Can I switch these servos? Different max torque servos

Other Hardware Motors, Mechanics, Power and CNC
1

So I have a question that needs to be answered as soon as possible.

I am building a hexapod that will weight around 3,5Kg-4 Kg (max).

This hexapod is based in a kit.

To build this robot you can either buy the frame only kit with no servos, or a kit that includes the hexapod frame and the 25 servos. The servos are the Hitec HS-645MG High Torque 2BB Metal Gear Servo, making this last kit unsurprisingly overpriced, since these motors are a bit expensive (making the price of motors only around 750€ (25 *31)

750€ calculated price for my country counting shipping as free.

Hitec HS-645MG High Torque 2BB Metal Gear Servo

FEATURES: Three metal gears.
Dual ball bearings.
Metal 1st Gear.
Four adjustable splined horns.
For use with .60 size helicopters, glow or electric cars and boats.

INCLUDES: One ultra torque servo with 11.5" connector wire.
One white small X-shaped servo horn.
One red Large X-shaped servo horn.
One white adjustable servo horn.
One white offset straight servo horn.
Four 2 x 14mm mounting screws
Four brass eyelets
Four black rubber vibration isolators.

SPECS: Speed: 0.24 sec/60° at 4.8V
0.20 sec/60° at 6.0V
Torque: 106.93 oz-in at 4.8V (7.7 kg-cm)
133.31 oz-in at 6.0V (9.6 kg-cm)
Length: 1.59" (40.6mm)
Width: 0.77" (19.8mm)
Height: 1.48" (37.8mm)
Weight: 2.11oz (60g)

1st Question - Would I be able to use other servos, like the one below? If not, which ones can I use?

MG995 Digital Metal Gear Servo

Power Supply: Through External Adapter.
Stable and Shock Proof
Connector Wire Length 300mm
Operating Speed : 0.17sec / 60 degrees (4.8V no load)
Operating Speed : 0.13sec / 60 degrees (6.0V no load)
Stall Torque : 9 kg-cm (180.5 oz-in) at 4.8V
Stall Torque : 12 kg-cm (208.3 oz-in) at 6V
Operation Voltage : 4.8 - 7.2Volts
Gear Type: All Metal Gears
Original box: NO
Color: Black
Item size: 40 * 19 * 43mm
Servo weight: 55g
Net weight: 66g (with accessories)

Thanks in advance (btw if you know of any cool hexapod robots, say so! I'm all ears).

Volkun

2

Volkun:
1st Question - Would I be able to use other servos, like the one below? If not, which ones can I use?

MG995 Digital Metal Gear Servo

What is your source for these servos? If it's ebay DON'T buy them. There are lots of fake servos on ebay.

I purchased some MG996R servos which turned out not to have ball bearings but they used bushings. These servos were junk.

I include a bill of material on the parts I used for my Halloween Hex. Make sure you follow the links to other places where I've documented the project. I need to fix a couple links since the new owners of Let's Make Robots (RobotShop) deleted all my posts from the site. The other links should still be good.

3

Well I wanted to make an a-pod from RobotShop :P. Starting with the hardware only kit and buying the motor servos here in my country (which is a pain, since prices are much higher then online of, so the source is not from ebay for sure.

And ofc buying the microcontroller and so on separately, since the hardware + servos kit is a ripoff.

4

DuaneDegn:
What is your source for these servos? If it's ebay DON'T buy them. There are lots of fake servos on ebay.

I purchased some MG996R servos which turned out not to have ball bearings but they used bushings. These servos were junk.

I include a bill of material on the parts I used for my Halloween Hex. Make sure you follow the links to other places where I've documented the project. I need to fix a couple links since the new owners of Let's Make Robots (RobotShop) deleted all my posts from the site. The other links should still be good.

Do you think its possible to make a 3 DOF Mandible head with an Actobotics Horizontal Standard Gripper Kit A from robotshop??

5

Volkun:
Do you think its possible to make a 3 DOF Mandible head with an Actobotics Horizontal Standard Gripper Kit A from robotshop??

I think that should be possible. There are lots of options to do something like this.

While I don't think ebay is a good place to buy servos, I think it's great for lots of other robot parts. If you use "robot claw" as your search terms, you'll see a bunch of options.