ADJUSTABLE CLAMPING RANGE UNIVERSALLIFTING CLAMP for Concrete material(Non-marring type)

AMC 250N
AMC 500N

Operation ManualThis operation manual explain the basic usage and handling of clamps.
Please do not fail to carefully read this instruction manual before use
and never fail to follow each attention of usage for the proper
handling of clamps.

■ Applications
Apply this clamp to the carriage, loading and unloading of concrete products.

■ Features
1. You can obtain a wide range of clamping by changing the position of the ratch according to the size of the work.
2. You can lift the work well-balancedly by setting the shackle at the central gravity point.
3. Pads continue to always press against the work due to the spring built in the unit, which is ready to lift the work.
4. Use of polyurethane rubber material for pads does not damage the work.
5. Ensure the clamping of workpiece by applying spike mechanism for pad type.
6. The clamping power increases in proportion to the weight of the work, which ensures a safety operation.

■Specification
Item No.

Capacity

Clamping Ranges

N.W.

AMC 250N

250 kg10～240mm

5.4 kgAMC 500N

500 kg10～240mm

7.5 kg● Table of clamping ranges
Position of the hole ofthe adjustable pins
AMC 250N
AMC 500N(Unit: mm)

AB

CDEF

10～40

40～80

80～120120～160

160～200

200～240● Major Dimensions

Mark ※ is the dimension of AMC500N

● Table of Parts
No.

Parts Name

Q'ty

No.

Parts Name

Q'ty

No.

Parts Name

Q'ty

1Shackle

1

9Spring for pads

2

17

U-nut

22

Main unit

1

10Bolts of shackle

1

18

U-nut

23

Arm

111

Bolts for pads

2

19

U-nut

14Ratch112

Bolts for main unit

120Spring pin

15Pad

213

121

Flat washer

46

Lever

114

122

Throttle pin

17

Adjustable pin

115

Collar (long)

123・24

Spike ・ Hex nut

88

Spring for arm

116

Collar (short)

1

Bolts for lever(long)
Bolts for lever(short)■ Method of operation
1. Adjust the position of the adjustable
pin according to the sizes of the work.
When shifting the position of theadjustable pin, put the pin through themain unit to the very end until theToggle head

Main unit
Toggle head
Ratch

Adjustable pin

toggle head appear.

Main unitAdjustable pin

Ratch

2. Adjust the position of the shackle according to the central gravity points.
ShackleAdjustable pin

3. When the release lever is raised by pressing down the arm withyour hand, you are now in a position to lift the work.

ArmLever(4) After carrying the work to the destination, lower the clamp till the wire rope is fully loosened.

(5) When you press down the arm with your hand, the release lock is set on, and in such a state of release,
you can lift the clamp alone.

Attention:
This clamp can be used to lift the eccentric work as per the below drawing well-balancedly by setting the shackle at thecentral gravity point. But, when lifting well-balancedly, adjust the shackle attaching position and subtract the lifting
load capacity.
Capacity: 140kg ※280kg
Capacity: 165kg ※330kg
Capacity: 200kg ※400kg
Holes for balance lifting

The mark ※ is for AMC500N

PadU-nut■ Replacing method for parts(1) Replacing method for pads

Spring① Loosen the bolt and U-nut and detach the pad and spring.
② Attach the new pad and spring to the ratch.
③ Tighten the bolt and U-nut.

Bolt
Ratch / Arm(2) Adjusting and replacing method of spikes
When using pad as non-marring pad or spike is worn,
Hex Nut

the spikes need to be adjusted and repaired.
① Loosen the hex nut, and adjust and replace by turning
the spikes by hex wrench or flat-head screw driver② Tighten the hex nut.

SpikeCautions■ Cautions in operation
2. Lifting must be in principle vertical lifting.

1. When you lift the work at two points, use thePulling the clamp sideways deprives thesimple balance so that the work is verticallyclamping strength from the pads. Neverlifted at two points.

execute a horizontal pullingbalance3. You are not allowed to lift a pile of U-shaped
gutters, concrete boards at one time.

4. Ensure that the pads have securely clamped thework before the lifting operation.

5. If you lift the work away from its central gravity
point, the gripping position of the clamp threatens toslide, which may cause an incident. So, never do that.

Less than
5 degrees

6. Never apply this clamp to the extracting buried
concrete products.

■ Cautions for safety
1. Do not use this unit beyond the allowable load and outside the clamping ranges.
2. Do not apply this unit to any other products than concrete ones.
3. Do not apply this unit to concrete products under curing.
4. Do not enter the area where the lifted work may drop.
5. Do not give any impact to the work or the lifting clamp.
6. Avoid any abrupt movement or stop of the work.
■ Cautions for management
1. Never fail to check before use for detachment and the level of abrasion of the polyurethane rubber pads andabnormalities with any other parts.
2. Periodically fill in oil to moving parts.
3. Do not remodel the unit. Addition of heat and any processing will substantially degrade the quality (strength) of theunit.
4. When water, oil, sands, ice, or snow is on the surface of the concrete products to lift, there threatens to be a slipping
accident. Never fail to remove any of them from the concrete products.