Development of [Chainsring][Hoist][Sringchain][Coil tong][Coil riftar] etc. vehicular equipment including [Clamp][Tong][Riftar][glove] as hang tool.

The first step in avoiding accidents is to follow the specified procedures for handling and inspecting clamps. This will also improve operating efficiency and extend the service of the clamps,which will reduce costs.

1:Indoor storage by clamp type
・	At the end of work each day, never leave the clamps outdoors.
・	Be sure to store them in a protected area, sorted by clamp type

2:Routine inspection and maintenance
・	Be sure to inspect the clamps before starting work each day and service them at the end of work each day.
・	Inspect and service the clamps regularly, whether the clamps have been used or not. (At least once a month)
・	When inspecting or servicing the clamps,be sure to lubricate them.

3:The use of damaged clamps is strictly prohibited
・	Deformed or damaged clamps must not be used. They should be replaced promptly.
・	Before starting work,check the inspection label.(which shows the month)of each clamp.

4:Early replacement
・	It is dangerous to keep using replaceable parts right up to the very limit of what is permissible.
・	In the field, when hardened objects are being lifted, or when lots of steel plates with the same thickness are being handled one after another, replace the cams and swivel jaws ahead of schedule.

The following table is a set of safety standards to be used when inspecting clamps. If any one item in the table applies to one of your clamps, stop using that clamp and contact us.
(Safety inspection standards table)

Main body

■Simple unspectior medhods and dangerous Sym.
(*Clamps which exceed the working limit should be replaced or disposed of)

	Difference betweenthe inside width (A) of the main bady and the widthof link (B) Less than 0.5mm(too small) More than(too large) 4.0mm>A-B>0.5mm

■Checklist

Deformation /cracks

■Simple inspection methods and dengerous symptoms

・	The lifting shackle does not operate smoothly under no load.
・	The difference between the inside width of the main body and the width of the link is too large or too small.
・	Enlarged or worn openings.
・	Worn or deformed lifting shackle pin guide grooves.

Main body's bolts

■Simple checklist
	Bent bolts
■Simple inspection methods and dengerous symptoms
	Excess play cannot be removed by tightening.

Main body's pins

■Checklist
	Bent pins /faulty welding
■Simple inspection methods and dengerous symptoms
	The main body is deformed or there are small cracks on the welded section. (In at least two places)

Lifting shackle

■Simple working life limits
(*Clamps which exceed the working limit should be replaced or disposed of)

・	Pin replacement is impossible
・	Deformation limit: Up to 20°

■Checklist

Bent / twisted / elongated

■Simple inspection methods and dengerous symptoms

The lifting shackle can be moved vertically more than 2mm with the locking latch applied. (Indicates elongation.)

Cam (serrated plate)

■Simple working life limits
(*Clamps which exceed the working limit should be replaced or disposed of)

Clamp capacity	Wear limit width
0.5 ton	0.5 mm
1 ton	0.8 mm
2 ton	0.8 mm
3 ton	1.0 mm
5 ton	1.2 mm

■Checklist

Worn/clogged / broken teeth

■Simple inspection methods and dengerous symptoms

・	No tooth-marks are left on objects that are lifted. (worn)
・	Must not be used when two or more broken teeth are found.

Cam pin or shackle pin

■Simple working life limits
(*Clamps which exceed the working limit should be replaced or disposed of)

■Checklist

Bent / worn

■Simple inspection methods and dengerous symptoms

・	When the cam pin is rotated, the cam vibrates or wobbles.(Bent)
・	The lifting shackle or the cam is loose.(worn)

Swivel jaw (jaw)

■Simple working life limits
(*Clamps which exceed the working limit should be replaced or disposed of)

Clamp capacity	Wear limit width
0.5 ton	0.5 mm
1 ton	0.8 mm
2 ton	0.8 mm
3 ton	1.0 mm
5 ton	1.2 mm

■Checklist

Worn/clogged / broken teeth

■Simple inspection methods and dengerous symptoms

・	No tooth-marks left on objects that are lifted. (worn)
・	Must not be used when clogged with paint.
・	Must not be used when two or more broken teeth are found.

Cam pin hole or shackle pin hole

■Working life limits (*Clamps which exceed the working limit should be replaced or disposed of)
Deformation and wear limit
■Checklist
	Elongated/worn/deformted
■Simple inspection methods and dengerous symptoms
	The lifting shackle or the cam is loose.

Locking latch

■Working life limits
(*Clamps which exceed the working limit should be replaced or disposed of)

Locking latch [Spring]

■Checklist

Elongated /deformed /reduced tension

■Simple inspection methods and dengerous symptoms

・	When the opening is closed under no load and the latch is locked, the spring does not work properly or comes off easily.
・	When the opening is placed over an object , it is difficult to lock the latch.

Locking latch [Locking bolt] [bolt hole]

■Checklist

Worn/deformed/elongated

■Simple inspection methods and dengerous symptoms

When the spring has been replaced, the latch does not work properly and comes off easily.