Using the Blueprint Hand Crank 5-Pack in Class

By Sphero Coding Robots & Kits | PK-12 STEM Education, AI | Published: 2026-10-26

Category: How-to Guides

Learn how to integrate the Blueprint Hand Crank 5-Pack into STEM classroom builds, with step-by-step assembly tips and activity ideas for hands-on learning.

Quick answer

Use the Blueprint Hand Crank 5-Pack to add manual power to your Blueprint builds, engaging students in mechanical design and problem-solving. Here’s how to assemble and use them effectively in class.

Why hand cranks are a valuable addition

Hand cranks introduce a tangible, mechanical element to robotics and engineering projects. They let students explore how rotational motion translates into movement, which is a core concept in STEM education.

Unlike motorized components, hand cranks are quiet, require no batteries, and give students direct control over speed and direction. This makes them ideal for focused design challenges and for testing mechanical advantage.

Trade-offs to consider

Hand cranks rely on manual effort, so they are not suitable for projects that require sustained, high-speed rotation or precise timing. They also add a moving part that can be a point of failure if not secured properly.

For classrooms with limited time, the assembly process might be a bit fiddly for younger students. Pre-assembling a few cranks or pairing students can help keep the pace moving.

Steps to assemble and use the hand crank

Gather materials: Collect the Blueprint Hand Crank 5-Pack, your Blueprint Build Kit or Class Pack, and the necessary 0.5x Pitch Shaft Collars. Check that all parts are present before starting. Missing shaft collars will make the crank unstable, so inventory all parts first.
Insert the shaft through the lock insert: Fit the crank's 50mm shaft through the lock insert on your build. Ensure it passes through smoothly and aligns with the intended rotation point. If the shaft doesn't slide easily, check for obstructions or misalignment—don't force it.
Secure with the shaft collar: Slide a 0.5x Pitch Shaft Collar onto the shaft and tighten it to lock the crank in place. This prevents slipping during operation. A loose collar will cause the crank to wobble; make sure it's snug but not overtightened.
Test rotation: Turn the crank manually to verify smooth rotation. Watch for any binding or resistance that could indicate a misalignment. If rotation is not smooth, recheck the collar tightness and shaft alignment.
Integrate into a build: Attach the crank to a gear, wheel, or other mechanism to drive motion. Encourage students to experiment with different gear ratios to see how force and speed change. This is a great moment to discuss mechanical advantage and design trade-offs.
Use in a classroom activity: Design a challenge where students must move an object or lift a weight using the crank. Have them document their process and results. Reflecting on what worked and what didn't reinforces the engineering design cycle.

Product facts

Blueprint Hand Crank 5-Pack: Each crank has a 50mm shaft and a 100mm circular movement, designed to fit through the lock insert and be secured with a 0.5x Pitch Shaft Collar. This ensures a stable, wobble-free rotation, which is crucial for consistent mechanical performance in student builds.
Blueprint Hand Crank 5-Pack