Products Power Transmission Products

  • Shock Guard®

TGX Shock Guard®

1.Features

  • Capable of detecting overload with the non-contact type TG Sensor and stopping the motor and outputting an alarm
  • Due to its original ball and wedge construction, there is no backlash
  • The motion lost when tripped is minimal
  • The unique assembly means the ball and wedge configuration engages in only one position
  • Trip torque can be freely adjusted by simply turning the adjusting nut
  • Easy to verify the torque setting with the easy-to-read rpm and angle indicators
  • The TGX Coupling Type is also available

2.Structure

TGX Structure

3.Ball and wedge construction (Pat.)

Pat. illustration
During normal operation (engagement)
Torque is transmitted from the hub to the drive ball (ball) to the driven flange. (Or the reverse.)
Pressure is applied by the coil spring to the drive ball (steel) so that it is held against the hub and driven flange. The contact area between it and the plate's drive ball (steel) is tapered, resulting in a constant gapless state between the drive ball (steel) and the hub's V-shaped retaining area.
This is the ball and wedge construction (Pat.).
During overload (trip)
During overloads, the drive ball (ball) pops out of the pocket and begins to roll.
There is no sliding, only rolling, so the nominal overrunning drag torque is extremely low for excellent durability.
Reset is automatic. The drive ball (ball) falls back into its original pocket when operation begins again. As with the TGB Series, the five spots for the drive balls (ball) and pockets are unevenly arranged so that the ball will always engage in one position. There is no phase misalignment.

4.Model Numbering Example - TGX Series

TGX 35 - H - T H 30 J D2 - N147
Series Size Spring strength Shock Guard side Shaft bore tolerance Shaft bore diameter (1mm units) Keyway tolerance Set screw positioning Set torque value

Size

  • 10
  • 20
  • 35
  • 50
  • 70

Spring strength

  • L: Weak
  • M: Medium
  • H: Strong

Shaft bore tolerance

  • F: F7
  • G: G7
  • H: H7
  • J: JS7
  • P: P7
  • M: M7
  • N: N7
  • K: K7
  • R: R7

Keyway tolerance

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

Set screw positioning (Position from adjusting nut side)

  • D0 Set screw positioning fig.
  • D1 Set screw positioning fig.
  • D2 (Standard) Set screw positioning fig.
  • D3 Set screw positioning fig.
  • D4 Set screw positioning fig.
  • D5 Set screw positioning fig.
  • D6 Set screw positioning fig.
  • D7 Set screw positioning fig.
  • D8 Set screw positioning fig.

Set torque value

  • The torque setting is shown in N·m units.
  • *Shown to one decimal place when the torque setting is less than 10N·m.
  • Code T indicating Shock Guard side is used for no-coupling types as well.

5.Model Numbering Example - TGX Series Coupling Type

TGX 50 - L C - T H35JD2 X C H45ED2 - N98
Series Size Spring strength Type Shock Guard side Same notation as no-coupling type Coupling side Same notation as no-coupling type Set torque value

If the shaft bore is a pilot bore, the code for the Shock Guard side will be TR and the code for the coupling side will be CR.

Size

  • 10
  • 20
  • 35
  • 50
  • 70

Spring strength

  • L: Weak
  • M: Medium
  • H: Strong

Shaft bore tolerance

  • F: F7
  • G: G7
  • H: H7
  • J: JS7
  • P: P7
  • M: M7
  • N: N7
  • K: K7
  • R: R7

Keyway tolerance

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

Set screw positioning *

  • D0 Set screw positioning fig.
  • D1 Set screw positioning fig.
  • D2 (Standard) Set screw positioning fig.
  • D3 Set screw positioning fig.
  • D4 Set screw positioning fig.
  • D5 Set screw positioning fig.
  • D6 Set screw positioning fig.
  • D7 Set screw positioning fig.
  • D8 Set screw positioning fig.

Set torque value

  • The torque setting is shown in N·m units.
  • *Shown to one decimal place when the torque setting is less than 10N·m.
  • Note: The set screw position of the Shock Guard side is as seen from the adjusting nut side, and the set screw position of the coupling side is as seen from the hub side.

Model numbers for Shock Guards changed on April 2, 2018.