Tsubaki Products

Shock Guard 　TGH Series

This type can be attached to a high-speed rotating shaft such as a direct motor connection, and is also compatible with high torque.
・The repeated trip accuracy is within ±5%.
・In addition to the basic type, we also stock coupling and pulley types.
・This function does not automatically reset, so after tripping due to overload, the rotation of the drive side is not transmitted to the driven side.
・The return method can be selected from one-position return (returning in only one position) or random return.

Reset method 　(Drag to move. )

・One position reset ：It always returns to a fixed position. Ideal for phase alignment.

・Random Return：It can be restored regardless of the position.

Construction

(1)	Hub	(2)	Drive plate	(3)	Slide plate	(4)	Middle plate	(5)	Backup ring
(6)	Torque adjustment nut	(7)	lock collar	(8)	Drive ball (steel ball A)	(9)	Steel ball B	(10)	Ball bearing
(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)	Hex set screw	(20)	Torque Adjustment Spacer
(21)	Detection plate	(22)	Hex Cap Bolts A	(23)	Adapter	(24)	Hex Cap Bolts	(25)	Spring pin B

Operating principle

During normal operation (engagement)

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.

During overload (trip)

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.

Specification (Standard models )

Series	Set torque range N・m	Repeat working torque precision	Backlash	Reset method
Basic Type	32～5050	±5%	Low	Manual
Coupling type	32～5050
Pulley Type	32～2460

■Basic Type：Customers can directly install gears and sprockets.

■Coupling type ：This type is combined with NER coupling.

■Pulley Type：This type is combined with pulleys.

Catalogs ・Instruction Manuals

Model No. Designation

※Basic Type

TGH

N1000

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Series

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Size
28
40
50
75
100

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Spring Type
L：Weak spring
M：Medium spring
H：Strong spring
U：Super strong spring

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Shock guard side
T

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Shaft bore tolerance
F：F7
G：G7
H：H7
J：JS7
P：P7

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Shaft Bore Diameter
(mm)

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Set screw positioning
D2

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Set torque value
(N・m)

Reset method
No symbol ：Random Return
S：One position reset

Keyway tolerance
J：New JIS 　Js9
P：New JIS 　P9
F：Old JIS 　F7
E：Old JIS 　E9

Type
B：Basic Type

※Coupling type

TGH

N200

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Series

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Size
28
40
50
75
100

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Spring Type
L：Weak spring
M：Medium spring
H：Strong spring
U：Super strong spring

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Shaft bore tolerance
F：F7
G：G7
H：H7
J：JS7
P：P7

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Shaft Bore Diameter
(mm)

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Set screw positioning
D2

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Shaft bore tolerance
F：F7
G：G7
H：H7
J：JS7
P：P7

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Shaft Bore Diameter
(mm)

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Set screw positioning
D0～D8

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Set torque value
(N・m)

Keyway tolerance
J：New JIS 　Js9
P：New JIS 　P9
F：Old JIS 　F7
E：Old JIS 　E9

Type
CN：Coupling (NER) type

Shock guard side
T

Coupling side
C

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Reset method
No symbol ：Random Return
S：One position reset

※Pulley Type

TGH

100

N1500

-TK

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Series

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Size
28
40
50
75

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Spring Type
L：Weak spring
M：Medium spring
H：Strong spring
U：Super strong spring

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｜
｜
｜
｜
｜
｜
｜

｜
｜
｜
｜

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Shock guard side
T

｜
Shaft bore tolerance
F：F7
G：G7
H：H7
J：JS7
P：P7

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Shaft Bore Diameter
(mm)

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｜
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｜

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Set screw positioning
D0

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Set torque value
(N・m)

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Special

Reset method
No symbol ：Random Return
S：One position reset

Keyway tolerance
J：New JIS 　Js9
P：New JIS 　P9
F：Old JIS 　F7
E：Old JIS 　E9

Type
P：Pulley Type

List of Model Numbers

※Click the model No. for detailed information.

Size	Spring Type	Torque N・m		Basic Type			Coupling type					Pulley Type
		Torque N・m		Range of Shaft Bore Diameters mm		Model	Bore Diameter Range on Shock guard side mm		Bore Diameter Range on Coupling Side mm		Model	Range of Shaft Bore Diameters mm		Model
		Minimum	Maximum	Minimum	Maximum	Model	Minimum	Maximum	Minimum	Maximum	Model	Minimum	Maximum	Model
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

※The dimensions in ( ) is the maximum shaft hole diameter based on former JIS processing. The new JIS standard is based on "JIS B 1301-1996," while the old JIS standard is based on "JIS B 1301-1959."

Options

TG Sensor

The TG Sensor is a Shock Guard specific proximity switch system overload detecting sensor. After detecting Shock Guard overload (movement of plate in the axis direction), the motor can be stopped and the alarm can be signaled.

		AC Type	DC Type
Model No.		TGS8	TGS8DN
Supply voltage	Rating	AC24～240V	-
Supply voltage	Range to be used	AC20～264V(50/60Hz)	DC10～30V
Power consumption		Under 1.7mA (at AC200V)	Under 16mA
Control output (opening and closing capacity)		5～100mA	Max. 200mA
Indicator lamp		Operation indicator
Ambient operating temperature		-25～+70℃(Does not freeze. )
Ambient operating humidity		35～95% RH
Output mode		-	NPN
Operation mode		NC (When not detecting the sensor plate, output opening and closing state is displayed. )
Insulation resistance		More than 50MΩ (at DC500V megger) In between the energized part and the case
Mass		about 45g (code length 2m)	about 56g (code length 2m)
Residual voltage		>> Refer to characteristic data	Less than 2.0V (load current 200mA/code length 2m)
Instruction Manuals		TG Sensor TGS8	TG Sensor TGS8DN