REF what size snatch block for a 6 tons winch thank

[mendiplogs]

HI ALL I'm looking for a good snatch block it for a 6ton winch what size do i need it need to be a good one as i have large ash to pull out thanks all jon

[NI Tree]

you will need a 12 tonne one if you are runing the cable 360 degrees through pully so i would recomend 16 Single Sheave Snatch Blocks | Clark Forest : Lifting Chains

[slack ma girdle]

Get the biggest one you can get your grubby mits can get.

 

Don't forget that the load on the anchor has been doubled by going through the pully, so make sure the anchor point is backed up.

[mendiplogs]

Get the biggest one you can get your grubby mits can get.

 

Don't forget that the load on the anchor has been doubled by going through the pully, so make sure the anchor point is backed up.

 

HI slack and ni so a 12ton plus will do the on a single block or 2 blocks thanks jon

[NI Tree]

why would you want the biggest one you whant it to be best matched to the load so double the load is 12 tonne so 16 is the best matched and not to heavy to lift but with whinch wire to do not wount to bent it to tight so you wount a largish sheave

 

ps this is for one pulley

Edited January 31, 2012 by NI Tree

[mendiplogs]

why would you want the biggest one you whant it to be best matched to the load so double the load is 12 tonne so 16 is the best matched and not to heavy to lift but with whinch wire to do not wount to bent it to tight so you wount a largish sheave

 

ps this is for one pulley

 

HI NI thanks for that mate i will ring clacks ref a 16 ton thanks jon

[muldonach]

There are - or at least there appears to be - a couple of misconceptions in this thread which may be potentially dangerous.

 

The winch is stated to be 6t line pull, normal good practice would be to use a snatch block with a SWL (Safe Working Load) of not less than 12t however such a block will be large and heavy and is only really required in a lifting operation.

 

The unit offered by Clarke is listed as having an Ultimate Tensile Strength of 16t that does not mean it can or should be used at anywhere near that loading. Some factor of safety should be applied.

 

In reality however I would imagine that the winch in question is fitted with a wire of approx 12mm diameter? Such a wire will have an MBL (Minimum Break Load) of about 8.5-9.5t when new. Accordingly the snatch block should have at least that MBL - which in this case the Clarke unit does. In addition the 6tonne rating for the winch applies to first layer service only and falls away rapidly as the drum fills with wire.

 

It is (with apologies for advising on eggsucking) really important that the anchor point for the block is similarly stronger than the wire, in the event of a failure of the anchor point the block tends to land in the winch operators face

[mendiplogs]

There are - or at least there appears to be - a couple of misconceptions in this thread which may be potentially dangerous.

 

The winch is stated to be 6t line pull, normal good practice would be to use a snatch block with a SWL (Safe Working Load) of not less than 12t however such a block will be large and heavy and is only really required in a lifting operation.

 

The unit offered by Clarke is listed as having an Ultimate Tensile Strength of 16t that does not mean it can or should be used at anywhere near that loading. Some factor of safety should be applied.

 

In reality however I would imagine that the winch in question is fitted with a wire of approx 12mm diameter? Such a wire will have an MBL (Minimum Break Load) of about 8.5-9.5t when new. Accordingly the snatch block should have at least that MBL - which in this case the Clarke unit does. In addition the 6tonne rating for the winch applies to first layer service only and falls away rapidly as the drum fills with wire.

 

It is (with apologies for advising on eggsucking) really important that the anchor point for the block is similarly stronger than the wire, in the event of a failure of the anchor point the block tends to land in the winch operators face

HI mate yes your right its 12mm wire as new so what do you think of the size i need will a 15 ton will do thanks jon

[woody paul]

HI ALL I'm looking for a good snatch block it for a 6ton winch what size do i need it need to be a good one as i have large ash to pull out thanks all jon

 

Must be 1 hell of a tree

[mendiplogs]

Must be 1 hell of a tree

 

HI PAUL it way down in the wood a very large ash down a very high bank so i will cut it up small so less weight on the winch jon