SUNTES TX15D, TX20D, TX30D, TX40D and TX50D Automatic-Reset Torque Releasers

SUNTES TX15D, TX20D, TX30D, TX40D and TX50D Automatic-Reset Torque Releasers

SUNTES TX15D, TX20D, TX30D, TX40D and TX50D Automatic-Reset Torque Releasers. These units interrupt power transmission when the torque in the drive system exceeds the selected setting. Choosing the correct size, spring variant and mechanical interface helps limit the effects of sudden overloads on the connected machinery. The full model suffix identifies the setting configuration and must be retained in an order.

Configuration and installation interface

The D configuration uses a flange interface. The dimensional table specifies the mounting bolt pitch-circle diameter and bolt size separately, in addition to the locating diameters and their tolerances. Compatible roller-chain sprockets require the matching D-type machining dimensions.

Automatic-reset operating sequence

During normal operation, spring force holds the steel balls in the hub-boss pockets and torque passes through the balls to the flange. When an overload drives the balls out along the pocket ramps, torque transmission is interrupted. The action ring moves axially toward the adjust ring; that displacement can be detected by a limit switch or proximity switch. After the cause of overload has been removed, rotation of either the input or output brings the balls back to the prescribed pocket position, once per revolution, where the springs automatically reset the mechanism.

Torque setting and characteristic curves

The L, H and G variants have distinct torque-setting ranges and spring combinations. The specification table gives spring color and quantity, maximum speed, moment of inertia and product mass. Torque can be varied in proportion to the number of springs, with a stated minimum of three springs. Use the characteristic curve for the appropriate size when reviewing a setting. Changing spring count requires the correct configuration and adjustment procedure; the top of a torque range is not a universal recommended operating setting.

Selection and ordering

Specify the exact type, size, L/H/G variant, required release torque, actual shaft speed and shaft-bore arrangement. Include normal running torque, startup conditions, the driven-machine duty and the mounting details. Check overload-detection travel and allow access for adjustment and reset. Where a value spans several rows, it applies to the associated grouped variants. Fit tolerances, pilot bores and screw callouts are retained in the data below. Confirm the current drawing and application suitability before machining mating components.

Dimensions and specifications

Use the lettered dimensions with the corresponding drawing. Torque is stated in N·m, speed in min⁻¹, and mass in kg where indicated. Fit tolerances, drawing symbols, grouped rows and blank entries are retained. A blank entry is not zero.

Dimensions

Model	A	B	C	D	E	φF	φG	φH	φJ	Mounting bolts
										K P.C.D.	L bolt size
TX15D-L・H・G	47	10	6.0	4	13.7	69	50 +0 -0.025	56	96	60	6-M5
TX20D-L・H・G	53	11	8.3	4	15.1	88	65 +0 -0.030	68	108	75	6-M6
TX30D-L・H・G	65	13	10.5	6	20.0	113	85 +0 -0.035	84	124	100	6-M6
TX40D-L・H・G	75	15	13.2	6	20.3	134	105 +0 -0.035	108	148	120	6-M8
TX50D-L・H・G	90	20	15.8	8	24.8	168	130 +0 -0.040	134	174	150	6-M10

Performance specifications

Model	Torque setting range (N·m)	Spring color × quantity	Maximum speed (min⁻¹)	Moment of inertia (kg·m²)	Product mass (kg)
TX15D-L	7～24	White × 10	900	0.58×10-3	1.0
TX15D-H	8～38	Red × 5
TX15D-G	13～50	Red × 10
TX20D-L	12～43	White × 12	750	1.3×10-3	1.5
TX20D-H	16～70	Red × 6
TX20D-G	40～100	Red × 12
TX30D-L	14～72	White × 12	600	3.7×10-3	3.0
TX30D-H	33～170	Red × 6
TX30D-G	72～200	Red × 12
TX40D-L	20～160	White × 12	450	9.6×10-3	5.0
TX40D-H	43～330	Red × 6
TX40D-G	97～400	Red × 12
TX50D-L	79～390	White × 12	400	26.4×10-3	10.0
TX50D-H	130～580	Red × 6
TX50D-G	280～800	Red × 12

Torque-releaser shaft interface

Model	Maximum shaft bore (φmm)	Standard shaft bore (φmm)	Pilot bore (φmm)	Set screws	Axial travel on overload (mm)
TX15D-L・H・G	15	15H7×5Js	9	2-M4	1.5
TX20D-L・H・G	20	20H7×6Js9	12	2-M4	1.9
TX30D-L・H・G	30	30H7×8Js9	19	2-M4	2.6
TX40D-L・H・G	40	40H7×12Js9	24	2-M5	2.9
TX50D-L・H・G	50	50H7×14Js9	34	2-M8	3.8

Construction and component reference numbers

Dimensional drawing

TX15 torque-setting characteristic curve

TX20 torque-setting characteristic curve

TX30 torque-setting characteristic curve

TX40 torque-setting characteristic curve

TX50 torque-setting characteristic curve

Confirm the latest dimensional drawing and specifications for the selected configuration before manufacture or installation.