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TSUBAKI: Shock Guard ​TGH Series

Shock Guard ^​TGH Series

In modern industrial systems, protecting machinery from overload damage is critical. The Tsubaki TGH Shock Guard Series is a high-performance mechanical torque limiter designed to instantly disconnect power transmission when overload occurs--preventing costly downtime and equipment failure.

Engineered for high-speed and high-torque applications, the TGH series delivers reliable, repeatable protection across a wide range of industries including manufacturing, conveyors, packaging, and heavy machinery.

STRUCTURE

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(1)	Hub	(2)	Drive plate	(3)	Slide plate	(4)	Intermediate plate	(5)	Backup ring
(6)	Torque adjustment nut	(7)	lock collar	(8)	Drive ball (steel ball A)	(9)	steel ball B	(10)	ball bearings
(11)	Thrust bearing	(12)	Thrust washer A	(13)	Thrust washer B	(14)	Support Ring	(15)	Snap ring A
(16)	Spring pin A	(17)	Coil spring	(18)	Snap ring B	(19)	Hexagon socket set screw	(20)	Torque Adjustment Spacer
(21)	Detection plate	(22)	Hexagon socket head bolt A	(23)	adapter	(24)	Hexagon socket head bolt	(25)	Spring pin B

Operating principle

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Normal (engaged)

In the TGH series, several drive balls (steel balls A) are sandwiched between a drive plate and a slide plate, and power is transmitted while being pressurized by a spring.

Power enters through the hub, is transmitted to the slide plate which meshes with the involute spline, and is then transmitted to the drive plate via the drive balls (steel balls A).

The driven pulley and coupling are fixed to the adapter attached to the drive plate with spring pins and bolts.

When overloaded (tripped)

When an overload occurs, the drive balls (steel balls A) push the slide plate toward the spring, and while rotating, they jump out of each pocket on the drive plate, cutting off power.

After this, if the drive ball (steel ball A) continues to spin freely, it will enter a deep pocket in the slide plate, and steel ball B on the intermediate plate will support the spring load applied to the slide plate.

As a result, the drive ball (steel ball A) remains stuck in a deep pocket in the slide plate, and even if it continues to spin freely, it does not transmit power to the drive plate and continues to spin freely.

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Specifications (standard model)

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Series	Set torque range N・m	Repeated operating torque accuracy	Backlash	Reset method
Basic Type	32～5050	±5%	Small	manual
Coupling Type	32～5050
Pulley Type	32～2460

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Product model number list

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Size	Spring Type	torque N・m		Basic Type			Coupling Type					Pulley Type
				Shaft hole diameter range mm		Model	Shock Guard side Shaft hole diameter range mm		Coupling side Shaft hole diameter range mm		Model	Shaft hole diameter range mm		Model
		Minimum	Maximum	Minimum	Maximum		Minimum	Maximum	Minimum	Maximum		Minimum	Maximum
28	L	32	80	12	28	TGH28-LB	12	28	25	65 (61)	TGH28-LCN	12	36 (35)	TGH28-LP
	M	64	160			TGH28-MB					TGH28-MCN			TGH28-MP
	H	96	240			TGH28-HB					TGH28-HCN			TGH28-HP
	U	128	320			TGH28-UB					TGH28-UCN			TGH28-UP
40	L	60	150	17	40	TGH40-LB	17	40	25	85 (80)	TGH40-LCN	17	50	TGH40-LP
	M	120	300			TGH40-MB					TGH40-MCN			TGH40-MP
	H	180	450			TGH40-HB					TGH40-HCN			TGH40-HP
	U	280	700			TGH40-UB					TGH40-UCN			TGH40-UP
50	L	80	200	20	50	TGH50-LB	20	50	50	90 (84)	TGH50-LCN	20	58 (56)	TGH50-LP
	M	160	400			TGH50-MB					TGH50-MCN			TGH50-MP
	H	320	800			TGH50-HB					TGH50-HCN			TGH50-HP
	U	480	1200			TGH50-UB					TGH50-UCN			TGH50-UP
75	L	246	615	50	75 (72)	TGH75-LB	50	75 (72)	60	105 (99)	TGH75-LCN	50	80 (79)	TGH75-LP
	M	492	1230			TGH75-MB					TGH75-MCN			TGH75-MP
	H	738	1845			TGH75-HB					TGH75-HCN			TGH75-HP
	U	984	2460			TGH75-UB					TGH75-UCN			TGH75-UP
100	L	400	1000	60	100 (95)	TGH100-LB	60	100 (95)	80	125 (119)	TGH100-LCN	-
	M	800	2000			TGH100-MB					TGH100-MCN
	H	1600	4000			TGH100-HB					TGH100-HCN
	U	2020	5050			TGH100-UB					TGH100-UCN

TG sensor

This is a proximity switch type overload detection sensor designed specifically for Shock Guard. It can detect an overload on Shock Guard (movement of the plate in the axial direction) and stop the motor or issue an alarm.

		AC type	DC type
Model number		TGS8	TGS8DN
power supply Voltage	Rating	AC24～240V	-
	Usable range	AC20～264V(50/60Hz)	DC10～30V
Current consumption		1.7mA or less (at AC200V)	16mA or less
Control output (switching capacity)		5～100mA	Max 200mA
indicator light		Operation display
Ambient temperature		-25 to +70°C (but do not freeze)
Ambient humidity		35～95% RH
Output format		-	NPN
Operation form		NC (センサプレートを検知していない時の出力開閉状態を表します)
Insulation resistance		50MΩ or more (DC500V megger) between all live parts and case
mass		Approximately 45g (2m cord length)	Approximately 56g (2m cord length)
Residual voltage		>> See characteristic data	2.0V or less (load current 200mA, cord length 2m)
Instruction Manuals		TG sensor TGS8	TG sensor TGS8DN

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Dimensions

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AC type TGS8 DC type TGS8DN

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