Screw Driver Image

Types of screw Drive


Screw Driver Image
Screw Driver Image
  1. Slotted Type Screw driver
  2.  Flat Head screw driver

A flat head screw driver is used to tighten or loose slot screws. It is the first type of screw driver used from centuries and is probably the cheapest and the easiest type of screw driver.
It is mostly used in the simple applications like woodworking etc. It is also called as flat blade screw driver.

ii) Cross or Doubled Slot Screw Drive:

A cross slot screw drive has two slots, orientated perpendicular to each other. A slotted type screw drive is used to drive one of the slots.

It is mostly found in the cheaply made roofing bolts. The only advantage of using these screws is that if one of the slots get damaged then other could be used.

Cruciform Types screw driver
cruciform means a cross shape. It is also known by other names such as cross recessed, cross head, cross tip and cross point.
Now you must be wondering how cruciform type screw drive is different form cross screw drive
well, in cross screw drive the slots are not recessed but in cruciform they are recessed. You can easily understand it through images given below:

i) Philips Screw Driver

You must have heard the name of the company Philips screw drive. The Philips screw drive was created by John P.Thompson who later sold it to Henry F. Philips.

Philips screw drive has a cross head shape that it is in the shape of letter ‘X’. The philips screw driver has slightly rounded corners in the tool recess.

The Main purpose of the design the screw driver is that the driver will slip     out or cam out under strain to prevent overtightening of the screw.

With the advancement of the time now we have power tools to handle multiple tightening of screws when they are used on a large scale. Interchangeable Philips bits are used for getting faster efficient results.

Philips drive bits are often designated by the letters “PH” plus a size code 0000, 000, 00, 0, 1,2,3 or 4 (in the order of increasing size); here the numerical bit size codes does not  always correspond to nominal screw size numbers.
The advantage of Philips Screw driver over flat head screw driver is that the flat head screw drive tends to slip out while the Philips screw driver are self-centering , it doesn’t get slip out of the X-slotted screw, gripping the screw firmly in the center and thus giving an extended tool life.

III) FREARSON  or Reed and prince screw drive

English inventor John Fearson developed Fearson screw driver in the 19th century.

Fearson screw drive are similar to the Philips but Freason screw drivers have a sharp tip and have larger V shape angle.

The main advantage of Fearson over philips is that one driver or bit fits all the screw drive. The tool recess is a perfect, sharp cross, allowing for higher applied torque, unlike the rounded, tapered philips head which cam out at high torque.

It is mostly found in the marine hardware.

iv) JIS (JAPAN Industry standard) screw Driver

JIS stands for Japanese Industry Standard screws are commonly found in Japanese Equipment’s.

Specific “JIS” standardized cruciform-blade screw drivers are used for this type of screw.

The JIS screws are usually identified by an upraised or recessed dot on the head, or the fact that they are completely gored out and will only come off with a set of Vise-Grips.

JIS may look similar to Philips head it all comes down to the way they lock into this group a Philips is meant to cam out once you get to the proper torque

If you look at the JIS bit it has a much tighter radius at the cross section and its nearly perpendicular. A JIS bit is shallower whereas a Philips comes more to a point.

SO, you must be thinking what will happen when you put a Phillips screw driver in a JIS group well it bottoms out and it doesn’t grip securely and it rounds off the corners harming the screw.

Another question which might come in your mind is how to know whether a screw is a JIS or Philips Its actually really simple just look at the screw head if it’s got a dot then it is JIS no dot Philips.

Nice part about the JIS screw driver it actually fits in Philips head.

Every mechanic uses JIS screw driver. All kinds of shape and sizes are available in JIS. It is most common tool used by the mechanics.

v) Mortorq Scew Driver

Mortorq screw was developed by the Philips Screw Company and is mostly used in automotive and aerospace applications operated by a Mortorq screw driver.
The screw is designed to be a light weight, low-profile and high strength drive, with full contact over the entire recess wing, reducing risk of stripping.

vi) Pozidriv Screw Diver

The Pozidriv is the improved version of the Phillips screw drive and was jointly patented by the Philips Screw Company and American Screw Company.

Advantage of Pozidriv screw driver over Philips screw driver is its decreased likelihood to cam out, which allows greater torque to be applied.

Pozidriv drive bits are often designated by the letters “PZ” plus a size code of 0,1,2,3,4 or 5(by the order of increasing size), remember the bit size codes do not necessarily correspond to nominal screw size numbers.

Attempting to use a Philips screwdriver bit is likely to cause damage because the design difference between them is fairly significant even though they appear to be very similar. A Philips screw driver has an angle on the flanks, a pointed tip and rounded corners.

The Pozdriv screw drivers have straight sided flanks, a blunt tip and additional smaller ribs at 45 degree to the main slots. The Pozdriv was designed specifically to allow much greater torque to be applied because of its more positive engagement.

The chief disadvantage of Pozidriv screw driver is that it looks visually quite similar to the Phillips, thus many people use the wrong screw driver. If We use Philips screw driver for a Pozidriv screws then philips screw drive may cam out and harm the screw head.

3) Robertson (square) Screw Driver

A Robertson also known as a square or scrulox screw has a square shaped socket in the screw head. Both the tool (Robertson screw driver) and the socket have a slight taper.

Square Screws are manufactured using cold forming of the heads, the taper provides two other advantages which have served to popularize the drive, it makes inserting the square screw driver easier and tends to keep the screw on the tool tip without the user needing to hold it there thus neglecting the cam-out effect and improving centering.

They ae widely used in Canada. Common places of application are in wood working and in general construction work.

4) Hexa Socket or Hex Screw Drive

In 1936, the German Company Bauer and schaurte patented the hex socket.

The hexa socket has a hexagonal recess and may be driven by a hex wrench, Allen key or a hex screwdriver. Hex nuts, bolts, and screws can be made out of many metals such as aluminum, brass, copper, and any grade of steel.

These are used to fasten bolts, nuts and screws. No cam out effect takes place while using this so most of the power tools can be fitted with hex arrangement bits making the production fast and with less error.

V) Torx screw driver or Hexalobular socket screw driver
It was developed in 1967 by Camcar Textron.

Torx screw has star shaped recess in the fastener with six rounded points and thus are also called as “Star tips” by technicians.

Tox is very popular in the automotive and electronics industries because of its resistance to came out, and extended bit life, as well as reduced operator fatigue by minimizing the need to bear down on the drive tool to prevent cam out.

Technicians use a number system to determine the size of the tip. Common sizes are t8, t10, t15, t25, t27, t30 and t40, the size of the tip increases as the number goes up.

For example, as t25 Screwdriver is a common sized used for automotive trim and lightning systems.

A variation of Torx Screwdriver is the tamper-proof torque style driver that can be recognized by a hole in the end at the screwdriver tip that matches a pin in the torque screw head.

Tamper- proof torque screws are often used on mass airflow sensors

vi) Clutch Screw Drivers

There are two types of clutch screw drives: Type A and Type G.

Type A: Type A also known as a “standard clutch”, resembles a bow tie, with a small circular “knot” at the center. These are common in the Gm automobiles, trucks , buses of the 1940s and 1950s.

Type G: Type g resembles a butterfly, and lacks the center “knot”. This type of screw head is commonly used in the manufacture of mobile homes and recreational vehicles. The clutch head is not necessarily tamper- resistant because it can be driven with a flat-blade screwdriver.

B) Temper Resistant Type Screw Driver

Let us discuss about the temper resistant type screw driver which are most commonly used on equipment’s such as home electronics.

i) Pentalobe screw Driver

Pentalobe screw driver has five-point temper resistant system. It is widely used in the Apple products.

Apple company first used it in the mid of 2009 to secure the battery in the Macbook Pro. Now, iPhone 4 and subsequent models uses it. Pentalobe screw drive includes:

a) TS1(also known as P2 or 0.8mm used in iPhone 4)
b) TS4(also known as P5 or 1.2mm used in MacBook)
c) TS5(also known as P or 1.5mm used in 2009 MacBook pro battery).
ii) Tri- point screw Driver

Tri-point screw drive is also called Y-type security screw head. It is similar to Philips screw head, but it has three points rather than four.

It is mostly used in the electronic equipment’s. Famous companies like Apple uses it in their products. For example, in 2010 and 2011 MacBook Pro Y-type screws were used to secure the battery. Apple watch and iPhone 7 have very small Y-type screws used in them.

iii) Tri-Wing

Tri wing is also known as triangular slotted. the shape is similar to a pinwheel, or you can say a screw with three slotted wings, and a small triangular hole in the center.

The slots are offset and do not intersect the center of the fastener. It also comes with left hand threads called the Opsit screw, where unscrewing can be done by turning the screw driver clockwise, which is the opposite of tri-wing and regular screws.

In the past it was used in the aerospace industry but at present it is usually seen in electronic equipment’s.
Battery operated screw driver:

A) Cordless Screw Driver

The cordless screw driver or battery operated screw driver uses a rechargeable battery, mostly Lithium-ion and some models use NiCad.

They are more comfortable in holding because of high quality rubberized material and are available in different sizes and weight depending upon the task to be performed.

There are mainly two types of cordless screw driver:

i) Straight: It is suitable for most basic jobs.

ii) Pistol shape: It is used when the application area is hard to reach and for awkward angles.

Advantages of using a cordless screw driver:

i) Portable: The main big advantage of cordless screw driver is that they are portable, can be carried to the workplace easily.

ii) Flexible: The battery operated screw drivers are rechargeable and is not tied to be used at a specific location only.

iii) safe: They are safe as no power cable are running around the floor.

iv) Efficient and Fast: Cordless screw driver are efficient and fast than the manual screw driver, saving time and money.

iv) Compact: The cordless screwdriver is very compact and can easily be carried in a small bag or purse to the workplace.

b) Magnetic Screw driver

A magnetic screw driver has a magnetic screw driver blade or Phillips head and shaft attached to a wooden or plastic handle.

These type of screw drivers are mostly used in the electronic industries specially in the areas which are hard to access.
It allows the operator to place a screw onto the tip of the screwdriver and have it remain attached to the screw driver while being inserted and installed into the fastening position.
This is really helpful in the place where installation of the screw is difficult because of the small space and same goes true with the reinstallation.

iii) Ratcheting

A ratchet screwdriver has a mechanism that allows the screw driver to apply turning force only in one direction, while it moves freely in the opposite direction. This means it can be set to dive or remove screws without having to move the bit in and out of the screw head at the end of each turn.

This help to save time by driving or removing screws and other threaded fasteners quicker and more comfortably
iv) Right angle screw driver

The Right angle screw drivers are designed to be turned at right angles. The biggest advantage of these type of screws is that they allow you to work at locations where you cannot reach easily with a straight hand screw driver, which make them extremely useful in automobile industries and other similar industries.

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