Chain blocks manufactured from durable, high grade steel are pretty simple tools for lifting loads which are made up of lifting chains, lifting mechanism and hooks. The quality is similar to Jet chain block or Nitchi chain block but made in china is competitive than these hoists.
VK Chain blocks manufactured from durable, high grade steel are pretty simple tools for lifting loads which are made up of lifting chains, lifting mechanism and hooks. The quality is similar to Jet chain block or Nitchi chain block but made in china is competitive than these hoists. Hand chain sitting on a wheel inside the lifting mechanism which has cog, axle, drive shaft, gears and sprockets, the special pockets for moving wheel through hand chain that is pulled by hand, Lifting chain looping lifting mechanism too lifts/lowers a load by a bottom grab hook where load directly or attach a load leveler, lifting chains or slings for better loading at the its end, brake (chain stopper) is added to prevent load from lowering under a load. static top hook suspends block from a beam clamp or trolley is default and 360 degrees upper swivel hook withstanding weight of chain hoist itself plus weight it lifts attached and on the top of a hoist for easily mounting on the ceiling or trolley system is available, Of all these ensure safety and reliability
Then how chain block (also called manual chain hoist) work? mechanical advantage is used to transform small force to large force over long distance to short distance by using multiple larger and smaller gears which is in the block mechanism, cog and axle through lifting mechanism is turned after Hand chain is pulled down by a worker when lifting a load, load chain sprocket is turned by the drive shaft and gears which is driven by cog rotated by hand chain, Load chain looped over the sprocket is rotated to lift a load, Physics for lifting small and heavy object is very simple, lifting speed is slower than hydraulic hoist or electric hoist since it is driven by multiple Larger gears inside the lifting mechanism but not small gear yet increases the mechanical work and creates big force thus easily lift multiple ton loads by pulling hand chain dozen times, grab hook at the end of lifting chain for attaching and detaching a load easily, ratchet or braking system in lifting mechanisms prevents load from slipping back, but if pulls other side of hand chain, lowering a load is allowed, so lots of people call it ratchet chain hoist or double brake chain hoist/ friction brake chain hoist.
VK Chain blocks are widely applied in car service stations, shops, warehouses and construction sites where precise and accurate lifting is required, so what’s the advantage and disadvantage for them in comparison with other hoists for engine lifting? Advantages is that no oil, no electricity, no other additional resources is required to work, it is very simple to carry and use, cost for itself and cost for repairing is much lower than electric chain hoist, electric wire rope hoist, air hoist and hydraulic hoist; disadvantages of VK Chain blocks is they are slower than powered hoists, special installation areas is required thus limits places they are used, in opposite only a solid and level ground is required by hydraulic hoists.
They are kind of universal, manual hoist for lifting, tensioning appliance in any direction, which use a gear and pawl mechanical configuration to lift or release tension. VK Chain blocks feature compact design and robust, deep drawn and stamped steel construction.
If people apply too much force to the chain or overload, hand chain may come out of Hand chain wheel and chain got opened and will fell down to result possible injury. So please try to operate within the rated capacity and keep your grip loose on the pull chain that will ensure the chain and chain links stay in good condition, to let the chain blocks do good job for you but not let them injure you or chain fall down.
Specifications
Type | Capacity (t) | Standard Lift (m) | Effort required to lift full load (N) | Load Chain | Test Load (t) | Weight (kg) | Additional Weight per 1m Lift(kg) |
Diameter (mm) ×chain falls | |||||||
VK005 | 0.5 | 2.5 | 220 | 6 × 1 | 0.75 | 11 | 1.7 |
VK01 | 1 | 240 | 6 × 1 | 1.5 | 14 | 1.7 | |
VK02 | 2 | 360 | 8× 1 | 3 | 23 | 2.3 | |
VK03 | 3 | 3 | 380 | 10× 1 | 4.5 | 36 | 2.8 |
VK05 | 5 | 330 | 10 × 2 | 7.5 | 45 | 5.6 |
Dimensions (mm)
Type | Capacity (t) | A | B | C | D | H | |
VK005 | 0.5 | 138 | 114 | 21.5 | 140 | 255 | |
VK01 | 1 | 148 | 129.5 | 27 | 153 | 300 | |
VK02 | 2 | 183 | 143.5 | 30 | 190 | 352 | |
VK03 | 3 | 231 | 175 | 38 | 228 | 490 | |
VK05 | 5 | 231 | 175 | 47 | 228 | 510 |