Compressed Length / Free Length Conversion Chart
for Raymond Die Springs

Free
Length		 Medium Duty
Deflection		 Medium-Heavy
Duty Deflection		 Heavy Duty
Deflection		 Extra-Heavy
Duty Deflection
25% 35% 40% 20% 25% 30% 15% 20% 25% 15% 17% 20%
1 0.75 0.65 0.60 0.80 0.75 0.70 0.85 0.80 0.75 0.85 0.83 0.80
1-1/4 0.94 0.81 0.75 1.00 0.94 0.88 1.06 1.00 0.94 1.06 1.04 1.00
1-1/2 1.13 0.98 0.90 1.20 1.13 1.05 1.28 1.20 1.13 1.28 1.25 1.20
1-3/4 1.31 1.14 1.05 1.40 1.31 1.23 1.49 1.40 1.31 1.49 1.45 1.40
2 1.50 1.30 1.20 1.60 1.50 1.40 1.70 1.60 1.50 1.70 1.66 1.60
2-1/2 1.88 1.63 1.50 2.00 1.88 1.75 2.13 2.00 1.88 2.13 2.08 2.00
3 2.25 1.95 1.80 2.40 2.25 2.10 2.55 2.40 2.25 2.55 2.49 2.40
3-1/2 2.63 2.28 2.10 2.80 2.63 2.45 2.98 2.80 2.63 2.98 2.91 2.80
4 3.00 2.60 2.40 3.20 3.00 2.80 3.40 3.20 3.00 3.40 3.32 3.20
4-1/2 3.38 2.93 2.70 3.60 3.38 3.15 3.83 3.60 3.38 3.83 3.74 3.60
5 3.75 3.25 3.00 4.00 3.75 3.50 4.25 4.00 3.75 4.25 4.15 4.00
5-1/2 4.13 3.58 3.30 4.40 4.13 3.85 4.68 4.40 4.13 4.68 4.57 4.40
6 4.50 3.90 3.60 4.80 4.50 4.20 5.10 4.80 4.50 5.10 4.98 4.80
6-1/2 4.88 4.23 3.90 5.20 4.88 4.55 5.53 5.20 4.88 5.53 5.40 5.20
7 5.25 4.55 4.20 5.60 5.25 4.90 5.95 5.60 5.25 5.95 5.81 5.60
7-1/2 5.63 4.88 4.50 6.00 5.63 5.25 6.38 6.00 5.63 6.38 6.23 6.00
8 6.00 5.20 4.80 6.40 6.00 5.60 6.80 6.40 6.00 6.80 6.64 6.40
10 7.50 6.50 6.00 8.00 7.50 7.00 8.50 8.00 7.50 8.50 8.30 8.00
12 9.00 7.80 7.20 9.60 9.00 8.40 10.20 9.60 9.00 10.20 9.96 9.60