Sneha Bearings Private Limited

Sneha make Disc Spring Hanger Assemblies are designed to hang the vessels which are subjected to vertical movement due to change in temperature etc. Variable spring hanger provide continuous support for the vessel in all positions permitting their vertical movement.
 
Pre Compression :
 
The disc springs are pre-compressed into the hanger casting. This leads to following advantages,
• Saves up to 50% in the head room by reducing the hanger length.
• Reduces the installed height of overall hanger assembly.
• Prevents the spring supporting force from exceeding the normal safe limits of variation.
• Saves erection time because spring is pre-compressed to the working range.
 
Protection :
 
• Metallic cover is provided to protect from ingress of dirt, dust etc. into the assembly before installation.
• For corrosive applications all parts except spring are electro - galvanized and / or coated with epoxy paint.
  Graphite grease is applied on spring

These pot bearings are needed to transfer the vertical forces from one structural member to another. Our pot bearings are also required to restrict or permit linear movement. Where horizontal movement is restricted, the horizontal movement will be transferred through bearing to the lower structure.

These heavy duty rocker bearings are needed to transfer the vertical forces from one structural member to another. Our heavy duty rocker bearings are also required to restrict or permit linear movement. Where horizontal movement is restricted, the horizontal movement will be transferred through bearing to the lower structure.

Sliding bearings are generally used where larger structural movements are anticipated or when the horizontal movement is accommodated with a minimum stress transmitted to the structure. There are variety of sliding bearings that can be combined to give a complete support. The basic element of the sliding bearing is a PTFE Sheet (Polytetrafluroethylene) confined to the base material (which is generally a mild steel) by the process of bonding. A polished stainless steel plate welded to the underside of the top plate slides over the PTFE Sheet, such units in different combinations are commonly used in bridge's. viaducts and wide variety of other structures.

Rotary air lock feeders have wide application in industry wherever dry free flowing powders, granules, crystals or pallets are used. Typical materials handled with sneha units include cement, sugar, minerals, grains, plastic, dust, fly ash, flour, gypsum, lime, coffee and cereals.

Construction of spherical bearings can be hydrostatic or strictly mechanical. A spherical bearing by itself can consist of an outer ring and an inner ring and a locking feature that makes the inner ring captive within the outer ring in the axial direction only. The outer surface of the inner ring and the inner surface of the outer ring are collectively considered the raceway and they slide against each other, either with a lubricant or a maintenance-free polytetrafluoroethylene (PTFE) based liner.

Application:

Spherical bearings are used in countless applications, wherever rotational motion must be allowed to change the alignment of its rotation axis. A prime example is a tie rod on a vehicle suspension. The mechanics of the suspension allow the axle to move up and down, but the linkages are designed to control that motion in one direction only and they must allow motion in the other directions. Spherical bearings have been used in car suspensions, driveshafts, heavy machinery, sewing machines, and many other applications.

Bearings are needed to transfer the vertical forces from one structural member to another. They are also required to restrict or permit linear  movement. Where horizontal movement is restricted, the horizontal force will be transferred through bearing to the lower structure.
Application :

SNEHA make PTFE and SS Bearings have wide applications in the field of :
Bridges : Plate grinder, Truss, Arch, Suspension Cable Stayed, Movable
Structural : Building, Sports Complex, Auditoriums, Pipe Supports, Vessel Supports, Gantry Supports.
Pollution Control : Precipitators, Bag houses, valves, Ducts.
Off Shore : Platforms, Turn Tables, Crain Pivot.
Oil & Chemical Refinery Equipments : Heat Exchangers, Pipe lines, Hanger Bearings.

Properties of PTFE :

The wonder material PTFE (Polytetrafluroethylene) possesses following properties

Application :

Chemically inert
Low coefficient of friction
High wear resistance
Immune to almost all known solvents
Can operate over wide range of temperature.

Friction :

The exact value of coefficient of friction can not be quoted, since it depends on many factors, some of the major governing factors are :
Unit Loading.
Surface finish of mating parts.
Temperature.
Speed of movement.
Period under load without movement.

The dynamic coefficient of friction can be as low as 0.005, but for design considerations the coefficient of friction is taken as 0.05.

Advantages of PTFE / S.S. Bearings :

Low coefficient of friction.
No maintenance required.
No lubrication required.
Life Long.
High Load carrying capacity.
Compact in size.

Testing :

The wonder material PTFE ( Polytetrafluroethylene ) possesses following properties
Sample bearings are tested for 1.25 times design load capacity
A pair of bearings, selected at random is tested for coefficient  of friction.
Sample bearings also tested for permissible rotation.

All the tests are carried out on finished products in house on sophisticated test rig.