Locking Assemblies Stainless Steel RfN 7012 | RINGFEDER®

Locking Assemblies RfN 7012 Stainless Steel

Identical in design and function to the traditional 7012 device, this unit is made of stainless steel for applications requiring rust free installation. Torque capacity is somewhat reduced due to the nature of stainless steel.

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Technical Data & CAD Models

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d mm	D mm	L mm	L₁ mm	L₃ mm	T Nm	p_W N/mm²	p_N N/mm²	T_A Nm	D_{N min} bei Rp_0,2400 N/mm² mm	T_max Nm
19	47	27,5	20	17	252	218	88	14	55	269
20	47	27,5	20	17	265	206	88	14	55	320
22	47	27,5	20	17	289	187	88	14	55	350
24	50	27,5	20	17	353	191	92	14	58	428
25	50	27,5	20	17	367	183	92	14	61	445
28	55	27,5	20	17	408	162	83	14	63	495
30	55	27,5	20	17	435	151	83	14	63	528
32	60	27,5	20	17	617	188	100	14	71	748
35	60	27,5	20	17	671	171	100	14	71	815
38	65	27,5	20	17	906	196	114	14	78	1100
40	65	27,5	20	17	950	185	114	14	78	1153
42	75	33,5	24	20	1509	227	127	35	92	1767
45	75	33,5	24	20	1610	211	127	35	92	1885
48	80	33,5	24	20	1710	197	118	35	97	2003
50	80	33,5	24	20	1777	189	118	35	97	2081
55	85	33,5	24	20	2267	199	129	35	104	2655
60	90	33,5	24	20	2460	181	121	35	109	2880
65	95	33,5	24	20	3030	190	130	35	117	3550
70	110	39,5	28	24	4581	207	132	70	135	5431
75	115	39,5	28	24	4887	192	125	70	140	5795
80	120	39,5	28	24	5192	179	120	70	145	6155
85	125	39,5	28	24	6281	192	131	70	153	7446
90	130	39,5	28	24	6627	181	125	70	158	7856
95	135	39,5	28	24	7843	192	135	70	167	7856
100	145	47	33	26	9591	196	135	125	179	11125
110	155	47	33	26	10488	177	126	125	189	12165
120	165	47	33	26	13004	184	134	125	203	16947
130	180	52	38	34	17522	162	117	125	216	20325
140	190	52	38	34	20661	164	121	125	229	23966
150	200	52	38	34	24046	167	125	125	243	27892

d inch	D inch	L inch	L₁ inch	L₃ inch	T ft-lbs	p_W psi	p_N psi	T_A ft-lbs	D_{N min} bei Rp_0,2400 N/mm² inch	T_max ft-lbs
0.748	1.850	1.083	0.787	0.669	186	31594	12754	10	2.165	198
0.787	1.850	1.083	0.787	0.669	195	29855	12754	10	2.165	236
0.866	1.850	1.083	0.787	0.669	213	27101	12754	10	2.165	258
0.945	1.969	1.083	0.787	0.669	260	27681	13333	10	2.283	316
0.984	1.969	1.083	0.787	0.669	271	26522	13333	10	2.402	328
1.102	2.165	1.083	0.787	0.669	301	23478	12029	10	2.480	365
1.181	2.165	1.083	0.787	0.669	321	21884	12029	10	2.480	389
1.260	2.362	1.083	0.787	0.669	455	27246	14493	10	2.795	552
1.378	2.362	1.083	0.787	0.669	495	24783	14493	10	2.795	601
1.496	2.559	1.083	0.787	0.669	668	28406	16522	10	3.071	811
1.575	2.559	1.083	0.787	0.669	701	26812	16522	10	3.071	850
1.654	2.953	1.319	0.945	0.787	1113	32899	18406	26	3.622	1303
1.772	2.953	1.319	0.945	0.787	1187	30580	18406	26	3.622	1390
1.890	3.150	1.319	0.945	0.787	1261	28551	17101	26	3.819	1477
1.969	3.150	1.319	0.945	0.787	1311	27391	17101	26	3.819	1535
2.165	3.346	1.319	0.945	0.787	1672	28841	18696	26	4.094	1958
2.362	3.543	1.319	0.945	0.787	1814	26232	17536	26	4.291	2124
2.559	3.740	1.319	0.945	0.787	2235	27536	18841	26	4.606	2618
2.756	4.331	1.555	1.102	0.945	3379	30000	19130	52	5.315	4006
2.953	4.528	1.555	1.102	0.945	3605	27826	18116	52	5.512	4274
3.150	4.724	1.555	1.102	0.945	3829	25942	17391	52	5.709	4540
3.346	4.921	1.555	1.102	0.945	4633	27826	18986	52	6.024	5492
3.543	5.118	1.555	1.102	0.945	4888	26232	18116	52	6.220	5794
3.740	5.315	1.555	1.102	0.945	5785	27826	19565	52	6.575	5794
3.937	5.709	1.850	1.299	1.024	7074	28406	19565	92	7.047	8205
4.331	6.102	1.850	1.299	1.024	7736	25652	18261	92	7.441	8973
4.724	6.496	1.850	1.299	1.024	9591	26667	19420	92	7.992	12500
5.118	7.087	2.047	1.496	1.339	12924	23478	16957	92	8.504	14991
5.512	7.480	2.047	1.496	1.339	15239	23768	17536	92	9.016	17677
5.906	7.874	2.047	1.496	1.339	17736	24203	18116	92	9.567	20572

Images & Drawings

Dimensions

Location

Belt pulley

Product Characteristics

Slimmest design - especially suitable for applications where space is limited. The Locking Assembly RfN 7012 stainless compensates small tolerance deviations and compensates small mounting errors.
Large transmittable forces and moments – several Locking Assemblies RfN 7012 stainless can be placed one behind the other. The transmissible torque and axial forces are added - please take in this respect consulting with our technical experts.
Easy installation – in comparison to crosspress fits temperature treatments and fitting are eliminated. Locking Assemblies RfN 7012 stainless steel can cover a big fitting clearance.
Low risk to contamination – during the tightening process the functional surfaces of the device and connection are pressed together generating a surface pressure that does not allow the ingress of contamination.
Adjustable transmission values – the locking screw torque can be changed giving a corresponding change in transmission values. RfN 7012 stainless Locking Assemblies can be tightened and released repeatedly.

Example applications

chain wheels
levers
pulleys
slip-on gear mechanisms
belt drums
running wheels
cable sheaves

Mounting of Locking Assembly

The Locking Assemblies are supplied slightly oiled and ready-to-use. The values for T, F_ax, p_W and p_N apply to Locking Assemblies in delivery condition.

Tolerances

We recommend the following mounting tolerances

Shaft: k9-h9; Hub: N9-H9
Max. admissible Shaft: k11-h11; Hub: N11-H11

To avoid excessive deformations of the relatively thickwalled thrust rings, the Locking Assembly should be located as symmetrically as possible between shaft and hub bore. If the shaft is smaller than nominal d, the bore should exceed nominal D to the same extent and vice versa. The concentricity quality is determined by the direct centering between shaft and hub.

Arrangement of several Locking Assemblies RfN 7012 stainless

If several Locking Assemblies are to be installed the transmission values of the table can be added when the Locking Assemblies are located within a distance of 4·L.

Change of screw tightening torques

The Locking Assemblies are generally equipped with A2-70 grade screws. A reduction of the screw tightening torque is possible. (Please contact our specialists for assistance).