Anything that Arc sell will be a quality product. The 4" Chinese chuck that they sell can be bought more cheaply on Ebay, but the quality is going to be poorer than the Arc version. Chinese companies sell the same product in different qualities, depending on what the buying company wants to pay and what quality they want.

Arc has an exemplary reputation for excellent goods at reasonable prices. You can depend on the quality of their Chinese chucks. If in the highly unlikely event of a problem, you can depend on them to rectify it PDQ.

Andrew.

Have a look on the https://www.chronos.ltd.uk/ site here Soba Chronos Product Code: 145056

and also Chronos Product Code: K11100M . The Soba is probably the better of the two.

John

If you buy, cheap off E bay, you will not be sure of the quality, nor, if there is a problem will you get any help.

You get what you pay for!

If you buy from Arc, you will get sound advice, and help if there is any problem, or query.

Do not be tempted to fit an oversized chuck. Too heavy a chuck will cause extra wear to the bearings,

If you can find a chuck with a backplate to suit a Myford 7 Series, well and good. Otherwise you will need to do some machining.

You can buy a backplate to suit a Myford thread and register, but you will need to turn the OD to match the register in the chuck, drill the holes for the retaining screws (Which in all probability will be Metric ) and skim the face to ensure that it is square to the axis of your lathe.

This might be the more accurate way to do things, but the register diameter needs to be a close fit in the chuck, so don't rush things. Measure twice, cut once!..

Howard