01.2024 3 l 1 l 2 l l L F subject to alterations d s 0l 2d 3d 241.18. Pillar-Ø d1 HELICAL SPRING FOR BALL CAGE RETENTION Calculation: Formula for selecting spring 241.18.: FL = [l - (l2 + (l1 - l3))] x 1,1 Formula for calculating the block length LBL of the selected spring: LBL = ( l0 x d : s) + 2 x d FL = Length of compressed spring l = Length of guide pillar (Customer specified) l1 = Cage length (Customer specified) l2 = Compression length of guide pillar (Customer specified) l3 = Cage retainer size (Customer specified) 1.1 = Safety factor l0 = Length of uncompressed spring d = Spring wire diameter s = Pitch Without ball cage retainer With ball cage retainer 202.91. With ball cage retainer 202.91. Mounting example Without ball cage retainer With ball cage retainer 202.92.1. With ball cage retainer 202.92.1. Mounting example Ordering Code (example): Helical spring for ball cage retention = 241.18. Inner diameter d2 40.5 mm = 405. Length l0 60 mm = 060 Order No = 241.18. 405. 060 241.18. Helical spring for ball cage retention d1 d2 d3 s d l0 Gradation l0 19/20 20.5 22.5 14 1 40 - 140 10 24/25 25.5 27.9 14 1.2 40 - 160 10 30/32 32.5 35.7 16 1.6 50 - 230 10 38 38.5 42.5 18 2 60 - 230 10 40 40.5 45.1 20 2.3 60 - 230 10 48/50 50.5 55.7 20 2.6 70 - 280 10 60 60.5 66.9 20 3.2 80 - 250 10 63 63.5 69.9 20 3.2 80 - 250 10
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