SC VL Series Istruzioni operative

Operation, Maintenance and

Repair Manual for

VL Series Clamps

The VL Series includes models:

Safety clamps, inc.

Home of the “big Bite” Lifting Clamp

VLC

VL-SJ

VLX

PDS

(Also includes the listed models with

the Universal Lifting Shackle, Auxiliary Lock,

and/or Stainless Grippers)

Excludes Models VL-BC, and VL-Channel

Products manufactured by Safety Clamps, Inc.

meet and/or exceed:

ANSI/ASME B30.20/ BTH-1

Design Category: C

Service Class: 4

Warning

Prior to operating your Safety Clamp, please ensure

All operators read and understand this manual.

Eﬀective January 1, 2018

This manual supersedes all previous VL manuals.

Serial # _______________________

Model _______________________

Max. Rated

Capacity in Tons _______________________

Jaw Opening _______________________

Safety Clamps, Inc.

Repair Service Center

Call 1-800-456-2809 for a Return AuthorizationΝumber.

Include:

Model

Rated Capacity

Serial Number

You will receive a written quote within 24 hours of receipt of your

Safety Clamp.

Your Safety Clamp will be repaired, tested, re-certiﬁed, painted, and

shipped within 24 hours of authorization.

We also perform periodic inspections and re-certiﬁcations.

It’s that easy! Call 1-800-456-2809 for more details.

Go to www.safetyclamps.com to register your clamp to receive the most

appropriate service and product support for your clamp and new product

updates as they come available.

10 Year Limited Warranty

All products manufactured by Safety Clamps, Inc. carry a limited warranty

that the product is free from defects in materials and workmanship. This

warranty applies only to the original end user of the clamp and is valid for 10

years from the date of purchase.

Conditions

This warranty only covers defects in materials and workmanship and only if

the clamp has been inspected, maintained, and operated within the

guidelines of the clamp’s Operation, Maintenance, and Repair Manual. The

warranty does not cover wear to parts such as pins, grippers, lock springs,

etc. If a defect is found within the warranty period, the clamp will be repaired

or replaced by determination of the manufacturer.

No warranty is given due to: regular wear; incorrect use; overload;

modiﬁcation of the clamp; improper maintenance and/or repair.

GENERAL INFORMATION

1. The VL series includes models:

VLC

VLX

PDS

2. Always choose the proper clamp and rated capacity for the material to

be lifted.

3. The VL series Safety Clamps are designed for lifting, turning, and

transferring of steel plate, sheet, and/or structural shapes.

4. The VL series clamps may be used to lift material from a vertical

position (Fig. 1) or from horizontal to vertical to horizontal through

a 180° arc (Fig. 2).

Note: The optional auxiliary push button lock is not required to rotate

material through a 180° arc.

5. The VL series models are rated to lift material with a hardness up to

450 Brinell (48 Rockwell C).

6. For VL series models, the minimum rated capacity is 10% of the

maximum rated capacity of the clamp.

7. Remote release is standard on all locking models except models with

an auxiliary push button lock handle.

8. The operator must read and understand the Operator’s Manual before

using a Safety Clamp.

Safety Clamps, Inc. VL Series Clamps

Figure 1 Figure 2

Safety Clamps, Inc. VL Series Clamps

OPERATING AIDS

1. The VL series clamps should not be used to handle material with

temperatures below 0° F or above 225° F. These temperature

restrictions apply to both the ambient temperature and the

temperature of the material to be lifted.

2. Do not use the VL series clamps for horizontal transfer of materials.

3. Do not use clamps on materials with a hardness in excess of

450 Brinell (48 Rockwell C).

4. Do not lift plate with mill scale, grease, or any other coatings that may

prevent gripping surface from making solid contact with plate.

5. Do not lift material from the side with a VL series clamp (Fig. 4) unless

using a clamp with the Universal Lifting Shackle.

Note: As the angle of side load increases, the rated

capacity decreases (Fig. 5).

6. Never exceed ten degrees (10°) side load with a VL series clamp that

has a standard lifting shackle (Fig. 3).

7. Do not lift more than one plate at a time.

8. Always ensure the clamp is seated properly on the material to be

lifted. Place the gripping pad (D, Fig. 7) against the material

when locking the clamp closed to ensure the rotating gripping cam(s)

(C, Fig. 7) contact the material in the position they will make the lift.

9. Make sure the load to be lifted is properly balanced. Multiple clamps

may be needed to balance the load.

10. Never lift or transfer material over or near people.

11. Always lock the clamp closed before making a lift. Don’t make a lift

with the lock in the open or “locked open” position.

12. Do not lift clamp with an open-end hook.

13. Do not alter clamp. Do not weld, grind, or modify the clamp in any way.

14. If a clamp has been overloaded or damaged in any way, take the

clamp out of service immediately.

15. Do not improvise and misuse the clamp. Always use correct clamp for

the lift.

16. For VL series models, the minimum rated capacity is 10% of the

maximum rated capacity of the clamp. The minimum rated capacity

ensures the load is not too light for the clamp to properly bite into the

material.

Safety Clamps, Inc. VL Series Clamps

Figure 3: Never exceed 10° side loading with a VL series clamp unless using a

clamp with a Universal Lifting Shackle. When using a clamp with a standard shackle,

always position the clamp so the direction of force applied by the crane is in line with

the lifting shackle.

45°

MAX.

Never

Max 10000100Max

Yes Yes

Figure 4: Never lift material from the side with a “VL” series clamp unless using a

clamp with the Universal Lifting Shackle.

Universal

Shackle

Yes

Standard

Shackle

Never

0°

30° 30°

45°

90°

45°

90°

100% 75%

75%

50%

Figure 5: The rated capacity of a clamp with the Universal Lifting Shackle decreases

as the angle of side load increases.

Angle of Side Load % Maximum Rated Capacity

0° to 30° = 100%

30+° to 45° = 75%

45+° to 90° = 50%

OPERATION

Inspection Before and After Each Use

The Safety Clamps inspection procedures meet and/or exceed the

requirements set forth in the ASME B30.20 Below-the-Hook Lifting Devices

guideline.

1. Before using any Safety Clamp, the operator must read and understand

the Operator’s Manual in its entirety.

2. All Safety Clamps should be inspected before and after each use.

Do not use if any components are bent, elongated, gouged, nicked

excessively, worn, and/or damaged. Make sure that nuts, bolts, pins,

and other mechanical fasteners are tightened and secured.

3. Be sure the clamp to be used is the proper clamp for the job. Check

the rated capacity and jaw opening stenciled on the Identiﬁcation Tag.

Both should equal or exceed the requirements for the load to be lifted.

4. For VL series models, the minimum rated capacity is 10% of the

maximum rated capacity of the clamp. The minimum rated capacity

ensures the load is not too light for the clamp to properly bite into the

material.

Warning: Never exceed the rated capacity or use on material that

is not within jaw range of the clamp. Never lift material that does

not meet the minimum rated capacity of the clamp.

5. Do not use the clamp if the Identiﬁcation Tag or the Warning Tag is

missing or illegible.

6. Inspect the gripping cam(s) (SC-50 or SC-42, Fig. 8) and gripping pad

(SC-70, Fig. 8) for wear and defects. Gripping surfaces must be sharp

and free of foreign matter.

7. Inspect the condition of the body for wear, damage and distortion,

particularly in the area of the jaw opening and holes for pins.

8. Inspect the lifting shackle (SC-10, Fig. 8) and all pins for wear and

damage.

9. The lock spring (SC-61, Fig. 8) must have a deﬁnite amount of tension

when the lock is moved to the “Lock Closed” position, with minimal

material in the clamp. Note: Do not allow the gripping cam(s) to come

into contact with the gripping pad as this may cause damage to the

gripping edges.

Safety Clamps, Inc. VL Series Clamps

OPERATION

Inspection Before and After Each Use

10. For clamps with the auxiliary push-button locking handle, the lock

button in the auxiliary lock body bolt (SC-16Aux, Fig. 8) must have a

positive spring action to project it out and engage the lock handle

when the handle is moved to the “Lock Closed” position.

11. Remove from service and tag any clamp in need of repair indicating

the problem area and bring to supervisor’s attention. A full periodic

inspection is to be performed at this time by qualiﬁed personnel (see

periodic inspection, p. 11). The next periodic inspection will be timed

from when the clamp is returned to service.

12. Make sure that all roll pins are securely in place.

13. Never use a clamp in need of repair.

OPERATING AIDS

1. Do not use the VL series clamps for horizontal transfer of materials.

2. Do not use clamps on materials with a hardness in excess of

450 Brinell (48 Rockwell C).

3. Do not lift plate with mill scale, grease, or any other coatings that may

prevent gripping surface from making solid contact with plate.

4. Never exceed ten degrees (10°) side load with a VL series clamp that

has a standard lifting shackle (Fig. 3).

5. Do not lift more than one plate at a time.

6. Always ensure the clamp is seated properly on the material to be

lifted. Place the gripping pad (D, Fig. 6 & 7) against the material

when locking the clamp closed to ensure the rotating gripping cam(s)

(C, Fig. 7) contact the material in the position they will make the lift.

7. Make sure the load to be lifted is properly balanced. Multiple clamps

may be needed to balance the load.

8. If a clamp has been overloaded or damaged in any way, take the

clamp out of service immediately.

9. Do not improvise and misuse the clamp. Always use correct clamp for

the lift.

10. For VL series models, the minimum rated capacity is 10% of the

maximum rated capacity of the clamp.

Safety Clamps, Inc. VL Series Clamps

OPERATION

Loading the clamp

1. When placing the clamp onto the material, the clamp should be in the

“locked open” or open position with the gripping cam(s) out of the jaw

opening. This helps to prevent damage to the gripping teeth during

2. Center the clamp so the load is balanced when lifted. When using

more than one clamp, make sure the clamps are positioned to share

equal loads.

3 For a clamp with a standard lifting shackle (SC-10), make sure the

clamp is positioned so the direction of force applied by the crane is in

line with the lifting shackle (Fig. 3).

WARNING: Never exceed 10° side loading with a VL series clamp

with a standard Lifting Shackle (Fig. 3).

4. Place the jaw of the clamp around the material to be lifted. Make sure

the clamp is positioned so the edge of the material is 1/8” to 1/4” from

the back of jaw opening and the gripping surfaces are in full contact

with the material. When lifting from a horizontal position, our unique

design allows the operator to load the clamp with the gripping pad

(D, Fig. 7) below the plate or on top of the plate.

5. Secure the clamp in the “locked closed” position. Do this by seating

the clamp on the material with the gripping pad (D, Fig. 6) against the

material and rotating the lock handle (A, Fig. 7) until the lock inside

the body is positioned against the stop (B, Fig. 7). The gripping cam(s)

(C, Fig. 7) will rotate into the jaw and engage the material at the point

where they will bite into the material once the lift is started.

Note: When using a clamp with the auxiliary push-button lock handle,

ensure the auxiliary lock is fully engaged and the spring-loaded push

button on the handle is ﬂush with the push-button retainer ring.

WARNING: Not properly seating the clamp may cause the clamp

to slide on the material once the lift begins. Always ensure the

grippers are seated properly. Check this by pushing away on the

clamp body as you pull back on the lifting shackle (E, Fig. 7) and

look to ensure the gripping cam(s) and gripping pad are engaging

the material.

6. Once the clamp is properly locked closed onto the material, the clamp

is now ready to make a lift.

WARNING: The operator and all other personnel should be fully

clear of the lifting area.

Safety Clamps, Inc. VL Series Clamps

OPERATION

Lift and Transfer of Material

1. As the operator begins to make the lift, ensure the load is balanced.

If the load is not balanced, lower the material and adjust the position

of the clamps accordingly and follow the guidelines under the “Loading

the clamp” section. Never lift or transfer material when the load is not

balanced.

2. During transfer of the material from one location to another, the

operator should ensure the load is steady during transfer and not

allow the load to bump or strike other objects.

3 Upon reaching the material’s destination, lower the clamp and material

to a secure position until the tension is relieved on the lifting shackle

(E, Fig. 6).

4. Once the load is at rest and secured, rotate the lock handle (A, Fig. 6)

to the “locked open” position or for VLC & AVLC the open position. This

will disengage the clamp from the material and for lock open models

will lock the gripping cam(s) (C, Fig. 6) out of the jaw opening to

protect the gripping teeth. If the clamp is in a hard to reach position,

push in on the lifting shackle (E, Fig. 6) after the lock handle (A, Fig. 6)

is released to help facilitate locking the clamp open.

Note: For lock open models always store the clamp in the “locked

open” position to protect the grippers and help ensure longer use.

If the clamp is not locked open it can allow the grippers to strike each

other, possibly causing damage to the gripping teeth/edges. For

VLC and AVLC models, do not allow the gripping cams to strike the

gripping pad. Slowly lower the gripping cams into the jaw when the

clamp is not in use.

Warning

Operator must follow all guidelines in each section before making a lift.

Safety Clamps, Inc. VL Series Clamps

Figure 6: “Locked Open” /

Open Position Figure 7: “Locked Closed”

Part # Parts List for VL Series Models 1/2 ton & 1 ton, & 2 ton VL-SJ

SC-10 Lifting Shackle

SC-10U Universal Lifting Shackle

SC-12 Lifting Shackle Pin

SC-14 Universal Lifting Shackle Pin

SC-16 Body Bolt Assembly (1 spacer, bolt, & nut)

SC-16AUX Body Bolt Assembly for Auxiliary Lock (1 spacer, bolt, & nut)

SC-35 Connecting Yoke-Cam Link Pin

SC-37 Connecting Yoke Body Pin with roll pin

SC-50 Gripping Cam Assembly (SC-42, SC-44, (2) SC-46)

SC-50ST Stainless Gripping Cam Assembly

SC-52 Gripping Cam Spacers

SC-54 Gripping Cam Body Pin with (2) roll pins

SC-61 Lock Spring

SC-65 Lock Handle Assembly - includes Lock, Handle, Handle Spacer,

(1) roll pin for handle & lock, (1) retainer roll pin for lock spring

SC-66 Auxiliary Lock Handle Assembly - includes Lock,

Lock Handle with push button, and Lock Handle Spacer

SC-70 Gripping Pad with bolt and locknut

SC-70ST Stainless Gripping Pad with bolt and locknut

SC-80 Connecting Yokes (pair) and spring connector pin

Safety Clamps, Inc. VL Series Clamps

Figure 8

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