When drilling long Material What precautions should be taken

Do not wear loose clothing or jewelry while operating a drill press. Confine long hair with a cap or hair net. 2. Wear industrial quality eye protection while drilling.

What safety precautions are needed when using a drill press?

Make sure the drill press has a working emergency stop button (e-stop). Make sure a guard, shield or barrier is in place and functioning properly before starting work. Use a vacuum, brush or rake to remove cuttings. Remove burrs and chips from a drilled hole.

What is the rule when choosing the correct speed to drill different materials?

The harder the work material, the slower the cutting speed. The softer the work material, the faster the recommended cutting speed (See Figure 1). The hardness of the cutting tool material will also have a great deal to do with the recommended cutting speed. The harder the drill, the faster the cutting speed.

When can you drill long stock?

Long stock should be drilled with the excess to the left of the operator. If the stock rotates it will hit the post, not the operator. 11. Support the underside of the stock to be drilled with a backer board secured to the drill press table.

What should you not do with a drill?

1. Do not wear any loose clothing or ties. …
2. Do not wear gloves, rings, watches, or bracelets while working with a drill press.
3. Do not set speeds, adjust, or measure work until the machine is completely stopped.
4. Do not force the drill with extra pressure.

What kind of pressure should be applied to a drill during the drilling operation?

Apply moderate even pressure to the drill during the drilling operation. If excessive pressure is required to make the bit cut then the bit is dull and needs to be sharpened. 5.

What is the safety procedure in drilling operation?

The power drill must be held firmly with both hands to control operational accuracy and the rotational torque. Keep hands and fingers well clear of moving parts. Avoid blocking and covering the motor ventilation slots with your hands. Allow the drill to reach operating speed, then apply load gradually.

What is clearance hole for screws?

A clearance hole is a hole drilled in the top material to prevent jacking. The hole should be large enough for the body of the screw to fit through, without the threads engaging with the material.

What are 20 safety rules you should follow when using the drill press?

1. Run drill at correct RPM for diameter of drill bit and material. …
2. Always hold work in a vise or clamp to the drill table.
3. Use a correctly ground drill bit for the material being drilled. …
4. Use the proper cutting fluid for the material being drilled. …
5. Remove chips with a brush, never by hand.

What should be used to mark the start point before drilling a hole in steel?

A center punch is a tool with a pointed end that makes a dimple in your piece of material right where you intend to drill a hole.

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What is the general rule for drill speeds and sizes of drills?

Speed equals 80 surface feet per minute in 100 Brinell hardness material and the speed should be reduced 10 surface feet per minute for each additional 50 points Brinell hardness. Feed and speed rates should be reduced up to 45-50‰ when drilling holes deeper than 4 drill diameters.

When should you change drill speed?

Generally, the higher speed and lower torque range is used for smaller diameter drilling tasks, and the lower speed and higher torque range for larger bits and tougher tasks. The lower speed range is also usually better for driving and fastening tasks.

Why is speed important in drilling operation?

Cutting speed is one of the most important factors that determine the life of a drill. If the cutting speed is too slow, the drill might chip or break. A cutting speed that is too fast rapidly dulls the cutting lips.

What are the personal protective equipment when you are operate a drilling machine?

In terms of personal protective equipment (PPE), the only piece of equipment that’s absolutely necessary when operating a drill press is a pair of high-grade, shatter-proof goggles with side shields. Eye injuries are known to occur when metal shards or debris are shot from underneath the drill.

Should you wear gloves when drilling?

Do not wear gloves, rings, watches, or bracelets while working with a drill press. Do not set speeds, adjust, or measure work until machine is completely stopped. Do not force the drill with extra pressure.

Why do you need to follow the safety precautions and procedure while using the portable electric drill?

Today, the portable power drill’s widespread use also carries with it the risk of electric shock, puncture wounds, cuts, contusions from spinning/moving parts, strains from torque power, hair and clothing entanglement, contaminant inhalation, burns from hot drill bits, and eye injuries.

What drill speed is needed for wood drilling operations?

Diameter (in)Speed (rpm)Softwood (Pine)Hardwood (Hard Marple)1/16 – 3/16300030001/4 – 3/8300015007/16 – 5/81500750

What is the purpose of a pilot hole when drilling?

Drilling a pilot hole before using a screw or nail to join parts together makes the process easier and prevents the wood from splitting.

What three operations on the drill press can be performed?

The chief operation performed on the drill press is drilling, but other possible operations include: reaming, countersinking, counterboring, and tapping.

When drilling how should feed be adjusted when breaking through a workpiece?

Always feed the bit slowly into the workpiece. If the hole to be drilled is deep, draw the bit back often to remove shavings. 14.

How do you calculate clearance hole size?

The LMC clearance hole also can be calculated by adding the diameter of the fastener and the diameter of the fastener head and then dividing the sum by two. This method of selecting the LMC clearance hole size is a rule of thumb that will yield the largest hole that will fit under the head of the fastener.

Are clearance holes necessary?

When assembling cabinet parts using screws, drilling a clearance hole with a countersink is a necessity. A pilot hole for the screw may or may not be necessary at all. A clearance hole will allow a screw to pass through it without the threads biting into the material. …

Do you need a clearance hole?

Usually you need a clearance hole so that the screw literally clears the first piece of wood and doesn’t hold on to it. This is to prevent a problem called bridging where the screw acts like a bridge between the two pieces of wood, holding them apart.

How do you pre drill metal?

Drill at a Slow Speed In general, it’s a good idea to drill through metal using as slow a speed as possible using a drill bit for metal. Hard metals like steel and larger drill bits require even slower speeds. With a small twist bit (1/16 in. to 3/16 in.), you can drill through most metals at 3,000 rpm.

How is SFM calculated?

1. Surface Feet Per Minute. SFM = .262 x D x RPM. …
2. Inches Per Minute. CPT x Z x RPM = IPM. …
3. Revolutions Per Minute. 3.82 x SFM / D = RPM. …
4. Chipload Per Tooth. IPM / (Z x RPM) = CPT. …
5. Feed Per Revolution. IPM / RPM = FPR. …
6. Metal Removal Rate. WOC * DOC * IPM = MRR. …
7. Radial Chip Thinning.

What is feed rate in drilling?

Rate at which a drilling bit is advanced into or penetrates the rock formation being drilled, expressed in inches per minute, inch per bit revolution, number of bit revolutions per inch of advance, or feet per hour. Also called cutting rate; forward speed.

What are drill torque settings?

Most drills on the market today have adjustable torque settings and high and low speed settings. These settings help when driving screws into wood. … The higher the torque setting, the more power to drive the screw. Setting the torque setting on a drill sometimes requires adjusting the high and low speed setting as well.

What is torque for a drill?

Torque is the force the drill produces to turn an object, not how fast an object will turn. In recent years torque ratings have been steadily increasing to levels beyond what is actually needed to complete applications.

What is a good torque for a drill?

Newton Metres (Nm) on drills: 4 to 15Nm is fine for all of those smaller screw driver tasks around the home. 15 to 35Nm is a great all-rounder to drill and drive medium sizes screws and hole drilling. 35Nm upward will tackle all of those more serious project with bigger screws and holes.

What are drilling parameters?

Publisher Summary. Drilling rate is a function of weight on the bit, rotary speed, bit type, and size, hydraulics, bottom-hole cleaning properties of drilling fluid, and formation characteristics. … Complications may also arise during bit drilling, which may mask any penetration rate change due to overpressure.

Why reaming is done?

The primary purpose of reaming is simply to create smooth walls in an existing hole. Manufacturing companies perform reaming using a milling machine or drill press.