Shock Guard  TGF Series

Product photo
  • Excellent reset position precision.
  • ・Pre-loading the support bearing of the drive plate eliminates gaps, and the attachment faces are ground for better output attachment face precision.
    If more runout accuracy is required, it is possible to polish the mounting surface based on the holes after assembly to eliminate slight runout errors due to assembly.
  • ・Ideal for indexers thanks to its minimal backlash and excellent reset position accuracy.
  • ・Thanks to automatic re-engagement, you only have to turn the drive side after removing the causes of overload.
  • ・The balls and pockets, which transfer the torque, are engaged only in one position because of the unique structure.

Construction

TGF20~45

TGF20~45 Construction

(1) Hub  (2) End nut  (3) Hex set screw  (4) Drive plate  (5) Slide plate  (6) Adjustment nut

(7) Coil spring  (8) Drive ball (Ball A)  (9) Snap ring  (10) Hex set screw  (11) Ball B  (12) Ball C

(13) Housing  (14) Thrust bearing  (15) Hex set screw

TGF65~90

TGF65~90 Construction

(1) Hub  (2) End nut  (3) Hex set screw  (4) Drive plate  (5) Slide plate  (6) Adjustment nut

(7) Spring bolt  (8) Hexagonal countersunk screw  (9) Coil spring  (10) Drive ball (Ball A)  (11) Bush

(12) Snap ring  (13) Hex set screw  (14) RADIAL BEARING  (15) Thrust bearing A

(16) Thrust bearing A  (17) Housing  (18) Thrust bearing B

Operating principle

Animation showing the operating principle of the TGF Series.

During normal operation (engagement)

The TGF Series operates by transmitting torque from the hub to the drive plate on the output side through the drive ball. (Or the reverse.)

Bolt a sprocket or belt sprocket directly to the drive plate.

The hub flange has several holes to hold the drive balls. There is a pocket for drive balls in the drive plate on the output side. The drive balls transmit power under pressure from the coil spring on the thrust race.

Operating principle

During overload (trip)

If an overload occurs, the drive balls push the thrust race toward the coil springs and come out of the pockets of the drive plate while rotating to release the driving force.

The cover on the coil spring side moves at this time. The TG sensor detects the amount of movement, and after the overload it can easily and automatically stop the drive power.

Reset method

If you restart the operation after the occurrence of an overload, the drive balls automatically return to their positions within one revolution.

The TGF Series will continue to rotate after activating and continuously reset, so after an overload and when the TG sensor detects the overload, be sure to immediately stop the drive power.

Package (Standard models )

Set torque range N・m Repeat working torque precision Backlash Reset method
6.0~4900 ±5% Minimal Automatic

■Type 2 :Enables direct mounting of belt sprockets. The shaft-securing setscrew can be tightened from the outside.

■Type 3 :Thinner than Type 2 and ideal for Power-Lock mounting. (Refer to the link for details.)

■Type 5 :The Echt-Flex Coupling provides an angular tolerance.

■Type 7 :The Echt-Flex Coupling provides angular and parallelism tolerances.

Catalogs ・Instruction Manuals

Model No. Designation

※No-coupling type

TGF 20 - L 2 - TH20JD2 - N19

Series

Size




Type
2:Type 2
3:Type 3

Shaft bore code

Set torque value
N・m
Spring strength
L:Weak spring
M:Medium spring
H:Strong spring

※Coupling type

TGF 20 - L 5 - TH20PD2 X CH30PD2 - N18

Series

Size




Type
5:Type 5
7:Type 7

Shock guard side
Shaft bore code

Coupling side
Shaft bore code

Set torque value
N・m
Spring strength
Details regarding shaft bore codes
Shaft bore tolerance Shaft Bore Diameter Keyway tolerance Set screw positioning
T H 20 P D2
C H 30 P D2
T:Shock guard side
C:Coupling side
F:F7
G:G7
H:H7
Shaft bore diameters are in 1mm units. J:New JIS Js9(Standard )
P:New JIS P9
F:Old JIS F7

[Click to enlarge ]

Note) The set screw position of the Shock Guard side is as seen from the adjustment nut side, and the set screw position of the coupling side is as seen from the hub side.

■Tsubaki model No. navigation

Selected model No. :

*Select each item in order from the left to make sure a valid model number is generated.

Series Size Spring strength Type Shaft Bore Diameter Shaft bore
tolerance
Keyway
tolerance
Set screw positioning Set torque
value
 TGF

 No-coupling type




Coupling


Shock guard side
6.0

20
  N・m
Coupling side

List of Model Numbers

※Click the model No. for detailed information.

Set torque range
N・m
No-coupling type Coupling type
Range of Shaft Bore Diameters
mm
Model No. Bore Diameter Range
on Coupling Side  mm
Model No.
Type 2 Type 3 Type 5 Type 7
6.0~20 10~20 TGF20-L2 TGF20-L3 17~42 TGF20-L5 TGF20-L7
12~40 TGF20-M2 TGF20-M3 TGF20-M5 TGF20-M7
24~80 TGF20-H2 TGF20-H3 TGF20-H5 TGF20-H7
10~74 12~30 TGF30-L2 TGF30-L3 17~60 TGF30-L5 TGF30-L7
20~147 TGF30-M2 TGF30-M3 TGF30-M5 TGF30-M7
40~294 TGF30-H2 TGF30-H3 TGF30-H5 TGF30-H7
30~156 22~45 TGF45-L2 TGF45-L3 27~74 TGF45-L5 TGF45-L7
60~313 TGF45-M2 TGF45-M3 TGF45-M5 TGF45-M7
120~568 TGF45-H2 TGF45-H3 TGF45-H5 TGF45-H7
50~269 32~65 TGF65-L2 TGF65-L3 47~95 TGF65-L5 TGF65-L7
100~539 TGF65-M2 TGF65-M3 TGF65-M5 TGF65-M7
200~1078 TGF65-H2 TGF65-H3 TGF65-H5 TGF65-H7
300~1225 47~90 TGF90-L2 TGF90-L3 52~118 TGF90-L5 TGF90-L7
600~2450 TGF90-M2 TGF90-M3 TGF90-M5 TGF90-M7
1200~4900 TGF90-H2 TGF90-H3 TGF90-H5 TGF90-H7

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.

TG Sensor
AC Type DC Type
Model No. TGS8 TGS8DN
Supply
voltage
Rating AC24~240V -
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
×
-- Load Residual Voltage Characteristics -- (Drag to move. )

Load Residual Voltage Characteristics

Load Residual Voltage Characteristics

Dimension drawings

AC Type TGS8

AC Type

DC Type TGS8DN

DC Type

Sizing

Our selection calculator will select the right Shock Guard from Tsubaki's entire Shock Guard series to match your usage conditions.

Click the "Sizing" tab at the top of this page.

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Torque adjustment

1.Read the torque scale value that corresponds to the required torque from the torque correlation charts and tighten the adjustment nut to that value.
To tighten the adjustment nut, hook a hook spanner or insert a round bar in the hole in the periphery of the nut, and then turn the nut.
(Note )If you are using the TGF30 or TGF45 size and a high torque (200 N・m or higher) is required, use the dedicated hook spanner (sold separately).

If you are using the TGF65 or TGF90 size and a high torque is required, loosen the bolt to adjust the torque, turn the adjustment nut to the required torque scale value, lock the adjustment nut with the hex cap setscrew, and then retighten the bolt.

Torque adjustment

⇐ Torque scale

The torque of the product does not always match the correlation chart below, so use it as a guide.

2.When the torque is determined, write down the torque on the name plate so that you can easily set the torque to the previous value even after an overhaul.
If you mark matchmarks on both the nut and the edge of the hub, you can reset the torque more precisely.

Torque Correlation Chart

Torque Correlation Chart