Spring Mounts Damped Type To 200 lbs. CO MP O NE NTS MATERIAL: Base Plate Mild Steel Spring igh-tensile Steel - Phosphated & Dyed Black End Cap Cast Light Alloy STAINLESS STEEL MES FOR LOADS OF 60 TO 200 POUNDS (27 TO 90 ) 4.7 (6) 3.46 (88) 2 OLES Ø.40 (.2) 2.95 (75) 3/8-6 UNC-2B x /2 DEEP 2.52 (64) CARACTERISTICS Lateral to vertical stiffness ratio approximately :..007 oz. (0.2 g). Damping factor c/c o. to.5. MEDIUM-EAVY INDUSTRIAL EQUIPMENT OPTICAL EQUIPMENT LABORATORY EQUIPMENT Static Load TEMPERATURE: -94 F to +347 F (-70 C to +75 C) z in. - eight mm Max.Load In. mm VZ30-2273 60 90 27 40 VZ30-2274 90 35 40 6 2 2-/2 5.7 45 3 76 VZ30-2275 35 200 6 90 Rev: 9--07 SS 5-9
Spring Mounts Damped Type To 750 lbs. MATERIAL: Mounting Plates Mild Steel, Painted Springs igh-tensile Steel; Phosphated, Dyed Black Isolators Knitted Stainless Steel Mesh STAINLESS STEEL MES FOR LOADS OF 50 TO 750 POUNDS (68 TO 340 ) X X 3-3/4 (95.3) 4-/2 (4.3).563 (4.3) DIA. /2-20 UNF.260 (6.6) DIA. SECTION X-X CARACTERISTICS.007 oz. (0.2 g). Damping factor c/c o.5 to.20. EAVY LOADS TEMPERATURE RANGE: -94 F to +347 F (-70 C to +75 C) - eight Static Load Max. Load z in. mm in. mm VZ3-246 50 260 68 8 VZ3-2462 250 450 3 205 4 4-/2 3.0 76.2 2.378 60.4 VZ3-2463 440 750 200 340 5- S E C T I O N 5
Selection Criteria VZ32 Mounts INDUSTRIAL AND MARINE The following table gives recommended isolation efficiency in relation to site configuration and driving motor power. If site configuration is not known, assume for basement condition. Transfer the recommended efficiency to the transmissibility curves on the graph. Driving Motor, kw Up to 4 4 30 30 75 75 225 Recommended Isolation Efficiency: Basement or Ground Floor 50% 80% Upper Floor eavy Construction 50% 75% Upper Floor Light Construction 93% 97.5% 98.5% EXAMPLE Project a line from the efficiency required on the right - hand side to intersect the performance lines, 06 and. Project those intersections down to obtain the two dimensionless ratios (R) for the three mountings. Divide the lowest running speed (z) of the complete machine by R to give the natural frequency f ' n required. Compare f ' n with the actual natural frequency (f n ) of the mounting concerned. If f' n fits into the f n band of the mounting, select that mounting. If two mountings meet the above conditions, select the one with higher f n ; it will be more stable. A fan turning at 980 rpm (6.3 z) driven by a 7 kw motor running at 470 rpm, which is to be installed on an upper floor of light construction: Recommended efficiency = 93% first projection gives R = 5.5 for and from f n = f, f n = 6.3 = 2.96 z R 5.5 discard as it has f n = 9 to 7 z second projection gives R = 4 for 06 & again f n = 6.3 = 4.08 z 4 which fits, f n = 5 to 3 z Now, all that remains is to place sufficient series mountings under the machine to support its weight evenly. TRANSMISSIBILITY (T) VZ32-06 & 5- VZ32-40% 80% 93% 0.00 0.5 2 3 4 5 6 7 8 9 20 30 40 50 60 70 80 0 f ROTATION SPEED OF MACINERY (z) (R) FREQUENCY RATIO = = f n NATURAL FREQUENCY (z) 98.5% 99% S E C T I O N 5
Spring Mounts Damped Type To 235 lbs. CO MP O NE NTS MATERIAL: Mounting Plate Mild Steel, Painted Spring igh-tensile Steel; Phosphated, Dyed Black 3.07 (78) STAINLESS STEEL MES FOR LOADS OF 66 TO 235 POUNDS (30 TO 560 ) 3-5/6 M2 x.75 4.33 () 5-33/64 (40) TEMPERATURE: -94 F to +347 F (-70 C to +75 C) 2 OLES Ø.433 () Loaded TRANSMISSIBILITY z TYPICAL TRANSMISSIBILITY PERFORMANCE CURVE 06 Equivalent Static Deflection Static Load Range 2 20 0 FORCING FREQUENCY RATIO = NATURAL FREQUENCY CARACTERISTICS.007 oz. (0.2 g). Damping factor c/c o.5 to.20. EAVY LOADS Must be loaded vertically through its axis. VZ32-65 243 75 VZ32-2 209 287 95 30 VZ32-3 VZ32-4 5.67 (44) 4.88 (24) 3 5.394.8 ( 30) 276 353 353 507 25 60 60 230 VZ32-5 463 683 2 3 VZ32-6 66 926 300 420 VZ32-06 66 30 50 VZ32-062 76 50 80 VZ32-063 VZ32-064 3.70 (94) 3.46 (88) 5 7.97.394 (5 ) 76 275 276 430 80 25 25 95 VZ32-065 430 683 95 3 VZ32-066 683 926 3 420 VZ32-88 87 40 85 VZ32-2 43 246 65 25 VZ32-3 VZ32-4 3.70 (94) 3.46 (88) 7 9.8.97 (3 5) 243 49 386 595 90 75 270 VZ32-5 55 882 250 400 VZ32-6 794 235 360 560 Rev: 9--07 SS 5-2
Spring Mounts Damped Type To 2469 lbs. MATERIAL: Mounting Plates Mild Steel, Painted Springs igh-tensile Steel; Phosphated, Dyed Black STAINLESS STEEL MES FOR LOADS OF 860 TO 2469 POUNDS (390 TO 20 ) Ø3-/6 (78) M2 x.75 4 OLES Ø.52 (3) 3-5/6 TRANSMISSIBILITY TYPICAL TRANSMISSIBILITY PERFORMANCE CURVE 06 8.27 (2) 9-27/32 (250) 2 20 0 FORCING FREQUENCY RATIO = NATURAL FREQUENCY CARACTERISTICS.007 oz. (0.2 g). Damping factor c/c o.5 to.20. EAVY LOADS TEMPERATURE: -94 F to +347 F (-70 C to +75 C) Loaded z Equivalent Static Deflection Static Load Range VZ32-25 VZ32-26 5.82 (48) 5.04 (28) 3 5.394.8 ( 30) 860 367 323 852 390 620 600 840 VZ32-0625 VZ32-0626 3.94 3.54 (90) 5 7.97.394 (5 ) 860 367 367 852 390 620 620 840 VZ32-25 VZ32-26 3.94 3.54 (90) 7 9.8.97 (3 5) 2 764 587 2469 500 800 720 20 5-3