Introduction: How to Make a Longer, High-Speed Ball Thrower

DIY High-Speed ball thrower is an improvised version of the Roboarm ball throwing aid, which is available in most of the Cricket playing nations.

This ball throwing aid is suitable for throwing different balls. Best for Cricket and Baseball batting/fielding drills. Because it's robust and apt for long-distance throwing, few people may prefer to use it as a dog ball thrower too.

Handheld ball throwing aids may not be the best substitutes but can be great alternatives for Cricket Bowling Machines or baseball Pitching Machines.


The RoboArm Ball throwers: 2
Get The RoboArms here:
Flathead screws (5mm): 2

Cutting Machine
Drilling Machine with drill bit size(5mm)

Step 1: Get RoboArm- 2 Nos

What Is the Roboarm Ball Thrower?

The Roboarm ball throwing aid is a widely used practice tool in Cricket circles. Most of the professional players and teams use the Roboarm in throwdown net practice sessions.

Its patented tiltable ball holding cup allows the coach/thrower to change the cup angle. One can set the cup angle suitable to his natural throw style. It requires less human effort to produce quicker deliveries.

Using the Roboarm, balls thrown up to 170kmph depends on the user's practice and effort. The Roboarm a fantastic tool for throwing fast deliveries, but one needs the training to throw the ball above 120kmph.

This DIY helps in making a faster ball throwing aid using less effort. Without practice, one can throw quicker balls. To build a high-speed Roboarm, we need two Roboarm ball throwers.

Get The RoboArms from RoboArm Official Site

Step 2: Cutting

a. Take one Roboarm ball thrower and cut it and remove the handgrip portion using the cutting machine at 5.4inches

b. Take the second Roboarm ball thrower and cut it and remove the neck portion at 3inches

Note: Cutting at high speeds may melt the plastic. Use a slower cutter.

Step 3: Drilling

Each Roboarm drilled at two places

Note: Drilling at high speeds may melt the plastic and weaken the product. Use the drilling machine at a lower speed.

Step 4: Finishing Up

Match the holes of the Roboarms.

Insert the screws and secure with tightening the bolts.

Fix one cup to the stem.

Step 5: Testing the High-Speed RoboArm

Check the high-speed ball thrower by throwing the balls. Adjust the ball holding cup number as required.

You should be able to throw the ball at higher speeds with very little effort.