Manufacture of Small and Medium Motors

SANDMARK has recently supplied a family of motors used in laboratory equipment. These motors have particular requirements to operate with minimal noise and vibration. In addition, the design incorporates thrust construction allowing the operation of these motors in any position.

The motors are designed to operate in 3 voltages: 100 VAC, 120 VAC, and 230 VAC.

sandmark motor 01  sandmark motor 02

Make or Buy Considerations for Manufacturing

Make or buy considerations for manufacturing of products, components, and turnkey systems may not always be straightforward. Some reasons to consider SANDMARK as a supplier for your sub-assemblies and assemblies can be:

Equipment you don’t need – Even simple assemblies can require expensive equipment.
Space and Personnel – Can a particular area and its employees be better utilized in another area of the plant.
Carrying costs of material inventory
Freight charges can add up – Is it cheaper to ship one pallet of parts (assemblies) or to ship 25 boxes of components from different suppliers.
Less expensive labor costs – In low cost regions like India and China, the labor and value-add cost is just plain cheaper. If your components are coming from overseas, it makes sense to have the assembly done there too.

Some assemblies and systems supplied by SANDMARK:

SANDMARK Design Engineering Digital Dry Bath Single Block Version SANDMARK Design Engineering Digital Dry Bath Double Block Version SANDMARK Assemblies Slider Assembly Automation Clamp2 SANDMARK Assemblies Motor2 SANDMARK Assemblies Turnkey Machinery


Design of Innovative Solar Panel Mounting Systems

SANDMARK has successfully completed a project in which our team was participated in the design, analysis and prototyping of innovative mounting systems and structural members for solar panels and arrays.

The primary design goals for this project were that the mounting systems be highly condusive to automated installation and optimized for large scale manufacturing.

SANDMARK Design Engineering Stress Analysis on a Column Structure           SANDMARK Design Engineering Stress Analysis on a Clamp

SANDMARK Design Engineering Clamping System Design for Solar Farms                SANDMARK Design Engineering Design of Large Scale Structural Systems for Solar Farms

Supply of Automotive Pulleys for OEM Customer

SANDMARK has successfully qualified and is now manufacturing production quantities of pulleys for an OEM customer. The material used for this family of pulleys is cast steel. Blanks are first cast using shell-mold sand casting process, which provides considerably higher quality than a standard green sand casting process with the type of surface finish and material strength that the application requires. The blanks are then machined to specifications. After machining, each pulley is dynamically balanced to meet the performance requirements at their rated rotational speeds.

These pulleys are used in automotive applications and each pulley is expected to have zero defects, low imbalance, and very long operational life in demanding environments, operating 24/7 for extended periods of time. As such, the products undergo vigorous quality inspection and testing procedures before they are shipped to our Customer.

  bus parts pulley 01    bus parts pulley 02

Machining of Very Large Shafts (Fabricated, Forged, or Cast)

SANDMARK has been manufacturing and supplying shafts of all sizes to a range of customers since the past decade. In particular, large shafts that have demanding requirements is a SANDMARK core competency.

The first step to manufacturing large shafts is the production of ‘blanks’. Blanks can be produced using either a casting, forging, or, in some cases, fabrication process. The choice depends on a variety of factors such as material, size, functional requirements, and product specifications.

Castings are a common process for producing blanks.  Because of the high functional demands of these products, the castings should be of very high quality with no defects. An excellent casting process for manufacturing shafts is cylindrical casting or spin casting.  No weld-repairs are allowed for these cast blanks.

Forged blanks are much stronger than castings, but there are limitations to the size of forged blanks that can be commonly produced.

The secondary operations for the blanks are typically precision turning and grinding operations.

As a final step after the secondary operations, the shafts may be dynamically balanced based on their functional requirements.

Some shafts are comprised of dissimilar materials that are welded together. The welding specifications for these shafts are very tight and each part is subjected to intense quality control at each process step.


SANDMARK Mechanical Shaft2  SANDMARK Mechanical Shaft1