What is the difference between this and the ROS20VSK version? Just the carrying bag? Does the 'K' version have anything this one does not?

Thank you for your question. The ROS20VS is the same sander in both kits. The difference is the ROS20VCS will have a soft canvas carrying bag and the ROS20VSCK will include a hard carrying case. If you have further questions please feel free to contact our Bosch Customer Service Representatives at 1-877-BOSCH-99 (1-877-267-2499)

will the dust collection connection on the sander body accept a vacuum hose?

There is an adapter (part # VAC002) that will adapt the sander to standard vacuum hose sizes (1-1/4" & 1-1/2" hoses).

My new ros20vsc, set at 6, slows noticeably if i just set it on a suface to sand. is this normal?

Thank you for your question. The ROS20VSC Orbit sander normally has a slow start, however, if it is for the whole time you are using the tool with the speed of 6, we might need to evaluate it. Kindly contact us at 1-877-BOSCH99 (1-877-267-2499) from Mon-Fri 7A-7P CST.

Is 1/16" cupping in the disc normal?

I would say that a small amout of "cupping" is normal. As to 1/16 of an inch, I think that is a little much. Most of the sanding takes place on the outer edge of the disc. As it rotates the dust is sucked into the 8 holes in the center of the disc. In order to flatten out the disc, you would have to put more pressure than normal. My experience with this brand of random orbit sander is that the more pressure you put on the sander, the slower the disc turns. You need to have at least a moderate rate of rotation to keep putting new cutting surfaces forward and to get a decent "scrambling" of sanding marks.If your sander is older, you may want to purchase a new disc. They are relatively inexpensive. If the sander is newer you may want to see if the dealer or manufacturer will replace the disc.

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Description

⚡ Sand Smarter, Finish Flawlessly – Own the Workspace

MESS FREE MASTERY - Twist-off dust canister with microfilter traps particles as tiny as 0.5 microns—keep your workspace pristine.
EFFORTLESS DISC CHANGES - Bosch’s signature hook-and-loop system with 35,000+ hooks ensures quick, secure sanding pad swaps.
FLAWLESS FINISH EVERY TIME - Pad dampening system eliminates swirl marks on any surface, flat or contoured.
READY TO GO WHEREVER YOU WORK - Includes soft carrying bag and vacuum adapter for ultimate portability and clean-up convenience.
SPEED THAT MATCHES YOUR HUSTLE - Variable speed dial lets you dial in precision from 7,500 to 12,000 OPM for every task.

The Bosch ROS20VSC is a compact, 2.5 Amp corded palm sander featuring a 5-inch random orbital pad with variable speed control (7,500-12,000 OPM). Designed for professionals seeking precision, it includes a swirl-free pad dampening system, a high-efficiency microfilter dust collector capturing particles down to 0.5 microns, and a durable hook-and-loop disc attachment for quick sanding pad changes. The kit comes complete with a vacuum adapter and soft carrying bag, making it the perfect tool for clean, efficient sanding on the go.

Specifications

Brand	BOSCH
Product Dimensions	9"L x 5"W x 6"H
Grit Type	Fine
Voltage	120 Volts
Power Source	Corded Electric
AC Adapter Current	2.5 Amps
Grit Number	80
Maximum Rotational Speed	12000 RPM
Item Weight	3.5 Pounds
Disc Diameter	5 inches
UPC	000346437522
Global Trade Identification Number	00000346437522
Manufacturer	Bosch
Part Number	ROS20VSC
Item Weight	3.5 pounds
Item model number	ROS20VSC
Is Discontinued By Manufacturer	No
Size	No Size
Color	Blue
Style	Sander with Soft Carrying Bag
Material	Plastic
Item Package Quantity	1
Number of Handles	1
Special Features	compact
Included Components	(1) Soft Backing Pad, (1) Sanding Disc, (1) Vacuum Hose Adapter, (1) Contractor Bag
Batteries Included?	No
Batteries Required?	Yes
Warranty Description	30 day money back guarentee, 1 year manufactuer warranty

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