Category: Set Screws

Full Dog Point and Other Types of Set Screws

A set screw is a kind of fastener used to fasten two objects together. It is most commonly used in securing a gear or pulley to a shaft. It is usually headless and so it’s also known as ‘blind‘.

This kind of rivet is fully threaded and unlike other screws, it doesn’t have any head projecting out of the screw thread.  The blind set screw is known as a ‘grub screw‘ and is always driven with an internal-wrenching drive, such as Allen (hex socket), Torx (star), Roberston (square socket) or slot.

One of the most commonly used type of set screw is the full dog point set screw, which features a flat tip stretching from one end of the screw. This extended tip helps in locating a machined groove on a shaft.

In industrial applications, the set screw is enabled to pass through a threaded hole in the external object and is tightly secured against the inner device, so as to prevent the inner device from moving relative to the external object. This kind of method eventually releases a clamping force on the end tip of the hole.

This kind of action can be further explained with this example – When a set screw is secured into a pulley hub and its end-point is firmly attached to the shaft, some amount of friction is created between the screw and shaft. And because of this fastening action, some amount of plastic/elastic deformation is also created simultaneously.

Types of Set Screws

#Full Dog Point Set Screws – These types of set screws enable the shaft to rotate freely whilst maintaining the spindle in a locked position. These fasteners are available in different thread sizes ranging from M2 to M16. Besides, these rivets are also available in 5/40 X 3/8, 6/32 x 1/4, 6/32 x 5/16 and 6/32 x 3/8 alloy steel; A2 and A4 stainless steel as well. All these models comply with industry standards.

To facilitate more, the dog point set screws are enabled with high precision machining process. Through this feature, a general tolerance level of ±0.13  mm is conveniently achieved. This kind of high level of accuracy makes these set screws suitable for high precision applications. These types of rivets are also available in other finishes, various other thread sizes and are flexible enough to be modified to suit the customers’requirement.

Specifications

  • Dimensions: ASME B18.3
  • Material &Mechanical Properties: ASTM F912.
  • Diameter:  3/16 ,1/4, 5/16,  3/8
  • Thread requirements: ASME B1.1, Class 3A, UNC and UNF.
  • Finish: Black Oxide (Thermal or Chemical)

#Half dog point screws – Like full dog point set screws, these rivets also feature a flat tip, protruding out from one end. This flat tip is typically located within a shaft groove on the fastener and it helps in the rotation of the shaft, whilst still retaining compression and holding both objects in place. These metal pieces are mostly used for permanent rotating part settings.

These screws are developed from high grade alloy and stainless steel, sourced from trusted vendors. Stores like Mutual Screw offer these screws in various finishes and dimensions, so as to suit every individual’s requirements in different applications. These set screw are used in various oil & petrochemical plants, especially because of their special non-electrolyte plating like geometer and dacromet features.

Specifications

  • Standard: DIN 564
  • Diameter: M6-M36
  • Length: 10 mm – 250 mm
  • Material: Alloy, stainless steel
  • Finish: Zinc trivalent, hexavalent, zinc flake, hdg, blackening

Both the full dog point set screws and half dog point screws are equipped with an extended tip that fits into a hole drilled in a shaft. This feature is used in permanent location while attaching one part to another. Sometimes, these tips are even replaced with dowel pins. Both of these set screws are also used as adjusting screws and are ideal for thin wall and soft plugs. These are specially designed for frequent resetting and relocating purposes.

#Cup point set screw – It is another most commonly used type of set screw. It features a cup-shaped dent on one end and is mostly used for temporary assembly or quick projects. The cup point feature is the major highlight of such kind of set screw, as its round surface offers excellent resistance and a strong grip.

This set screw is designed by dexterous engineers, who assure that these fastening products are developed in strict compliance with the industry standards and norms. Moreover, these products are widely popular in the market because of their corrosion resistant characteristic, dimensional accuracy and longer service life.

Specifications

  • Standard ISO 4029, DIN 916, BS.4168, 818.3.6, WB18.3, JIS 811.77
  • Diameter: M4 to M24, 3116″ to 1″
  • Length: 5 mm to 60 mm, 3/16″ to 2 ½”
  • Material: Alloy, stainless steel
  • Finish: Thermal black only
#Flat point set screw – This screw features a flat surface on one end and is the simplest and least expensive of all the types of set screws. A flat point of set screw is appropriate in situation where the set screw is required to press completely flat against a surface, so as to create compression.
This kind of fastener is excellent for projects, which demand frequent relocation rather than than permanent positioning.

Set Screws: Mutual Screw’s New Range of Fasteners

The Mutual Screw and Supply, a leading hardware supply chain has recently launched a whole new range of set screws, which are even easier and efficient to use. The company is quite confident about its newly launched products, as these are specially designed to lessen the burden of their clients.

Set Screws

Already a pioneer in the hardware world of US, the Mutual Screw is aiming at spreading its wings to the other parts of the globe by initiating a big launch this time. Online, being the best way of branding, the company is all set to target the global audience through its exclusive range of supplies.

The Mutual Screw is also planning to launch several other types of fasteners, enabled with more advanced features and functionalities. In order to beat the rat race, the company has geared up to compete with its own line of existing models. The company is already a leading brand in the US market and now it is intending to hit the global market as well, by implementing some effective online marketing strategies. Apart from all these, the products are going to become a huge hit, as soon as they are launched.

This new launched item includes Sheet Metal Set Screws, Self Tapping Screws of Types A, AB & B. Around 20-22 more new models would be introduced to the market, thereby easily enabling any hardware job. The models feature stainless steel, steel black oxide finish, steel zinc plated and steel zinc yellow flat head types.

All the external dimensions of these tapping screws would be metric, including the external fasteners and lifting screw. These new set screws will be specifically useful for the North American original equipment manufacturers (OEMs), which serve Asian and European customers.

The company’s existing products function at full capacity, no matter whether the load is in compression or tension. Their aluminium or bronze worm gears, heat treated alloy steel shafts; ball bearings and tapered roller enable rugged precision and are handy enough to be used by a beginner as well.

The company has always emphasized on creating varied designs, so as to satisfy every customer’s needs and taste. The supplies are available in translating as well as in keyed patterns. The jacks can be easily set up by a protective boot. In addition to, the company also develops customized products so as to meet the special requirements.

Dog Point Set Screw: The Most Commonly Used Set Screw

A socket set screw is a specific type of threaded fastener, which usually does not feature a head. Unlike other kind of commonly used rivets, this metal piece is basically an adjustment device generally used to develop axial chunk. Such kind of screw comes handy and is used for multiple uses. Plus, it is also available in various types, the most common type, being the dog point set screw.

Such type of fastener is used to clutch body parts like collar, gear, sleeve, coupling etc. into an axle, so as to prevent relative oscillation. The socket feature helps such kind of screw to effectively rotate in a desired direction. The sockets are available in various types, including fluted socket, square head, screwdriver slot, hexagon socket and much more in the list.

You should always consider the point of your fastener before purchasing it. You should know which model is suitable for your job. The point of a rivet is the area, which rotates against the shaft during penetration. The point selection is usually done by determining the nature of the functionality. The point is available in various types, which are as follows:

Dog Point Set Screw:

It is the most common type, mostly used for fixing into any permanent location of one surface to the other. It features a broad flattened end, followed by its angular threads ending before just above the tail. The fastener’s end is placed in the already drilled hole in shaft or on a flat surface. It is often replaced with the dowel pinions and always works well against the must rugged surface or hollow tubing.

Flat type:

Such kind of point is used on those surfaces, where parts are always replaced or re-set. IN this frequent application, such kind of point helps prevent damage or any kind of wear and tear.

Knurled Cup:

This type of point is used for permanent locations, including collars, gears, knobs, pulleys and shafts. This particular head is able to resist more amount of vibration.

Plain Cup:

This point is used for style set screw. It is usually used in permanent as well as fluctuating locations mainly on shaft, featuring hardness differential of 10-15 Rockwell C points and in those areas, where the cutting of the cap is acceptable.

You can select any of these above set screws, determining the nature and requirement of your job.