Compression
General Information Required
- Type of material (this can be discussed or described if not sure)
- Wire diameter
- Outer diameter of the spring
- Total coils (TC), as described below
- Direction of wind (normally not an issue)
- Type of ends
- Free or relaxed length of spring
- Quantity of springs required
Definition
Body Shapes
They may be cylindrical (straight body), conical (cone shaped), barrel shaped, concave (hour glass), or a combination of body shapes and can be coiled either left or right hand wound (LHW, RHW)
Cylindrical (straight)
Conical (cone)
Barrel
Concave (Hour glass)
Direction of Wind
Counting Coils
All coil springs have Active Coils (AC) and Total Coils (TC).
Total Coils (TC) – Represent all the coils in the spring.
Active Coils (AC) – Means what the name implies, the coils that actually deflect or extend (move).
There are many different end configurations to compression springs. Listed below are four that are commonly used and how to count their coils. When ordering these, most spring makers would only require to know the total coils and type of ends.
Most Common Types of Ends
Counting Coils: TC-2 = AC
Closed Ends Ground (CEG) – This type of end is especially useful when small load tolerances or minimal buckling is required. It provides more uniform loading and can stand upright without tipping.
Counting Coils: TC-2 = AC
CEG
Plain/Open ends Ground or Not Ground (OEG, OENG) – These ends are rarely used due to the fact that they do not exert uniform loads, cannot stand straight on their own and they become entangled when batched together.
Counting Coils:
Open Ends Not Ground (OENG) Ends are typically full pitched. Full pitch can be defined as the spacing between the point at which the spring is trimmed to the next coil being equal to the spacing of the coils in the body of the spring. The calculation for this spring is TC = AC
Open Ends Ground (OEG) These ends are also typically full pitched and because these ends are ground, the ground portions deflect, or move easier than if they were not ground. The calculation for this spring is TC – 1 = AC
OENG OEG
Detailed Coil Count Diagram For Typical CEG Spring
COMPRESSION SPRINGS
SPECIFICATION FORM
General Information Required
- COMPLETE FORM AND SEND TO ADDRESS BELOW WITH QTY’S REQUIRED
- SEND IN YOUR TECHNICAL INFORMATION/ DRAWINGS
- OR JUST CALL/E-MAIL
