Home > Gearboxes >

Sonic Shifter
Sonic Shifter Gearbox and Associated Parts
Alternative Views:

Price: $318.00

Usually Ships in 1 to 2 Business Days

Sonic Ratios*:

Shaft Type*:

Info Downloads More
Product Overview:
This two speed transmission gearbox provides speed and torque when necessary. Eight different gearing ratios and two shaft options are available for this top-of-the-line, robust gearbox. That's 16 different options! This shift-on-the-fly gearbox, uses a dog gear shifting method. Motor input accepts two CIM motors, or two AM Planetary Gearboxes or a combination of either (both not included). Two two shaft options are a round 1/2" 4140 steel shaft with a 1/8" keyway or 1/2" 7075 aluminum hex shaft.

The Sonic Shifter is no longer offered in the versions containing the 17 tooth cluster gear. We recommend looking at the EVO shifter if interested in a wider variety of gear ratio options.

Key Features:
  • The output shaft is centered on the gearbox.
  • CIM motor inputs centered on the gearbox.
  • The Sonic Shifter is lighter than the AM Shifter and Super Shifter designs.
  • Wider variety of gear ratio and shaft options available.
  • Will be shipped with an am-3132 encoder pre-installed.
Sonic Shifter Ratio Breakdown:
A color coded graphic accompanied by a ratio breakdown shows which gears are used where and what ratios they form for each sonic shifter.
Sonic Shifter Ratio Breakdown

Shift Style:
Two shifting methods are available for the Sonic Shifter. The pneumatic method is much stronger and faster than the servo method.
  • Pneumatic:
    • A pneumatic cylinder, Bimba model 04-0.5-DP, 3/4" bore x 1/2" stroke, (not included) shifts between high and low gear. This cylinder mounts with a 5/8-18 nut (not included). This is a strong, fast method of shifting, lasting under 0.5 seconds and pushing with 26 pounds of force (if using 60 psi). This pneumatic shift can be done while a robot is accelerating.
  • Servo:
    • A Servo Shifting hardware pack is available (am-2297), but not included with this product.
    • A Hi-Tech Servo, model HS-422HD is included in am-2297, using an actuation fork to shift between the 2 gear settings. This is a slow, weaker method of shifting (compared to pneumatic), taking 1.5-2 seconds and pushing with up to 8.5 pounds of force. A robot driver may need to back off of the throttle to let a servo shift gears while moving.
Motor Input:
Product Usage:
All AndyMark gearboxes require grease for proper operation and long life. We suggest using our red tacky grease, am-2768. We also encourage that the user powers the gearbox continuously for 30 minutes without grease to allow the gear teeth to wear in. While we do design with short run times in mind, this 'run in' period for smooth gearbox operation, is recommended. Once this is completed, thorough grease of the gear teeth periodically to ensure smooth operation.

Thanks to Evan from 2470 and Sean from 2489 for our new gearbox name, the "Sonic Shifter."

Average Customer Review: 3.5 of 5 Total Reviews: 4 Write your own review!

  0 of 0 people found the following review helpful:
Sonic Shifter Problems June 1, 2016
Reviewer: Chop Shop 166 from Merrimack, NH  
Team 166 used these transmissions this year. At our Week 6 competition in Lewiston, the 17t gear in the last gear reduction split in half at the keyway, as the wall thickness at the minor diameter of the gear is about 0.060". Many of the gears are keyed improperly, so that the corners of the keyway are at the minor diameter of the gear. We have destroyed three of the 17t gears this season. The gear in the right transmission broke in one of our last qualification matches in the Curie Division causing us to fall from 1st to 10th place, costing us the opportunity to create a powerful alliance. At the World Championship, I approached Andymark with our concerns regarding the 17t gear in particular, and I believe that is is unlikely that Andymark will do anything to improve the quality of this product. If you would like to see pictures of the broken gears, feel free to reach out to Chop Shop 166.

Email: 166.first@gmail.com
Twitter: @chopshop166

(AndyMark Reply 05/31/16: Thank you for this informative review.  We did talk to your team at the FIRST Championships, and we are sorry this part broke.   We are working on a solution for this problem, but it may change the final ratio of the shifter gearboxes.)

Was this review helpful to you?

  0 of 1 people found the following review helpful:
My team's story July 9, 2014
Reviewer: Kristen Okano  
My team wanted to order the set, but it was unavailable due to backorder. So we ordered one of the sonic shifter options along with some other items. The other items came in, but the shifters ended up on backorder. Everything turned out to be okay when they arrived except that we needed the shafts (which was a bummer because we really wanted to practice with the drive train to try out drivers and program and such). Our programming team wasn't as strong this year and had a difficult time adjusting to them. Our automatic shifting sounded like popcorn during a majority of our testing. This may have contributed to our main problem with them, the shafts continuously slip out of the gearbox. This prevents our encoders from functioning properly and compromises our shifting. We're not sure if this is due to misuse or product malfunction so we'd appreciate feedback from other teams who used the sonic shifters regarding this problem.

Was this review helpful to you?

  0 of 0 people found the following review helpful:
Good Overall with a Glaring issue January 18, 2014
Reviewer: Anonymous Person from Grosse Pointe Michigan  
Our Sonic Shifters arrived with the long aluminum hex shafts as an option to use in place of the one in the shifter. These shafts are not usable because the quarter inch diameter portion that goes into the encoder is too short to actually reach the encoder, also my team has heard of other teams twisting their aluminum hex shafts in competition so we have had to spend significant time manufacturing parts that should not have to be made in the first place. Other than that problem the shifters themselves seem to be fine

Was this review helpful to you?

  0 of 2 people found the following review helpful:
July 22, 2013
Reviewer: Ben Thorsgard from Northwood, ND United States  

Was this review helpful to you?

Browse products in the same categories:

Gearboxes > Two Speed Gearboxes
Browse ALL Products