I had a look at them last Thursday, when they went on sale. One crucial dimension wasn't specified. You need to know:
- diameter (obviously)
- bore diameter (you can sleeve 30mm down as you were wondering, as long as the clamping arrangement grips the blade properly)
- kerf width (should be 2.2mm)
- plate thickness
It's the last that isn't specified on the Parkside packaging. Also I *think* the ones I saw also seemed to be the wrong kerf width (2.4mm): As you know, they should be 2.2mm to fit the TS55 & Makita correctly (but it does say 2.2mm on the Lidl web site).
The plate thickness and kerf together give the offset distance between the surface of the driving arbour and where the teeth cut/scuff the rubber strip. You could have both wrong and the system would still work, but if one is wrong, the edge of the kerf won't line up.
I got some Axminster blades last year, as I couldn't otherwise find a rip blade for the Makita.
- 160mm diameter: check (should be 165 for Makita but 160 is OK);
- 20mm bore: check;
- 2.2mm kerf: check.
But the saw plate was a lot thinner than the proper blades so I ended up taking big chunks out of the rubber strip on the rail - I was not a happy bunny as I didn't have a spare strip handy.
Measure the plate thickness of your normal blade with digital verniers and check the Parkside ones. You may be lucky but I doubt it. The thicker plate reduces oscillations, which in turn gives a cleaner cut. A thinner plate is a good way of cost-reducing.
E.