TAS Schäfer 8006 Locking Assemblies — Models, Torque Ratings and Installation Data

The 8006 consists of inner and outer conical rings rather than a complete assembly with its own integral clamping screws. An external flange supplies the axial clamping force. Standard and slotted ordering forms are available.

TAS Schäfer 8006 locking assembly — series schematic

Operating principle and connection design

Conical contact surfaces convert an axial clamping action into radial pressure. The inner contact grips the shaft while the outer contact expands against the hub bore. Torque is transmitted through friction over the contact surfaces, producing a backlash-free connection without requiring a keyway for torque transmission. The assembly is placed internally between the shaft and the hub; both mating components therefore form part of the load-carrying system.

Series characteristics and mating surfaces

Characteristic	Series detail
Assembly positioning	Axial displacement
Self-centering	Good
Self-locking	None
Shaft tolerance / surface	h6 for d < 38 mm; h8 for d > 40 mm; Rz10
Hub tolerance / surface	H7 for d < 38 mm; H8 for d > 40 mm; Rz10
Bending-moment share	Depends on hub design and number of clamping elements

Axial movement in this table describes behavior during installation. Self-centering describes the assembly’s locating action; it does not eliminate the need to check the shaft and hub geometry, runout requirements and bearing arrangement. Self-locking describes the cone behavior and determines the release procedure, rather than the operating torque rating.

Size and capacity table

The table covers 71 catalog size rows, from d = 6 mm to d = 500 mm. Select by the complete d/D combination. Dimensions and ratings are specific to each row; larger nominal diameters do not necessarily mean every rating increases. Decimal points are used throughout.

Ordering designation	d — shaft (mm)	D — hub bore (mm)	L (mm)	l (mm)	At — shaft contact area (mm²)	Fo — pretension, unslotted (N)	FA — clamping force (N)	T — torque at p=100 N/mm² (Nm)	Fax — axial force at p=100 N/mm² (N)	x — 1 element (mm)	x — 2 elements (mm)	x — 3 elements (mm)	x — 4 elements (mm)	Weight (kg)	d1 — spacer bore (mm)	D1 — spacer outside (mm)
TAS 8006/6/9	6	9	4.5	3.7	69	—	3240	2.16	720	2	2	3	3	0.00118	6.1	8.9
TAS 8006/7/10	7	10	4.5	3.7	80	—	3780	2.94	840	2	2	3	3	0.00136	7.1	9.9
TAS 8006/8/11	8	11	4.5	3.7	90	—	4300	3.84	960	2	2	3	3	0.00151	8.1	10.9
TAS 8006/9/12	9	12	4.5	3.7	105	7600	5700	5.7	1270	2	2	3	3	0.00166	9.1	11.9
TAS 8006/10/13	10	13	4.5	3.7	116	6950	6300	7	1400	2	2	3	3	0.00182	10.1	12.9
TAS 8006/12/15	12	15	4.5	3.7	139	6950	7500	10	1670	2	2	3	3	0.00214	12.1	14.9
TAS 8006/13/16	13	16	4.5	3.7	151	6450	8150	11.8	1810	2	2	3	3	0.00226	13.1	15.9
TAS 8006/14/18	14	18	6.3	5.3	233	11200	12600	19.6	2800	3	3	4	5	0.00487	14.1	17.9
TAS 8006/15/19	15	19	6.3	5.3	250	10750	13500	22.5	3000	3	3	4	5	0.00526	15.1	18.9
TAS 8006/16/20	16	20	6.3	5.3	266	10100	14400	25.5	3190	3	3	4	5	0.00545	16.1	19.9
TAS 8006/17/21	17	21	6.3	5.3	283	9550	15300	28.9	3400	3	3	4	5	0.0058	17.1	20.9
TAS 8006/18/22	18	22	6.3	5.3	300	9100	16200	32.4	3600	3	3	4	5	0.00612	18.1	21.9
TAS 8006/19/24	19	24	6.3	5.3	316	12600	17100	36	3790	3	3	4	5	0.00782	19.2	23.8
TAS 8006/20/25	20	25	6.3	5.3	333	12050	18000	40	4000	3	3	4	5	0.00817	20.2	24.8
TAS 8006/22/26	22	26	6.3	5.3	366	9050	19800	48	4400	3	3	4	5	0.00724	22.2	25.8
TAS 8006/24/28	24	28	6.3	5.3	400	8350	21600	58	4800	3	3	4	5	0.00792	24.2	27.8
TAS 8006/25/30	25	30	6.3	5.3	416	9900	22500	62	5000	3	3	4	5	0.0101	25.2	29.8
TAS 8006/28/32	28	32	6.3	5.3	466	7400	25200	78	5600	3	3	4	5	0.00918	28.2	31.8
TAS 8006/30/35	30	35	6.3	5.3	499	8500	27000	90	6000	3	3	4	5	0.012	30.2	34.8
TAS 8006/32/36	32	36	6.3	5.3	533	7850	28800	102	6400	3	3	4	5	0.01	32.2	35.8
TAS 8006/35/40	35	40	7	6	659	10100	35600	138	7900	3	3	4	5	0.017	35.2	39.8
TAS 8006/36/42	36	42	7	6	678	11600	36600	147	8200	3	3	4	5	0.02	36.2	41.8
TAS 8006/38/44	38	44	7	6	716	11000	38700	163	8600	3	3	4	5	0.021	38.2	43.8
TAS 8006/40/45	40	45	8	6.6	829	13800	45000	199	9950	3	4	5	6	0.023	40.2	44.8
TAS 8006/42/48	42	48	8	6.6	870	15600	47000	219	10400	3	4	5	6	0.028	42.2	47.8
TAS 8006/45/52	45	52	10	8.6	1215	28200	66000	328	14600	3	4	5	6	0.042	45.2	51.8
TAS 8006/48/55	48	55	10	8.6	1296	24600	70000	373	15600	3	4	5	6	0.045	48.2	54.8
TAS 8006/50/57	50	57	10	8.6	1350	23500	73000	405	16200	3	4	5	6	0.047	50.2	56.8
TAS 8006/55/62	55	62	10	8.6	1485	21800	80000	490	17800	3	4	5	6	0.05	55.2	61.8
TAS 8006/56/64	56	64	12	10.4	1829	29400	99000	615	22000	3	4	5	7	0.067	56.2	63.8
TAS 8006/60/68	60	68	12	10.4	1959	27400	106000	705	23500	3	4	5	7	0.072	60.2	67.8
TAS 8006/63/71	63	71	12	10.4	2057	26300	111000	780	24800	3	4	5	7	0.077	63.2	70.8
TAS 8006/65/73	65	73	12	10.4	2123	25400	115000	830	25600	3	4	5	7	0.079	65.2	72.8
TAS 8006/70/79	70	79	14	12.2	2682	31000	145000	1120	32000	3	5	6	7	0.111	70.3	78.7
TAS 8006/71/80	71	80	14	12.2	2720	31000	147000	1160	32600	3	5	6	7	0.113	71.3	79.7
TAS 8006/75/84	75	84	14	12.2	2873	34600	155000	1290	34400	3	5	6	7	0.12	75.3	83.7
TAS 8006/80/91	80	91	17	15	3768	48000	203000	1810	45000	4	5	6	8	0.188	80.3	90.7
TAS 8006/85/96	85	96	17	15	4004	45600	216000	2040	48000	4	5	6	8	0.2	85.3	95.7
TAS 8006/90/101	90	101	17	15	4239	43400	229000	2290	51000	4	5	6	8	0.216	90.3	100.7
TAS 8006/95/106	95	106	17	15	4475	41200	242000	2550	54000	4	5	6	8	0.224	95.3	105.7
TAS 8006/100/114	100	114	21	18.7	5872	60700	317000	3520	70000	4	6	7	9	0.38	100.3	113.7
TAS 8006/110/124	110	124	21	18.7	6459	66000	349000	4250	77000	4	6	7	9	0.41	110.3	123.7
TAS 8006/120/134	120	134	21	18.7	7046	60200	380000	5050	84000	4	6	7	9	0.452	120.3	133.7
TAS 8006/130/148	130	148	28	25.3	10328	96200	558000	8050	124000	5	7	9	11	0.847	130.3	147.6
TAS 8006/140/158	140	158	28	25.3	11122	89000	600000	9350	134000	5	7	9	11	0.91	140.3	157.6
TAS 8006/150/168	150	168	28	25.3	11916	84500	643000	10700	143000	5	7	9	11	0.967	150.4	167.6
TAS 8006/160/178	160	178	28	25.3	12711	78500	686000	12200	152500	5	7	9	11	1.023	160.4	177.6
TAS 8006/170/191	170	191	33	30	16014	117500	865000	16300	192000	6	8	10	12	1.5	170.4	190.5
TAS 8006/180/201	180	201	33	30	16956	111200	916000	18300	204000	6	8	10	12	1.58	180.5	200.5
TAS 8006/190/211	190	211	33	30	17898	105000	966000	20400	214000	6	8	10	12	1.68	190.5	210.5
TAS 8006/200/224	200	224	38	34.8	21854	134000	1180000	26200	262000	6	8	11	13	2.32	200.6	223.4
TAS 8006/210/234	210	234	38	34.8	22947	127000	1239000	28900	275000	6	8	11	13	2.45	210.6	233.4
TAS 8006/220/244	220	244	38	34.8	24040	122000	1298000	31700	288000	6	8	11	13	2.49	220.6	243.4
TAS 8006/230/257	230	257	43	39.5	28527	165000	1540000	39400	342000	6	9	12	14	3.38	230.6	256.4
TAS 8006/240/267	240	267	43	39.5	29767	157500	1610000	43000	358000	6	9	12	14	3.52	240.6	266.4
TAS 8006/250/280	250	280	48	44	34700	190000	1870000	52000	415000	7	10	13	16	4.68	250.8	279.2
TAS 8006/260/290	260	290	48	44	36100	182000	1950000	56500	435000	7	10	13	16	4.82	260.8	289.2
TAS 8006/270/300	270	300	48	44	37500	177000	2030000	61000	450000	7	10	13	16	4.94	270.8	299.2
TAS 8006/280/313	280	313	53	49	43100	206000	2330000	72500	520000	7	10	14	17	6.27	280.8	312.2
TAS 8006/290/323	290	323	53	49	44600	222000	2410000	77500	535000	7	11	14	17	6.5	290.8	332.2
TAS 8006/300/333	300	333	53	49	46200	214000	2490000	83000	555000	7	11	14	17	6.74	300.8	322.2
TAS 8006/320/360	320	360	65	59	59300	292000	3200000	114000	710000	10	15	20	25	10.9	321	359
TAS 8006/340/380	340	380	65	59	63000	272000	3400000	128500	755000	10	15	20	25	11.5	341	379
TAS 8006/360/400	360	400	65	59	66700	258000	3600000	144000	800000	10	15	20	25	12.2	361	399
TAS 8006/380/420	380	420	65	59	70400	269000	3800000	160500	845000	10	15	20	25	12.8	381	419
TAS 8006/400/440	400	440	65	59	74200	256000	4000000	178000	890000	10	15	20	25	13.5	401	439
TAS 8006/420/460	420	460	65	59	77800	244000	4200000	196000	935000	10	15	20	25	14.1	421	459
TAS 8006/440/480	440	480	65	59	81500	234000	4400000	215000	980000	10	15	20	25	14.7	441	479
TAS 8006/460/500	460	500	65	59	85300	224000	4600000	235000	1020000	10	15	20	25	15.4	461	499
TAS 8006/480/520	480	520	65	59	89000	239000	4800000	256000	1070000	10	15	20	25	16	481	519
TAS 8006/500/540	500	540	65	59	92700	229000	5000000	278000	1110000	10	15	20	25	16.6	501	539

Reading the force and spacing data

FA is the axial clamping force needed to produce the stated reference pressure p = 100 N/mm². T is the transmitted torque at that pressure with no axial working load; Fax is the transmitted axial force in N with zero working torque. Fo is the pretension needed to take up tolerances for the unslotted version. A dash is retained where no Fo value is listed. These columns must not be confused with screw tightening torque: the external flange and its screws require their own design calculation.

External flange, multiple elements and ordering

L is the complete element length and l is the width of the inner and outer rings. The four x columns give the flange-to-hub spacing for one, two, three or four elements. The spacer-bushing dimensions d1 and D1 belong to this installation arrangement. When several elements are used, arrange them so that they do not mutually inhibit their clamping action; do not assume capacity scales directly with the number of rings. The basic designation is TAS 8006/d/D; specify the suffix slotted when that version is required. Confirm the tolerance choice for the intermediate 38–40 mm range before machining, because the tolerance note does not define that interval explicitly.

Load selection and hub strength

Determine the peak operating torque, reversals, starting events, axial loads, radial loads and any bending moment before selecting a size. The bending share listed for this series is an application limit requiring a combined-load check, not an additional independent load allowance. Shaft and hub material strength, hub outside diameter, hollow-shaft wall thickness and local geometry must support the listed contact pressure. Radial force and bending can increase pressure on one side of the contact and reduce it on the other. The pressure and stiffness assessment therefore remains necessary even when the nominal torque is within the table value.

Installation and removal

Provide the external clamping flange, spacer and fasteners as a coordinated installation. Verify that the applied axial force, element arrangement and available travel produce the intended radial pressure. Clean the mating shaft and hub surfaces and retain the specified oil film. The force values in the table are design inputs for the external clamping system; they are not instructions to tighten an unspecified screw to a numerical torque.

Application and ordering information

Typical internal-clamping applications include gears, sprockets, pulleys and conveyor drums. Match the required torque and positioning behavior to the actual machine duty rather than choosing by diameter alone. State the series, shaft diameter d, hub bore D, load case, shaft and hub materials, available installation space and environmental conditions when ordering. Stainless versions are offered within the wider product group, but their material, size availability and ratings must be confirmed for the requested version. Do not apply standard-version capacity values automatically to a different material or special design.