Product Comparison: Dremel 7700-1/15 vs Dremel 8220-1/28

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General Specifications
About the Product
Ready to go on a minute's notice, this two-speed cordless rotary tool is perfect for a variety of do-it-yourself jobs inside or out. From shaping and trimming to cutting materials, the Dremel 7700 can easily tackle jobs that other cordless rotary tools can't. Plus, with its interchangeable battery pack, you can work continuously without waiting for a charge.
The Dremel 8220 variable-speed cordless rotary tool kit offers the highest performance and versatility of all Dremel cordless rotary tools. The strength of its motor facilitates maximum performance at all speed levels. In fact, with its 12VMAX lithium-ion battery technology, the Dremel 8220 has a 33% longer run-time than the Dremel 8200 cordless rotary tool when cutting screws.
Key Specs
Accessory Change System
EZ Twist Nose Cap
Min. No Load Speed
10000 rpm
5000 rpm
Max. No Load Speed
20000 rpm
35000 rpm
What customers say about "Key Specs"
Dremel 7700-1/15 Cordless Rotary Tool Kit
  • This new model is exceptionally quite and can do both dogs nails in minutes. I can run this model on low speed and still cut through nails with ease.
  • Has high and low speed which is also a plus. The slower speed can be used for softer nails and in the early stages of training them to let you grind the nails.
  • The 2 speeds are nice since he lets me do his back feet no problem, I use low speed there and take my time shortening and shaping.
  • The highest speed is probably between low and medium on a corded one however it is perfect for their nails.
  • The Hi and Lo never worked correctly. Now seems to be only one speed and sometimes it will stop or start on its own because the battery doesn't seem to fit tight enough..
Dremel 8220-1/28 Cordless Rotary Tool
  • Separate power and variable speed switch. Variable from 5-30k.
  • EZ twist collet lock (no need to carry around wrench).
  • It has low level variable speeds which are very nice for especially slow and deliberate work.
  • I like this unit for the power/speed, which is fully adjustable via a slider switch.
  • I use this at work to grind dog's nails. I am able to set the speed where I need it and then turn the tool on/off at the separate switch. This is a huge time saver!
Size & Weight
6.5 in.
6 in.
3.3 in.
3 in.
3.3 in.
2 in.
1.5 lbs.
3.53 lbs.
What customers say about "Size & Weight"
Dremel 7700-1/15 Cordless Rotary Tool Kit
  • Extremely easy to use, light-weight, and feels comfortable to hold for extended periods of time.
  • Light weight, easy to control, reasonable run-time on charge. bits are easy to exchange, has just enough power to be used briefly on larger jobs.
  • It is nicely light weight and easy to manage.
  • The weight is well balanced in your hand.
  • Solid light weight tool. You are going to cut or grind hard metal but works well on wood.
Dremel 8220-1/28 Cordless Rotary Tool
  • Portable, enough power, light weight for hobbies and small fix it jobs.
  • Nice product, moderate weight in your hand.
  • Nice compact tool kit! Easy to handle and work with it.
Speed Power Selection
Accessories Included
Heavy Duty Emery Cut-Off Wheel, 1-1/4-Inch Cut-Off Wheel, 1/8-inch High Speed Cutter, 5/8-inch Aluminum Oxide Grinding Stone, Silicon carbide grinding stone, 2x Aluminum Oxide Grinding Stone, Bristle Brush, Felt Wheel, Polishing compound, 1/2-inch Drum Sander, 1/2-inch 60 Grit Sanding Band, 1/4-inch Sanding Drum, 2x Mandrels, Lawn Mower and Garden Tool Sharpener
Multipurpose cutting bit, 1/4-inch Fiberglass-Reinforced Cut-Off Wheel, Aluminum Oxide Grinding Wheel, 5/8-inch Aluminum Oxide Grinding Stone, 4x Felt Polishing Wheel, 4x Emery Polishing Wheel, Polishing compound, 4x 1-inch Felt Polishing Wheel, Coarse 1/2-inch Sanding Drum, 2x 1/2-inch 60 Grit Sanding Band, 3x 1/2-inch 120 Grit Sanding Band, 3x 1/2-inch 240 Grit Sanding Band, 2x Mandrel
Two speeds 10,000 and 20,000 rpm to match the proper speed required, Removable battery pack lets you use additional packs for continuous use, 3-hour charger with LED light shows proper charging, Compact and lightweight for easier handling and less fatigue
Separate on/off switch and speed control retains speed setting for the perfect speed every time, EZ Twist™ nose cap with wrench for fast accessory changes, Cool-running ball bearing construction for smooth and quiet operation, Comfort grip housing for easier handling and better control
2.4 - 5.4 m/s²
What customers say about "Features"
Dremel 7700-1/15 Cordless Rotary Tool Kit
  • This Dremel works very well. I hadn't used a Dremel before. It took me a bit to figure out how to get the bit I needed attached as its a little different than a basic drill, but it all worked out.
  • Great little tool (comes with quite a number of attachments "in the box"), and furthermore, additional types of tools are available, both on Amazon and down at the local home improvement store.
  • I love that this tool came with so many other attachments and that I'll be able to use the Dremel for other projects. I highly recommend this!
  • You have every possible tip and attachment you could ever need. This is really a fine tool.
  • The resistance behind the speed selector lever is so unbalanced that it hardly ever works to operate it with one finger.
Dremel 8220-1/28 Cordless Rotary Tool
  • Takes all of the dremel attachments unlike some of the smaller models.
  • Handy case that stores the 8220 and many more accessories.
  • Quick release collar is new and great feature, no more wrench to chase down.
  • One of the best feature is that it fits all my Dremel accessories.
  • The only bad point is the carrying case: I wish the case were a bit more flexible in allowing more accessories to be stored with it.
Power Source
Battery Type
7.2V Nickel-Cadmium (NiCd)
12V/1.5Ah Lithium Ion
What customers say about "Power"
Dremel 7700-1/15 Cordless Rotary Tool Kit
  • The battery on this didn't last nearly as long as I was hoping--- only about 30min, and I'd say not even half of that was at high speed.
  • Good to have the cordless feature and makes it versatile for small jobs around the house
  • Pretty weak on the power. However, to be expected from battery powered tool. The cordless feature is super convenient though.
  • We purchased this due to the cordless feature. This Dremel is wonderful we just wish it included more cutting wheels.
  • It's a dremel - what more can I say - the cordless feature is very convenient
Dremel 8220-1/28 Cordless Rotary Tool
  • Plenty of torque and speed for grinding large dog nails. Don't waste your money on the cheaper lover voltage ones that bog down under the slightest load.
  • 12 volt separate battery and charger incase you want to have additional batteries. It is a quick charging battery taking about 1 hour.
  • Best feature is the removable battery. I can always have one on charge while I'm using it.
  • The battery holds a charge for a long time, and is fast charging.
  • I wonder if I got a dud for a battery. I can only do about 20 minutes on a medium speed before the battery dies. I am not impressed.
Warranty / Certifications
Manufacturer Warranty
2 year(s)
2 year(s)
Other Information

Price History

Other reviews