Index



Conversion Charts

Definitions

 
  1. The traditional weight of sailcloth in "sailmakers’ ounces" is the weight of fabric 28.5" wide by 36" long.
     
  2. "Sailmakers’ Ounces" are also known as "US Ounces".
     
  3. Ounces per square yard are also known as "UK Ounces".
     
  4. Denier is a measured yarn weight. It is equal to the weight of 9000 meters of yarn measured in grams.
     
 


Conversion Charts - Fabric

 
To Convert Into Multiply By
Sailmaker’s Ounces (US oz) Ounces/Square Yard (UK oz) 1.263
Sailmaker’s Ounces (US oz) Grammes/Square Metre 42.83
Grammes/Square Metre Sailmaker’s Ounces (US oz) 0.0233
Grammes/Square Metre Ounces/Square Yard (UK oz) 0.0295
Ounces/Square Yard (UK oz) Sailmaker’s Ounces (US oz) 0.792
Ounces/Square Yard (UK oz) Grammes/Square Metre 33.91
 


Conversion Charts - Weight

 
To Convert Into Multiply By
Ounces Grammes 28.35
Pounds Kilogrammes 0.4536
U.S. Tonnes Metric Tonnes 0.9072
U.S. Tonnes Imperial Tons 0.8929
Grammes Ounces 0.0353
Kilogrammes Pounds 2.2046
Metric Tonnes U.S. Tonnes 1.1023
Metric Tonnes Imperial Tons 0.9842
 


Conversion Charts - Length

 
To Convert Into Multiply By
Inches Millimeters 25.4
Feet Metres 0.3048
Yards Metres 0.9144
Miles Kilometres 1.609
 


Conversion Charts - Area

 
To Convert Into Multiply By
Square Yards Square Metres 0.836
Square Metres Square Yards 1.196
 


Conversion Charts - Volume

 
To Convert Into Multiply By
U.S. Gallons Imperial Gallons 0.8326
U.S. Gallons Litres 3.785
Cubic Feet U.S. Gallons 7.481
Cubic Feet Litres 28.317
Litres U.S. Gallons 0.2642
Litres Imperial Gallons 0.220
Litres Cubic Feet 0.0353
 


Conversion Charts - Needle Sizes

 
NEEDLE/SIZE GUIDE
V30 = No75 = needle 75/90
V46 = No50 = needle 80/90
V69 = No36 = needle 90/110
V92 = No25 = needle 110/130
V138 = No20 = needle 130/160
 


Conversion Charts - Material Grades

 

Unless otherwise specified, all stainless steel quoted in this catalogue is Type 316 marine grade. Plastic products, when used for loaded applications are generally manufactured using Nylon 6, Nylon 66 or Acetal. Non loaded products are generally manufactured in polypropylene.

 

We can advise on the suitability of plastic for various applications where a choice of material is available.

 


Conversion Charts - Loading Assumptions

 

Breaking Loads are for guidance only and do not form part of any warranty. All loads are quoted assuming a straight pull using shackles to secure the test equipment. Where the load on a buckle is not straight the strength could be reduced.

 

Where formulas have been used to obtain a components breaking load etc. an ultimate tensile stress has been assumed of:

 
500N/mm2 for stainless steel
300N/mm2 for aluminium
350N/mm2 for carbon steel
 

In many tests where buckles, D rings, etc. have been pulled using webbing, failure of the webbing occurs before the buckle reaches its Breaking Load. Test data is available on request and tests can be made on customer’s applications if required. Buckles are used in a variety of applications and the factor of safety for Safe Working Loads may vary. Our recommendation is that the safe working load be one fifth of the Breaking Load.