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COMPRESSION SPRINGS

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Banding - Strapping | Burn Barrels |Casters | Chain Link Fencing | Conveyor Rollers | Door Trolley
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Compression Spring Technical Information

 

Compression Spring Terminology

Compression Spring Terminology

Formulas for Spring Characteristics

 

Symbol

Meaning

 

 

 

R =

Rate per Inch

 

 

 

P =

Load in pounds

 

 

 

S =

Stress (uncorrected)

 

 

 

H =

Solid height

 

 

 

G =

Torsional modulus of elasticity

 

 

 

p =

Pitch

 

 

 

M =

Moment or torque, in-lb

 

 

 

E =

Modulus of elasticity

 

 

 

n =

Active coils

 

 

 

N =

Total coils

 

 

 

D =

Mean diameter of coil

 

 

 

d =

Diameter of wire

 

 

 

p =

Pi, 3.14

 

 

 

L =

Free length

 

 

 

T =

Revolutions of spring

 

 

 

SK=

Corrected stress

 

 

 

Torsional Modulus of Elasticity Data

 

Steel

11.5 x 106

 

 

 

 

Stainless Steel

10 x 106

 

 

 

 

Chrome Vanadium

11.5 x 106

 

 

 

 

Chrome Silicon

11.5 x 106

 

 

 

 

Phosphor Bronze

6.25 x 106

 

 

 

 

Brass

5.5 x 106

 

 

 

 

Formula Key

 

Characteristic

Formula

 

Wire diameter (d)

d = 8PD
3    piS

 

Active Coils (n)

n = Gd4
      8RD
2

 

Uncorrected
Stress

S = 8PD  psi
piD
3

 

Spring rate (R)

R = (P2-P1)
       (L-L2)

 

By Type of Ends

 

Pitch (p)

Open

Open
Ground

Closed

Closed &
Ground

 

p = L-d
     n

p = L
      N

p = L-3d
     n

p = L-2d
    n

 

Solid height (H)

H = d(N+1)

H = dN

H=d(N+1)

H = dN

 

Active coils (n)

n = N

n = N-1

n = N-2

n = N-2

 

Total Coils (N)

N = L-d
     p

N = L
      p

N  = L-3D +2
p

N = L-2d +3
p

 

Free length (L)

L = (pN)=d

L = pN

L = (pn)+3d

L = (pn)+2d

 

"K" Factor

 

  K Factor

Springs | Extension Springs | Compression Springs | Torsion Springs  
Spring Materials | Spring Glossary  | Stove Handle Spring
Banding - Strapping | Burn Barrels |Casters | Chain Link Fencing | Conveyor Rollers | Door Trolley
Drawer Slides | Folding Steps | Gussets | Keystock | Locks | Marking Products | Nylon Slings
Packaging Supply  |  Roofing - Siding | Screw Conveyors - Augers | Shim Stock | Slotted Products
  Springs | Steel Framing | Tape | Pipe Hangers | Welding Accessories
Abrasive-Blade-Drill | Chain-Cable-Rope | Concrete Products | Hinge-Hasp-Latch | Ornamental
Paint-Solvent-Oil | Pipe Fittings | Tools | Misc Hardware | Safety Products | Simpson Strong Tie
 

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*FREE ZONE ($100 MINIMUM ORDER) = EVERY WEEKDAY  (CALIFORNIA, USA ONLY)
SELECTED AREAS OF OROVILLE, DURHAM, CHICO, CORNING, RED BLUFF, ORLAND, WILLOWS, PRINCETON
COLUSA, LINCOLN, WHEATLAND, YUBA CITY, MARYSVILLE, LIVE OAK, GRIDLEY & BIGGS

*FREE ZONE ($500 MINIMUM ORDER) = ONCE WEEKLY (CALIFORNIA, USA ONLY)
SELECTED AREAS OF GRASS VALLEY &  NEVADA CITY

PAPERBACK  /  56  B&W PAGES  /  5.5" x 8.5"
CONTAINS SIZES, DIMENSIONS & WEIGHTS OF BASIC SHAPES IN MILD STEEL
LIKE ANGLE, CHANNEL, FLAT, TUBE, SHEET, PIPE, BEAM, ETC  
SOME BASIC INFO ON CHEMISTRY & MECHANICAL PROPERTIES FOR MILD STEEL ITEMS
SOME BASIC FORMULAS, TOLERANCES & DECIMAL CHARTS

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