LS.VAVibration-damping levelling feet

Vibration-damping levelling feet

Technopolymer base, steel stem, PUR damping element

Technical datasheet

LS.VA

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Catalogue	Description	D	d	d₁	l	l₁	l₂	h	s	Articulation Ø	l₂ 0 [N/mm²]	l₂ 0.4 [N/mm²]

341612	LS.VA-32-8.5-M8x43	32	M8	23.1	43	21.5	5.3	15	10	8.5	5.3	4.8
341616	LS.VA-32-8.5-M8x68	32	M8	23.1	68	21.5	5.3	15	10	8.5	5.3	4.8
341622	LS.VA-32-8.5-M10x43	32	M10	23.1	43	21.5	5.3	15	10	8.5	5.3	4.8
341626	LS.VA-32-8.5-M10x68	32	M10	23.1	68	21.5	5.3	15	10	8.5	5.3	4.8
341632	LS.VA-32-8.5-M10x98	32	M10	23.1	98	21.5	5.3	15	10	8.5	5.3	4.8
341722	LS.VA-32-8.5-M12x43	32	M12	23.1	43	21.5	5.3	15	12	8.5	5.3	4.8
341726	LS.VA-32-8.5-M12x68	32	M12	23.1	68	21.5	5.3	15	12	8.5	5.3	4.8
341732	LS.VA-32-8.5-M12x98	32	M12	23.1	98	21.5	5.3	15	12	8.5	5.3	4.8
342122	LS.VA-32-14-M8x43	32	M8	23.1	43	25	5.3	15	14	14	5.3	4.8
342126	LS.VA-32-14-M8x68	32	M8	23.1	68	25	5.3	15	14	14	5.3	4.8
342222	LS.VA-32-14-M10x43	32	M10	23.1	43	25	5.3	15	14	14	5.3	4.8
342226	LS.VA-32-14-M10x68	32	M10	23.1	68	25	5.3	15	14	14	5.3	4.8
342232	LS.VA-32-14-M10x98	32	M10	23.1	98	25	5.3	15	14	14	5.3	4.8
342322	LS.VA-32-14-M12x43	32	M12	23.1	43	25	5.3	15	14	14	5.3	4.8
342326	LS.VA-32-14-M12x68	32	M12	23.1	68	25	5.3	15	14	14	5.3	4.8
342332	LS.VA-32-14-M12x98	32	M12	23.1	98	25	5.3	15	14	14	5.3	4.8
342422	LS.VA-32-14-M14x68	32	M14	23.1	68	25	5.3	15	14	14	5.3	4.8
342432	LS.VA-32-14-M14x98	32	M14	23.1	98	25	5.3	15	14	14	5.3	4.8
342442	LS.VA-32-14-M14x148	32	M14	23.1	148	25	5.3	15	14	14	5.3	4.8
342522	LS.VA-32-14-M16x68	32	M16	23.1	68	25	5.3	15	16	14	5.3	4.8
342526	LS.VA-32-14-M16x108	32	M16	23.1	108	25	5.3	15	16	14	5.3	4.8
342542	LS.VA-32-14-M16x148	32	M16	23.1	148	25	5.3	15	16	14	5.3	4.8
342562	LS.VA-32-14-M16x168	32	M16	23.1	168	25	5.3	15	16	14	5.3	4.8
342612	LS.VA-40-8.5-M8x43	40	M8	30	43	23	6	17	10	8.5	6	5.6
342616	LS.VA-40-8.5-M8x68	40	M8	30	68	23	6	17	10	8.5	6	5.6
342622	LS.VA-40-8.5-M10x43	40	M10	30	43	23	6	17	10	8.5	6	5.6
342626	LS.VA-40-8.5-M10x68	40	M10	30	68	23	6	17	10	8.5	6	5.6
342632	LS.VA-40-8.5-M10x98	40	M10	30	98	23	6	17	10	8.5	6	5.6
342722	LS.VA-40-8.5-M12x43	40	M12	30	43	23	6	17	12	8.5	6	5.6
342726	LS.VA-40-8.5-M12x68	40	M12	30	68	23	6	17	12	8.5	6	5.6
342732	LS.VA-40-8.5-M12x98	40	M12	30	98	23	6	17	12	8.5	6	5.6
343122	LS.VA-40-14-M8x43	40	M8	30	43	25	6	17	14	14	6	5.6
343126	LS.VA-40-14-M8x68	40	M8	30	68	25	6	17	14	14	6	5.6
343222	LS.VA-40-14-M10x43	40	M10	30	43	25	6	17	14	14	6	5.6
343226	LS.VA-40-14-M10x68	40	M10	30	68	25	6	17	14	14	6	5.6
343232	LS.VA-40-14-M10x98	40	M10	30	98	25	6	17	14	14	6	5.6
343322	LS.VA-40-14-M12x43	40	M12	30	43	25	6	17	14	14	6	5.6
343326	LS.VA-40-14-M12x68	40	M12	30	68	25	6	17	14	14	6	5.6
343332	LS.VA-40-14-M12x98	40	M12	30	98	25	6	17	14	14	6	5.6
343422	LS.VA-40-14-M14x68	40	M14	30	68	25	6	17	14	14	6	5.6
343432	LS.VA-40-14-M14x98	40	M14	30	98	25	6	17	14	14	6	5.6
343442	LS.VA-40-14-M14x148	40	M14	30	148	25	6	17	14	14	6	5.6
343522	LS.VA-40-14-M16x68	40	M16	30	68	25	6	17	14	14	6	5.6
343526	LS.VA-40-14-M16x108	40	M16	30	108	25	6	17	14	14	6	5.6
343542	LS.VA-40-14-M16x148	40	M16	30	148	25	6	17	14	14	6	5.6
343562	LS.VA-40-14-M16x168	40	M16	30	168	25	6	17	14	14	6	5.6
343612	LS.VA-50-8.5-M8x43	50	M8	40	43	25	6	19	10	8.5	6	5
343616	LS.VA-50-8.5-M8x68	50	M8	40	68	25	6	19	10	8.5	6	5
343622	LS.VA-50-8.5-M10x43	50	M10	40	43	25	6	19	10	8.5	6	5
343626	LS.VA-50-8.5-M10x68	50	M10	40	68	25	6	19	10	8.5	6	5
343632	LS.VA-50-8.5-M10x98	50	M10	40	98	25	6	19	10	8.5	6	5
343722	LS.VA-50-8.5-M12x43	50	M12	40	43	25	6	19	12	8.5	6	5
343726	LS.VA-50-8.5-M12x68	50	M12	40	68	25	6	19	12	8.5	6	5
343732	LS.VA-50-8.5-M12x98	50	M12	40	98	25	6	19	12	8.5	6	5
344122	LS.VA-50-14-M8x43	50	M8	40	43	27	6	19	14	14	6	5
344126	LS.VA-50-14-M8x68	50	M8	40	68	27	6	19	14	14	6	5
344222	LS.VA-50-14-M10x43	50	M10	40	43	27	6	19	14	14	6	5
344226	LS.VA-50-14-M10x68	50	M10	40	68	27	6	19	14	14	6	5
344232	LS.VA-50-14-M10x98	50	M10	40	98	27	6	19	14	14	6	5
344322	LS.VA-50-14-M12x43	50	M12	40	43	27	6	19	14	14	6	5
344326	LS.VA-50-14-M12x68	50	M12	40	68	27	6	19	14	14	6	5
344332	LS.VA-50-14-M12x98	50	M12	40	98	27	6	19	14	14	6	5
344422	LS.VA-50-14-M14x68	50	M14	40	68	27	6	19	14	14	6	5
344432	LS.VA-50-14-M14x98	50	M14	40	98	27	6	19	14	14	6	5
344442	LS.VA-50-14-M14x148	50	M14	40	148	27	6	19	14	14	6	5
344522	LS.VA-50-14-M16x68	50	M16	40	68	27	6	19	16	14	6	5
344526	LS.VA-50-14-M16x108	50	M16	40	108	27	6	19	16	14	6	5
344542	LS.VA-50-14-M16x148	50	M16	40	148	27	6	19	16	14	6	5
344562	LS.VA-50-14-M16x168	50	M16	40	168	27	6	19	16	14	6	5
344612	LS.VA-60-14-M8x43	60	M8	50.5	43	33	5	24	14	14	5	3.9
344616	LS.VA-60-14-M8x68	60	M8	50.5	68	33	5	24	14	14	5	3.9
344622	LS.VA-60-14-M10x43	60	M10	50.5	43	33	5	24	14	14	5	3.9
344626	LS.VA-60-14-M10x68	60	M10	50.5	68	33	5	24	14	14	5	3.9
344632	LS.VA-60-14-M10x98	60	M10	50.5	98	33	5	24	14	14	5	3.9
344722	LS.VA-60-14-M12x43	60	M12	50.5	43	33	5	24	14	14	5	3.9
344726	LS.VA-60-14-M12x68	60	M12	50.5	68	33	5	24	14	14	5	3.9
344732	LS.VA-60-14-M12x98	60	M12	50.5	98	33	5	24	14	14	5	3.9
345122	LS.VA-60-14-M14x68	60	M14	50.5	68	33	5	24	14	14	5	3.9
345126	LS.VA-60-14-M14x98	60	M14	50.5	98	33	5	24	14	14	5	3.9
345222	LS.VA-60-14-M14x148	60	M14	50.5	148	33	5	24	14	14	5	3.9
345226	LS.VA-60-14-M16x68	60	M16	50.5	68	33	5	24	16	14	5	3.9
345232	LS.VA-60-14-M16x108	60	M16	50.5	108	33	5	24	16	14	5	3.9
345236	LS.VA-60-14-M16x148	60	M16	50.5	148	33	5	24	16	14	5	3.9
345242	LS.VA-60-14-M16x168	60	M16	50.5	168	33	5	24	16	14	5	3.9
345246	LS.VA-60-24-M16x58	60	M16	50.5	58	43	5	24	24	24	5	3.9
345252	LS.VA-60-24-M16x98	60	M16	50.5	98	43	5	24	24	24	5	3.9
345256	LS.VA-60-24-M16x138	60	M16	50.5	138	43	5	24	24	24	5	3.9
345262	LS.VA-60-24-M16x158	60	M16	50.5	158	43	5	24	24	24	5	3.9
345266	LS.VA-60-24-M20x98	60	M20	50.5	98	43	5	24	24	24	5	3.9
345272	LS.VA-60-24-M20x138	60	M20	50.5	138	43	5	24	24	24	5	3.9
345276	LS.VA-60-24-M20x158	60	M20	50.5	158	43	5	24	24	24	5	3.9
345282	LS.VA-60-24-M20x198	60	M20	50.5	198	43	5	24	24	24	5	3.9
345286	LS.VA-60-24-M24x98	60	M24	50.5	98	43	5	24	24	24	5	3.9
345292	LS.VA-60-24-M24x158	60	M24	50.5	158	43	5	24	24	24	5	3.9
345296	LS.VA-60-24-M24x198	60	M24	50.5	198	43	5	24	24	24	5	3.9

* See paragraph: Technical data and guidelines for the choice.

Base

Glass-fibre reinforced polyamide based (PA) technopolymer, black colour, matte finish.

Damping element

Polyurethane-based rubber (PUR), natural colour, hardness 50 Shore A.

Articulated stem

Threaded zinc-plated steel with regulation hexagon.

Features

Have been designed to damp vibrations, shocks and noises produced by moving bodies or non-balanced vibrating masses of equipment and machines which can cause:

malfunctioning and reduction of the machine lifespan and/or of the adjacent ones;

damage to operator’s health;

noise.

Order information

The levelling feet are supplied unassembled to make carriage and storage easier. The components (base and stem) are supplied in separate packing: less volume taken and better protection from scratches and dirt.

To order bases and stems separately, see:

table of possible combinations Bases/Stems.

the codes of the Bases

the codes of the Stems

Technical data and guidelines for the choice

The maximum static load value shown in the table indicates the static load for a specific load of 0.4 N/mm² to which the damping element can be subjected in order to have optimal vibration absorption.

The table shows also the values (l₂) of elastic deformation with a load of max 0.6 N/mm² in case of a dynamic load.

The effectiveness of the damping depends on the ratio between the disturbance frequency of the machine and the natural frequency of the damping foot.

The natural frequency of the base depends on the material, the geometry, and the specific load [N/mm²] to which it is subjected.

The specific load is obtained by dividing the applied load by the support area of the damping element.

Once the specific load is known, the natural frequency of the foot can be obtained from the graph in figure 1.

The damping starts when the ratio between the disturbance frequency of the machine and the natural frequency of the damping foot is greater than √2. The greater the difference between the interference frequency of the machine and the natural frequency of the foot, the greater the damping (see figure 2).

Example:

Expected load on the foot = 150 N

Specific load LS.VA-32 = 150/239 = 0.63 N/mm²

Specific load LS.VA-40 = 150/452 = 0.33 N/mm²

LS.VA-40 is therefore chosen as the specific load of the example is less than 0.4 N/mm², which is the optimal damping value.

Entering the graph in figure 1 with a specific load of 0.33 N/mm² we obtain a natural frequency of 26 Hz (curve LS.VA-40).

Entering the graph in figure 2, with 26 Hz, the chosen foot will start to dampen frequencies greater than 32 Hz. A damping of 69% is obtained for a machine frequency of 61 Hz. A damping of 92% is obtained for a machine frequency of 85 Hz.