• National Clamps
    • Over 95% market share for Lifting clamps in Korean Shipbuilding Industry
    • Over 35 years of proven safety history in Korean shipbuilding industry
National Clamps

PRODUCTS

  • Screw Clamp

 
 

Products Screw Clamp
Model NPC-A, NPC-T, NPC-TB, NPC-DB
Manufacturing Origin South Korea
Factory Busan, Korea
 Description

    A screw clamp for hanging the hook of a lever block when building vessels and manufacturing(attaching) construction plants.

NPC-A

WLL(TON) Jaw Opening A B C D1 D2 E F ØG I ØJ K Weight(kg)
1 0-25 30 30 168 25 25 46 98 38 17 25 40 2.7
1.5 0-25 25 32 166 25 25 46 98 38 18 28 45 2.7
2 0-30 30 35 182 25 25 46 100 40 20 30 50 2.9
0-40 45 30 182 25 25 46 103 40 20 30 48 3.1
3 0-35 40 38 205 30 38 46 116 42 22 36 60 4.4
0-60 65 40 235 30 40 51 121 45 22 36 61 6.3
0-100 105 50 323 37 55 60 162 50 30 36 75 16.1
5 0-50 52 52 265 35 50 59 152 55 28 40 70 10.3
0-70 75 55 295 38 50 62 160 55 30 40 70 12.0
No. ASS’Y NAME No. PART NAME No. ASS’Y NAME No. PART NAME
1 BODY - - 4 BEARING ASS’Y 4-1 BEARING
2 SCREW ASS’Y 2-1 SCREW 4-2 SPRING PIN
2-2 HANDLE 5 END PLATE - -
3 SWIVEL JAW - - 6 SNAP RING - -

[Features]

  • The NPC-A is a screw clamp used to prevent accidents caused by the widening, slipping or breakage of the hook because the load is concentrated  at the end of the hook when hanging the hook of a lever block and a chain block directly on a work piece.
  • The NPC-A is a safe clamp designed to prevent a work piece from slipping  as the jaw opening of the clamp gets smaller by the slope which is proportional  to the load on the spherical swivel jaw built in the jig bearing which works as gearing on the opposite side of the screw.

[How to use]

  • Insert a steel plate into the inside end of the clamp's jaw opening and then completely tighten the screw.

[Warnings]

  • Do not exceed the rated capacity specified on the clamp.
  • Use a work piece only which falls within the jaw opening range specified in the instruction manual.
  • If the load is placed laterally, not straightly, on the eye hole, use only 1/2 of the rated capacity.
  • Never vertically erect a work piece with this model.
  • For horizontal lifting, the clamping point must be two or more. When clamping, the clamps must face each other, not look in one direction.
NPC-T, NPC-TB

MODEL WLL(TON) Jaw Opening A1 B C D1 D2 E F ØG ØH I ØJ K Weight(kg)
NPC-T 1.5 0-25 26 30 165 24 28 15 135 40 17 19 28 17 2.8
3 0-35 40 34 198 27 33 20 160 42 22 20 30 22 4.7
5 0-50 52 50 264 37 50 32 218 58 27 28 40 27 11.5
7.5 0-45 50 48 257 40 50 35 226 55 30 35 40 80 14.5
NPC-TB 2 0-40 43 30 179 24 60 20 167 40 40 22 30 49 3.6
No. ASS’Y NAME No. PART NAME No. ASS’Y NAME No. PART NAME
1 BODY - - 4 BEARING ASS’Y 4-1 BEARING
2 SCREW ASS’Y 2-1 SCREW 4-2 SPRING PIN
2-2 HANDLE 5 END PLATE - -
3 SWIVEL - - 6 SNAP RING - -

[Features]

  • The NPC-T and NPC-TB are screw clamps used to prevent accidents  caused by the widening, slipping or breakage of the hook because the load  is concentrated at the end of the hook when hanging the hook of a lever  block and a chain block directly on a work piece.
  • When using with a lever block, the NPC-T and the NPC-TB are efficient  clamps designed to simultaneously perform the up-and-down straight line  work which is between the eye hole at the upper side and the screw at the  lower side, and the lateral work which is in either way of thele ft and the right.
  • The NPC-T and the NPC-TB are safe clamps designed to prevent a work  piece from slipping as the jaw opening of the clamp gets smaller by the  slope which is proportional to the load on the spherical swivel jaw built in  the jig bearing which works as gearing on the opposite side of the screw.

[How to use]

  • Insert a steel plate into the inside end of the clamp's jaw opening and then completely tighten the screw.

[Warnings]

  • Do not exceed the rated capacity specified on the clamp.
  • Use a work piece only which falls within the jaw opening range specified in the instruction manual.
  • If the load is placed laterally, not straightly, on the eye hoel, use only 1/2 of the rated capacity.
  • Never vertically erect a work piece with this model.
  • For horizontal lifting, the clamping point must be two or more. When clamping, the clamps must face each other, not look in one direction.
NPC-DB

WLL(TON) Jaw Opening A B C D1 D2 E F G I ØJ K Weight(kg)
1.5 1-25 30 34 235 20 30 46 105 38 16 28 44 3.5
2 1-30 35 36 255 22 35 48 112 40 18 30 48 4.3
3 1-35 40 40 280 27 43 52 130 45 20 34 56 6.2
5 0-50 55 52 378 35 55 60 155 55 30 40 70 13.1
0-70 75 52 390 40 52 67 168 55 30 40 74 15.4
6 0-100 110 62 445 48 60 79 192 55 30 42 84 22.8
No. ASS’Y NAME No. PART NAME No. ASS’Y NAME No. PART NAME
1 BODY - - 5 SPACE - -
2 SCREW ASS’Y 2-1 SCREW 6 SNAP RING - -
2-2 HANDLE 7 SHACKLE - -
3 SWIVEL JAW - - 8 SHACKLE BOLT ASS’Y 8-1 BOLT & NUT
4 SHAFT - - 8-2 SPRING PIN

[Features]

  • The NPC-DB is a screw clamp used to prevent accidents caused by the widening,  slipping or breakage of the hook because the load is concentrated  at the end of the hook when hanging the hook of a lever block and a chain block directly on a work piece.
  • The NPC-DB is a convenient and efficient clamp with the shackle which rotates 360° right and left, making work possible in all directions (up and down, left and right).

[How to use]

  • Insert a work piece into the inside end of the clamp's jaw opening and then completely tighten the screw.

[Warnings]

  • Do not exceed the rated capacity specified on the clamp.
  • Use a work piece only which falls within the jaw opening range specified in the instruction manual.
  • If the load is placed laterally, not straightly, on the shackle, use only 1/2 of the rated capacity.
  • Never vertically erect a work piece with this model.
  • For horizontal lifting, the clamping point must be two or more. When clamping, the clamps must face each other, not look in one direction.
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