Bosch R1255VC Rotary Hammer Specifications:
Model name: Bosch R1255VC Rotary Hammer (RH)
Manufacturer: Bosch Inc., Germany.
Ships with two bits; one bit for drilling holes and another bit for turning screws.
2-inch diameter, 1/4 inch thick steel body, hardened to 60 HRC (hardness of iron).
Steel head weighs 0.6 ounce.
Rotating chuck weighs 4 ounces.
Ammunition capacity: 3/8 inch drill bit, 1/4 inch screw driver bit, 5/32nd hex wrench bit, 7/16th nutdriver bit, 1/2 inch socket cap setter bit and other small bits.
Head weight: 0.5 ounce.
Maximum operating speed: 25 revolutions per minute (rpm).
The Bosch R1255VC Rotary Hammer is a powerful tool designed for use on metal, wood and plastic surfaces. The R1255VC has been used extensively in the automotive industry and in some construction applications where strength, durability and reliability are required.
The R1255VC may be the most powerful hand-held rotary hammer in its class. It is a durable, high-quality tool designed for heavy-duty work.
The R1255VC is also known as a SDS Rotary hammer and it uses a “Systeme DIN-Sonder-Drehmoment” cartridge with a 2-inch bit. The SDS rotary hammer cartridge has a two-part design.
A front piece is screwed on to the cartridge and then a back piece is added to hold the bit shank. The front and back portions of the SDS cartridge are sized to match the diameter of the bit shank being used.
Bosch R1255VC Rotary drill bits
The front portion of the cartridge is sized 0.5, 0.6, 0.8, 1 or 1.3 inches and the back portion is sized 1.2, 1.5, 2, 2.5 or 3 inches.
In theory there are 24 possible solutions when matching front and back portions of the SDS cartridge but only 19 of these combinations are commonly used. These 19 combinations are identified with letters of the alphabet.
For example: The most common bit shank diameter is 0.5 inches.
The most common front portion is 0.6 inches. This combination is identified as C.
The R1255VC uses SDS-max bits. SDS-max bits have a hexagonal shank which plug into the rotary hammer and self-center themselves for more efficient drilling and screwdriving.
The R1255VC has an excellent feature that allows it to quickly and easily adapt itself to changing bits. Simply turn the rotary hammer’s “system handle” and the front portion of the SDS-max cartridge will quickly release and then re-attach to the next size back portion.
Turn the “system handle” in the opposite direction and the front portion is released for removal. The R1255VC has a rotational speed of up to 2,500rpm (rotations per minute).
This makes the R1255VC one of the most powerful in its class.
What are SDS-max bits?
SDS stands for “Self-Drilling Screw.” The standard drill bit has a tapered edge which engages the material as it rotates. As the bit bores into hard or tough material, it tends to bend or break. The SDS-max bit uses a hardened steel core that drills into the toughest materials with less wear and tear.
How is the R1255VC used?
The R1255VC is very easy to use. Simply insert a bit into the SDS-max cartridge, place the nose against the material and push or pull it in the desired direction of drilling. The R1255VC is cordless, making it useful for on-the-spot jobs requiring quick energy and movement. It is also extremely light-weight at only 4.3 pounds with batteries installed. This also allows the user to drill in tight spots and overhead locations.
The R1255VC is a very versatile tool. It may be used for drilling holes in wood, metal or plastic.
It may also be used for driving screws into wood or metal. The rotary hammer may be used for drilling holes in drywall as long as the “Rotary Hammer Drill Bit” cartridge is installed. The R1255VC’s only limitation is that it can not be used underwater.
Battery voltage and life
The R1255VC is powered by two 12-volt Nickel-Cadmium (NiCad) batteries. For most applications, these batteries will provide the user with a full day of drilling on a single charge.
If used excessively or for continuous periods of time, the batteries will only last for about one hour. This is still sufficient time for most projects.
How to make the R1255VC last longer
If the R1255VC is used excessively, the life of its batteries will be significantly decreased. This will result in more frequent battery replacement and ultimately higher overall cost of operation.
Fortunately, there are several steps that may be taken to maximize the life of the battery.
The first step is to allow the R1255VC’s batteries to fully charge before use. Each battery has an indicator light that changes from red to green when the battery is fully charged.
This usually takes between one and a half to two hours.
The next step is to turn the R1255VC off after each use. While this seems like common sense, it might be tempting to leave the R1255VC running while you go do something else.
However, the batteries will continue to drain even when the drill is not in use. Over a short period of time, this can significantly decrease the life of the batteries.
How to prolong your R1255VC’s life
It is possible to extend the life of your R1255VC by doing routine maintenance. The first and most important step is to keep its internal parts clean.
This is especially true for the drill bit and SDS-max cartridge.
The drill bit tends to become packed with dried material. The drying agents used in construction and woodworking materials are especially hard on the drill bit.
These dried materials should be cleaned out of the drill bit about once every day of use. This will lengthen the life of the drill bit and motor.
The SDS-max cartridge is also susceptible to drying out. The best way to prevent this is to store it in a cool, dry place.
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