I am sorry for disturbing you and maybe making you waste your time with a question that may seems ridiculous to you but I am no amateur nor a professional machinist. I am a bricolage amateur that needs help and has found this website and thinks is the best place to obtain the better advice.
My question is:
What mini electrical drill I must choose to make perfect -on both sides- spherical holes of very small diameter -1 to 5 mm, 0.03937" to 0.19685"- on soft and hard brass sheets of 0.2 and 0.3 mm - 0.00787" and 0.01181"
thickness?. The would be options being Proxxon FBS 240/E or Dremel 400 Digital models.
PROXXON MICROMOT FBS 240/E PRECISION DRILL/GRINDER.
For every conceivable operation: milling, drilling, grinding, polishing, brushing, cleaning, derusting, sawing, carving, engraving and much more.
The maximum speed of 20,000 rpm is continuously variable down to 5,000. The full wave electronic speed control results in virtually constant torque, even at lower speeds, great for micro drilling. The spindle runs in a precision ball bearing and is fitted with a lock button. The 20 mm collar fits MICROMOT drill stands and vices. Fitted with a quiet, high quality, specially balanced permanent magnet motor. The housing is of fibreglass-reinforced POLYAMIDE with comfort sections in the grip area. Supplied complete with 40 bits and cutters in a tough plastic case.
DREMEL 400 DIGITAL DRILL/GRINDER
This Dremel Kit is the premium offer in the range. The Dremel 400 Series Digital comes with 2 mini accessory cases, 80 accessories and 4 unique Dremel attachments in a spacious and highly convenient storage case. All together this kit offers the user maximum precision and control for many applications.
This execution is the supreme kit in the Dremel range, satisfying even the most demanding craftsman.
5,000 - 20,000 rpm. Maximum power consumption 100 W, 220 - 240 V. Length 200 mm. Weight 450 g. Insulated to class 2 requirements. Keyless chuck 0.3 - 3.2 mm
Features & Benefits
Slim housing design - Allows maximum control and excellent grip
Variable speed control 5.000 - 33.000 RPM - For exact speed adjustment in 1.000 RPM increments
LCD display - Shows exact speed settings
Separate on/off switch - Provides increased control by keeping speed setting after tool is switched off
140W motor - For maximum performance
Electronic feedback control - Enhances the torque and performance at low and mid range speeds
Soft start function - Improves the lifetime of the motor
Hang hook - For hanging the tool while working with the Flexible Shaft
Dremel 400 Series Digital
80 high quality Dremel accessories in 2 Mini Accessory Cases
High quality Flexible Shaft
Line and Circle Cutter
Cutting Guide Attachment
Lawn Mower Sharpening Attachment
Sturdy and spacious storage case
Inspiring Welcome Poster
Rated power input: 140 W
Voltage: 230 V
Weight: 0,59 kg
No load speed: 5.000 - 33.000 1/min
Some other questions: Which speeds are the best to drill holes on both soft and hard brass sheets of both 0.2 and 0.3 mm thickness. The price of the Proxxon in my Country -Spain, Europe- is 75 Euros, about 95 USD and the price of the Dremel is 115 Euros. Do you think the 100 Wats power and 5.000 to 20.000 rounds per minute of the Proxxon will be enough for the task? And Any other thing I should know before starting to work?
Looking forward to receive your replies.