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Sizing a Spiral

Most of the people we've met have wanted to know how to size a spiral, but no supplier has ever taken the time to tell them. We think this is a mistake because the more you know about the sizing procedure the better you become at selecting a spiral which will work for you.

First, in sizing a spiral, the production rate should control and not the space available. Take your existing production rate and see what size spiral is needed. Use our engineering section to "walk you through this simple process".

Try to stay with the same spiral belt width as your infeed belt (unless you are transpositing at 90 degrees) to the spiral.

Stay away from using an existing straight line conveyor length as the length needed for a spiral, it never works, as the spiral lengths have to be 45% longer.

Stay away from calculating grouped length of products which have gaps between them, you are wasting valuable processing space by not maximizing the spiral belts occupancy.

If your ceiling heights come out to low for what you calculate, don't throw out the idea of using a spiral, our spiral designs allow for low ceiling conditions while getting the belt lengths you need.

We help you see what is needed very quickly. Here is the formula, guard it with your life.

Take the product length of what you are running, multiply by 1.45(this is the collapse factor of the radius belt that is used on a spiral), multiply this by the minutes of dwell time you want, multiply this by the pieces per minute that you will run. Now take that number and divide by 12 then by the number of pieces across the belt width you will have.

We have in our engineering section each step that is necessary to see what exactly you need both in belt lengths and floor space needed for spirals, check it out.

On your next spiral-sizing project, contact us after you have run through the calculations, we will verify the lengths for you at no charge.