ETS sanding stroke?

[Lucky Dave]

ETS 125 Sanding stoke =2, 150 = 3 or 5

Please help me understand what these numbers mean in actual use.  Are we talking 5% difference? 25%, 50%?

Would a 150 3 with say 200 grit abrasive = a 150 5 with 220 grit?  Does that question even make sense?

I have a RO 125 and am looking for a second sander. Trying to decide which ETS I should get.

 

[Administrator_JSVN]

Dave,

The ETS 150/3 has a 3mm stroke and the ETS 150/5 has a 5mm stroke. The tighter stroke is for fine to superfine sanding and the larger stroke is for intermediate to fine sanding. The larger the stroke, the faster the feed rate and rate of material removal; the opposite is true for the smaller stroke. Basically, if you want to cover more area in less time, choose the ETS 150/5. If a super fine finish is desired, choose the ETS 150/3.

The same principles would apply to the ETS 125 with a 2mm stroke.

So, basically, the larger the stroke, the faster the sander does it's job. The grit is the grit, regardless of stroke. However, grit can also play a factor in the rate of material removal, but it's true purpose is the resulting depth of the scratches in the material.

Shane

 

[mouppe]

You would be best off with the ETS 125's 2mm stroke. Then you could also use 5" paper for both sanders. Also, the Ro 125 has a 3.6mm stroke which is very close to the ETS 150/3's 3mm stroke. You would not perceive a difference since the Rotex has a random orbit mode, although you would cover more surface area faster.