take as long as 30 minutes to determine that the battery is defective. If the battery is too hot or too cold, the LED will alternately blink red, fast and slow, one flash at each speed and repeat.
To switch the trimmer on, pull the lock off button (13) (shown in inset, figure I) back toward the battery (2) and then squeeze the trigger switch (1).
To switch the trimmer off, release the trigger switch.
With the unit on, angle unit and slowly swing the trimmer side to side as shown in figure 1.
Maintain a cutting angle of 5^ to 10^ as shown in figure 11. Do not exceed 10^ (fig 12). Cut with the tip of the line. To keep distance from hard surfaces use edge guide (7).
Maintain a minimum distance of 24 inches (609.6 mm) between the guard and your feet as shown in (fig. 11). To achieve this distance adjust the overall height of the trimmer as shown in (fig. H).
The wheeled edge guide should only be used when in the edging mode. The trimmer can be used in trimming mode or edging mode to trim overhanging grass along lawn edges and flower beds. For edging, the trimmer head should be in the position shown in (fig. K). If it is not:
Remove the battery from the trimmer.
Press and hold the head-release button (14) as shown in (fig. J).
While holding the auxiliary handle (3), rotate the head (6) counterclockwise.
Release the head-release button clockwise.
Note: The head will only rotate in one direction.
When being used as an Edger, stones, pieces of metal and other objects can be thrown out at high speed by the line. The trimmer and guard are designed to reduce the danger. However, MAKE SURE that other persons and pets are at least 100 feet (30m) away. Optimum cutting results are achieved on edges deeper than 2 inches (50 mm).
Do not use this trimmer to create trenches.
Using the edging wheel (7), guide the trimmer as shown in figure K.
Position the edging wheel on the edge of the sidewalk or abrasive surface so the cutting line is over the grass or dirt area to be edged.
To make a closer cut, slightly tilt the trimmer.
Before you begin trimming, only use the appropriate type of cutting line. Use BLACK+DECKER replacement spool Model No. AF-100, and replacement cap RC-100. Reload nylon line (either bulk or prewound replacement spool) as shown in this manual.
USE ONLY .065 inch (1.65 mm) DIAMETER ROUND NYLON MONOFILAMENT LINE. Do not use serrated or heavier gauge line, as they will overload the motor and cause overheating, and will not feed properly. This line is available at your local dealer or authorized service center.
Other replacement parts (guards, spool caps, etc.) are available through BLACK+DECKER service centers.
Warning! The use of any accessory not recommended by BLACK+DECKER for use with this trimmer could be hazardous.
Remove battery from trimmer.
Depress the tabs (15) and remove the spool cap (9) from the spool housing (16) in the trimmer head (fig. M).
For best results, replace spool with BLACK+DECKER model # AF-100.
- Grasp empty spool with one hand and spool housing with other hand and pull spool out.
If lever (17) in base of housing becomes dislodged, replace in the position as shown in (fig. N) before inserting new spool into housing.
Remove any dirt and grass from the spool and housing.
Unfasten the end of the cutting line and guide the line into the eyelet (19) (fig. O).
Take the new spool and push it onto the boss (18) (fig. N) in the housing. Rotate the spool slightly until it is seated. The line should protrude approximately 5-3/8 inches (136mm) from the housing.
Align the tabs on the spool cap with the slots (20) in the housing (fig. O).
CAUTION: To avoid trimmer damage, if the cutting line protrudes beyond the trimming blade, cut it off so that it just reaches the blade.
Bulk line is also available for purchase from your local retailer. To install bulk line, follow the steps below:
Remove battery from trimmer.
- Remove the empty spool from the trimmer as described in "Replacing the spool".
Remove any remaining cutting line from the spool.
Make a fold at the end of the cutting line at about 3/4 inch (19mm) (21). Feed the cutting line into one of the line anchoring slots (22) as shown in (fig. P).
Insert the 3/4 inch (19mm) end of the bulk line into the hole (23) in the spool adjacent to the slot as shown in (fig. Q). Make sure the line is pulled tight against the spool as shown in (fig. Q).
Wind the cutting line onto the spool in the direction of the arrow on the spool. Make sure to wind the line on neatly and in layers. Do not crisscross (fig. R).
- When the wound cutting line reaches the recesses (24), cut the line. (fig. Q).
Fit the spool onto the trimmer as described in "Replacing the spool".
NOTE: Hand wound spools from bulk line are likely to become tangled more frequently than BLACK+DECKER factory wound spools. For best results, factory wound spools are recommended.
Handwound replacement spools:
A6170 (25cm) #A6171 (40cm).
If your tool seems not to operate properly, follow the instructions below. If this does not solve the problem, please contact your local BLACK+DECKER repair agent.
Warning! Before proceeding, remove the battery from the tool.
Align the tabs on the spool cover with the cut outs in the housing.
Push the cover onto the housing until it snaps securely into place.
If the cutting line protrudes beyond the trimming blade, cut it off so that it just reaches the blade.
Carefully clean the spool cover and housing.
Remove the spool and check if the lever can move freely.
Remove the spool and unwind the cutting line, then wind it on neatly again as described above. Replace the spool as instructed.
Your BLACK+DECKER corded/cordless appliance/tool has been designed to operate over a long period of time with a minimum of maintenance. Continuous satisfactory operation depends upon proper tool/appliance care and regular cleaning.
Your charger does not require any maintenance apart from regular cleaning.
Warning! Before performing any maintenance on corded/ cordless power tools:
Switch off and unplug the appliance/tool.
Or switch off and remove the battery from the appliance/ tool if the appliance/tool has a separate battery pack.
Or run the battery down completely if it is integral and then switch off.
Unplug the charger before cleaning it. Your charger does not require any maintenance apart from regular cleaning.
Regularly clean the ventilation slots in your tool/appliance and charger using a soft brush or dry cloth.
Regularly clean the motor housing using a damp cloth. Do not use any abrasive or solvent-based cleaner.
Regularly clean the cutting line and spool using a soft brush or dry cloth.
Regularly use a blunt scraper to remove grass and dirt from the underneath of the guard.

Separate collection. This product must not be disposed of with normal household waste.
Should you find one day that your BLACK+DECKER product needs replacement, or if it is of no further use to you, do not dispose of it with household waste. Make this product available for separate collection.

Separate collection of used products and packaging allows materials to be recycled and used again. Re-use of recycled materials helps prevent environmental pollution and reduces the demand for raw materials.
Local regulations may provide for separate collection of electrical products from the household, at municipal waste sites or by the retailer when you purchase a new product.
BLACK+DECKER provides a facility for the collection and recycling of BLACK+DECKER products once they have reached the end of their working life. To take advantage of this service please return your product to any authorised repair agent who will collect them on our behalf.
You can check the location of your nearest authorised repair agent by contacting your local BLACK+DECKER office at the address indicated in this manual. Alternatively, a list of authorised BLACK+DECKER repair agents and full details of our after-sales service and contacts are available on the Internet at: www.2helpU.com

At the end of their useful life, discard batteries with due care for our environment:
Run the battery down completely, then remove it from the tool.
NiCd, NiMH and Li-Ion batteries are recyclable. Place the battery(s) in a suitable packaging to ensure that the terminals cannot be short-circuited. Take them to any authorised repair agent or a local recycling station.
Do not short-circuit the battery terminals.
- Do not dispose of the battery(s) in a fire as this may result in a risk of personal injury or an Explosion.
Technical data
| STC1840 H 1 | ||
| Input Voltage | Vsc | 18 |
| No-Load Speed | min· | 5500-7200 RPM |
| Weight | kg | 2.85 |
| Battery BL4018 | ||
| Voltage | V* | 18 |
| Capacity | Ah | 4.0 |
| Type | Li-Ion |
| Charger 90571352 | (typ. 1) | |
| Input Voltage | Vac | 100 - 240 |
| Output Voltage | Vcc | 8 - 20 |
| Current | mA | Input: 500 Output: 2000 |
Hand/arm weighted vibration value according to EN 786:
= 9.0m / s uncertainty (K) = 1.5m / s
L_ (sound pressure) 93 dB(A)
uncertainty (K) = 1.6 dB(A)

STC1840
Black & Decker declares that these products described under
"technical data" are in compliance with:
2006/42/EC, EN 60335-1, EN 60335-2-91
2000/14/EC, Lawn Trimmer, L ≤ 50 cm, Annex VIII
DEKRA Certification B.V., Utrechtseweg 310,
6802 ED Arnhem, The Netherlands
Notified Body ID No.: 0344
Level of acoustic power according to 2000/14/EC
(Article 12,Annex III, L≤ 50cm
L_a (measured sound power) 90 dB(A)
uncertainty (K) = 1.6 dB(A)
L_ (guaranteed sound power) 92 dB(A)
These products also comply with Directive 2014/30/EU and 2011/65/EU.
For more information, please contact Black & Decker at the following address or refer to the back of the manual.
The undersigned is responsible for compilation of the technical file and makes this declaration on behalf of Black & Decker.

R.Laverick
Engineering Manager
Black & Decker Europe, 210 Bath Road, Slough,
Berkshire, SL1 3YD
United Kingdom
12/11/2014
Black & Decker is confident of the quality of its products and offers an outstanding guarantee. This guarantee statement is in addition to and in no way prejudices your statutory rights. The guarantee is valid within the territories of the Member States of the European Union and the European Free Trade Area.
If a Black & Decker product becomes defective due to faulty materials, workmanship or lack of conformity, within 24 months from the date of purchase, Black & Decker guarantees to replace defective parts, repair products subjected to fair wear and tear or replace such products to ensure minimum inconvenience to the customer unless:
The product has been used for trade, professional or hire purposes;
The product has been subjected to misuse or neglect:
The product has sustained damage through foreign objects, substances or accidents:
Repairs have been attempted by persons other than authorised repair agents or Black & Decker service staff.
To claim on the guarantee, you will need to submit proof of purchase to the seller or an authorised repair agent. You can check the location of your nearest authorised repair agent by contacting your local Black & Decker office at the address indicated in this manual. Alternatively, a list of authorised Black & Decker repair agents and full details of our after-sales service and contacts are available on the Internet at: www.2helpU.com
Please visit our website www.blackanddecker.co.uk to register your new BLACK+DECKER product and to be kept up to date on new products and special offers. Further information on the BLACK+DECKER brand and our range of products is available at www.blackanddecker.co.uk
Black & Decker Europe, 210 Bath Road, Slough,
Berkshire, SL1 3YD
Großbritannien
12/11/2014
This appliance includes some or all of the following features.
Responsible technique
Black & Decker Europe, 210 Bath Road, Slough,
Berkshire, SL1 3YD
Royaume-Uni
12/11/2014
Black & Decker Europe, 210 Bath Road, Slough,
Berkshire, SL1 3YD
Regro Unito
12/11/2014
Black & Decker Europe, 210 Bath Road, Slough, Berkshire, SL1 3YD
Verenigd Koninkrijk
12/11/2014
Black & Decker Europe, 210 Bath Road, Slough,
Berkshire, SL1 3YD
Reino Unido
12/11/2014
Director de Engenharia
Black & Decker Europe, 210 Bath Road, Slough, Berkshire, SL1 3YD Reino Unido 12/11/2014
Black & Decker Europe, 210 Bath Road, Slough,
Berkshire, SL1 3YD
Storbritannien
11/09/2014
Black & Decker Europe, 210 Bath Road, Slough,
Berkshire, SL1 3YD
Storbritannia
12/11/2014
Black & Decker Europe, 210 Bath Road, Slough,
Berkshire, SL1 3YD
Storbritannien
12/11/2014
Black & Decker Europe, 210 Bath Road, Slough,
Berkshire, SL1 3YD
Black & Decker Europe, 210 Bath Road, Slough,
Berkshire, SL1 3YD
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12/11/2014
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service.austria@sbdinc.com
Portugal Black & Decker Limited SARL Tel. 214667500
www.blackanddecker.pt Quinta da Fonte - Edificio Q55 D. Diniz Fax 214667580
resposta.resvenda@sbdinc.com Rua dos Malhoes, 2 e 2A - Piso 2 Esquerdo
2770 - 071 Paço de Arcos
emeaservice@sbdinc.com
Middle East & Africa Black & Decker Tel. +971 4 8863030
www.blackanddecker.ae P.O.Box-17164 Fax +971 48863333
service.mea@sbdinc.com Jebel Ali Free Zone (South),Dubai,
UAE