Clufix : Performances

SOFTERFIX™

Produktinformation

Compression Limiters / Performances

SOFTERFIX™ LC type has been designed to adapt to the force engendered by the tension of the bolt whose maximum diameter matches the inside diameter of the limiter - and in the case of SOFTERFIX™ LC type high resistance seriesadapts to even higher force values.

< Compression Force - Clearance Compensation - Recommended Torque >

Compression force

Compression force is characterized by the deflection value, measured on the limiter for a given axial force. The data sheets show a value for the maximum force for which the limiter is designed.

SOFTERFIX Type LC Charge SOFTERFIX Type LC Déflexion

For a different standard axial force value, the following formula is used:
Standard deflection = Maximum deflection x standard force / maximum force

< Compression Force - Clearance Compensation - Recommended Torque >

Clearance compensation assembly

It is possible to use SOFTERFIX™ LC type with bolts whose inside diameter is smaller than the inside diameter of the limiter that would normally match, so as to allow clearance in assembly adjustment.

Oblong versions, which allow uni-directional clearance compensation, are also available.

WARNING: in these cases, the nut or the bolt head must be of a size which will guarantee that it sits on both the limiter and the plastic part.

< Compression Force - Clearance Compensation - Recommended Torque >

Table showing axial force data in accordance with torque applied, friction coefficients and bolt grades.

In making an assembly, a torque (Cs) is applied to the nut & bolt system so that the force (Fo) clamps the assembly together. For a given torque (Cs) applied, the Fo value depends on the system’s friction coefficient (µ).

The table below (extract from the NF E 25-030 standard: (Fastener elements – Bolted assemblies - Design, calculation and mounting conditions) show the maximum recommended torque (depending on the nut and bolt elements assembled).

		Screw or bolt Ø	3	4	5	6	8	10	12	14	16
		Pitch	0.5	0.7	0.8	1	1.25	1.5	1.75	2	2
Grade	µ	Dimension across-flats	5.5	7	8	10	13	16	18	21	21
6.8 Rm = 600 N/mm² Re = 480 N/mm²	0.10	Cs (Nm)	0.71	1.65	3.25	5.6	13.6	27	46	75	115
	0.10	Fo (N)	1724	2988	4885	6896	12647	20128	29339	40280	55356
	0.15	Cs (Nm)	0.91	2.09	4.14	7.1	17.4	34	59	95	148
	0.15	Fo (N)	1556	2696	4414	6226	11432	18206	26550	36463	50216
	0.20	Cs (Nm)	1.06	2.42	4.81	8.3	20	40	69	111	174
	0.20	Fo (N)	1399	2422	3970	5598	10283	16382	23895	32822	45248
8.8 Rm = 800 N/mm² Re = 640 N/mm²	0.10	Cs (Nm)	0.95	2.20	4.34	7.5	18.2	36	62	99	153
	0.10	Fo (N)	2298	3985	6514	9195	16863	26838	39119	53707	73808
	0.15	Cs (Nm)	1.21	2.78	5.5	9.5	23	46	79	127	198
	0.15	Fo (N)	2075	3594	5836	8302	15242	24275	35401	48618	66955
	0.20	Cs (Nm)	1.41	3.22	6.4	11.1	27	53	92	148	232
	0.20	Fo (N)	1866	3230	5293	7464	13710	21843	31860	43763	60331
10.9 Rm = 1000 N/mm² Re = 900 N/mm²	0.10	Cs (Nm)	1.40	3.23	6.3	11	26	52	91	145	225
	0.10	Fo (N)	3376	5853	9568	13506	24768	39418	57457	78882	108406
	0.15	Cs (Nm)	1.79	4.09	8.1	14	34	67	116	187	291
	0.15	Fo (N)	3048	5279	8645	12194	22388	35655	51995	71408	98340
	0.20	Cs (Nm)	2.07	4.74	9.4	16.3	39	78	136	218	341
	0.20	Fo (N)	2740	4744	7774	10962	20137	32082	46795	64277	88611
12.9 Rm = 1200 N/mm² Re = 1080 N/mm²	0.10	Cs (Nm)	1.64	3.78	7.4	12.6	31	61	106	170	263
	0.10	Fo (N)	3951	6849	11196	15805	28984	46128	67236	92309	126858
	0.15	Cs (Nm)	2.09	4.79	9.5	16.4	40	79	136	219	341
	0.15	Fo (N)	3567	6178	10116	14269	26198	41724	60845	83563	115079
	0.20	Cs (Nm)	2.43	5.5	11	19.1	46	92	159	255	399
	0.20	Fo (N)	3207	5552	9098	12828	23565	37542	54760	75218	103964

Rm = tensile strength
Re = elastic strength

Return to top