FLEX FT312 Shroud Dust Grinding Surface User Manual

OPERATOR’S MANUAL
MANUAL DEL OPERADOR
MANUEL DE L’UTILISATEUR
Model: FT312
4″-5″ SURFACE GRINDING DUST SHROUD

WARNING
For your own safety, read the instruction manual for this dust shroud, the angle grinder, the cup wheel, and the dust extractor (vacuum cleaner) before use. Failure to heed these warnings may result in personal injury and property damage.

SPECIAL SAFETY INSTRUCTIONS FOR SURFACE GRINDING DUST SHROUD
The shroud must be securely attached to the angle grinder and positioned for maximum safety, so the least amount of the wheel is exposed towards the operator.The shroud is designed to collect dust in conjunction with a dust extractor and help protect the operator from accidental contact with the wheel. Only use dry diamond surface cup wheels with this surface grinding shroud. The surface grinding shroud is not intended to be used with standard grinding, cut-off, cup wheels or wire brushes.
Do not use accessories that require liquid coolants. Using water or other liquid coolants may result in electrocution or shock.
DO NOT use wire brushes with this surface grinding shroud.
DO NOT use abrasive wheels.
DO NOT grind or cut metal with a diamond cup wheel. Fragments could loosen and fly apart causing injuries and damage.
ALWAYS use with a dust extractor.
Wear eye, dust, and ear protection. Always use a side handle. When not in use, place the grinder on a stable surface where it will not move inadvertently, roll or cause a tripping or falling hazard. Serious personal injury may result.

INTENDED USE

– The dust shroud has been designed for the extraction of dust created during grinding, leveling, and polishing of concrete surfaces in conjunction with a suitable dust extractor/vacuum cleaner (sold separately).
– The dust shroud is designed to work only with FLEX angle grinders FX3181, FX3181A, FX3171A, and FX3171.
– The dust shroud is designed to work only with diamond cup wheels with a maximum diameter of 5″ (125mm).

FUNCTIONAL DESCRIPTION

ASSEMBLY

WARNING
Damaged or defective dust shrouds and damaged/defective accessories that are part of the dust shroud must be replaced in all cases. Not following this instruction presents a high risk of injury!
WARNING
Use this dust shroud only with FLEX angle grinders FX3181, FX3181A, FX3171A, and FX3171. Using any other tool may cause injury and property damage.
WARNING
Turn the tool OFF and remove the battery pack before performing any assembly.
ATTACHING DUST SHROUD TO ANGLE GRINDER

a. Follow the chapter “WHEEL GUARD INSTALLATION” in the angle grinder manual to remove the grinding (or cut-off) guard from the angle grinder.
b. Remove the adapter ring from the dust shroud, align the three raised ribs on the adapter ring with the three notches on the collar of the grinder. Put the adapter ring onto the collar (Fig. 2a).
c. Rotate the adapter ring clockwise to the desired position (Fig. 2a). Rotation is possible in one direction only!
d. Loosen the clamp bolt on the dust shroud counterclockwise with the supplied hex wrench. Insert the adapterring, attached to the grinder, into the collar of the dust shroud according to the desired position (Fig. 2b).
e. Tighten the clamp bolt clockwise with the wrench (Fig. 2b).

INSTALLING / REMOVING DIAMOND CUP WHEEL (FIG. 3)

WARNING
Use only diamond cup wheels with a maximum diameter of 5″ (125mm). With the battery pack removed and the dust shroud properly attached to the grinder, follow these steps to install a cup wheel:
a. Place the backing flange on the spindle, making sure that the flat surfaces on the bottom of the backing flange are engaged with the flat surfaces on the spindle.
b. Place the diamond cup wheel (sold separately) onto the spindle over the backing flange as shown.

c. Thread the lock nut onto the spindle as shown.
WARNING
Do not reverse the lock nut. If the lock nut is not installed properly, the wheel cannot be properly tightened resulting in possible serious injury.
d. While pressing the spindle lock, tighten the lock nut by turning it clockwise with the wrench included with the grinder.
To remove the cup wheel:
a. With the battery pack removed, press the spindle lock.
b. Loosen the lock nut by turning it counterclockwise with the wrench included with the grinder.
WARNING
Press the spindle lock only when the spindle is at a standstill.
WARNING
Use protective gloves when removing the wheel from the tool, or first allow the wheel to cool down. Wheels may be hot after prolonged use.

CONNECTING TO DUST EXTRACTOR (FIG. 4)

OTE: Read the OSHA regulation on silica dust and the related OSHA Silica Table 1 to understand the requirements needed to reduce exposure to silica dust at the worksite. Specific rules apply to the drilling, demolition, cutting and grinding materials that contain silica. According to OSHA Silica Table 1, when dry cutting or dry surface grinding concrete type materials using hand held grinders, the dust extractor (dust collector) being used must provide 25 CFM (cubic feet per minute) or greater air flow per inch of wheel diameter. For example, 5″ grinding wheel requires a dust extractor with a rating of at least 125 CFM.

All OSHA requirements can be found at OSHA website: www.osha.gov
Always check the OSHA website for the latest regulations.
WARNING
This dust shroud MUST BE used with a dust extractor suitable for concrete/masonry dust collection. ALWAYS wear a certified safety face or dust mask.
The dust extractor port of the shroud is designed to connect to Ø1-1/4″ dust extractor hoses or adapters.
Connect a suitable dust extractor hose to the dust extractor port. Use an adapter (supplied) if needed. Make sure the connection is tight and secure.

OPERATING INSTRUCTIONS

The angle grinder should ALWAYS be used with a dust extractor vacuum designed for dust removal.
WORKING AGAINST A WALL

WARNING
To pull off the segment, turn off the power tool and remove the battery pack. Only remove the segment when working against a wall. For all other work, the segment must be mounted. The open area of the dust shroud must point in the direction of the wall and away from the user.
Removing the segment (Fig. 5a)
Pull out the segment from the side guides on the dust shroud according to the arrow direction on the segment.
Storing the segment (Fig. 5b)
Push the segment into the side guides of the segment holder according to the arrow direction on the segment holder, until it engages audibly.

Replacing brush ring (Fig. 6)
If the brush ring is damaged or exhibits excessive signs of wear, it should be replaced.
a. Remove the cup wheel (see the section “Installing / Removing Diamond  Cup Wheel” in this manual)
b. Pull out the brush rings from the guide
of the dust shroud and the segment.
c. Insert a new brush ring into the guide of the dust shroud and into the segment.

© Chervon North America
1203 E. Warrenville Rd., Naperville, IL 60563
www.flexpowertools.com
www.registermyflex.com
1-833-FLEX-496 (1-833-353-9496)
03/21

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