SKU: 35140448336

Ummagawd Botgrinder Grinderino 3.5" Freestyle Frame Kit

Sale price$40.46 Regular price$44.95
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Ships within 48 hours · Estimated delivery Sep 11 - Sep 16

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Description

Ummagawd Botgrinder Grinderino 3.5" Freestyle Frame KitIntroducing the Grinderino. If you love your Demibot, but wish you had one that's juuuust a little smaller, your wishes have been granted! When Botgrinder asked if we can make him a 3. 5" frame, he said he wants something just as good as the Demibot but in a smaller package. It took a bit of adjustment, but I think we hit the mark. As for flight controllers, this frame will fit a single board whoop style AIO, or a 20 x 20 stack. The rear of the frame

Introducing the Grinderino.

If you love your Demibot, but wish you had one that's juuuust a little smaller, your wishes have been granted!

When Botgrinder asked if we can make him a 3.5" frame, he said he wants something just as good as the Demibot but in a smaller package. It took a bit of adjustment, but I think we hit the mark. As for flight controllers, this frame will fit a single board whoop style AIO, or a 20 x 20 stack. The rear of the frame provides plenty of space to fit a VTX of your choice, and just the same, the front will accommodate any camera. We've provided motor mounting holes to fit our Ummagawd Aerolite 1605 3600kv motors, as well as a standard mounting pattern for any other motors you might like to run.

And if you were curious... Yes, this is less than 250g all up weight!

UPDATE: The Grinderino arms are now compatible with 9x9mm motor mounting!

You can find all the related parts in the Botgrinder Grinderino 3.5" Frame & Parts Collection.

Also check out all our 3"/3.5" Frames and the rest of our Ummagawd Products!

Specifications:

  • Arms: 4mm
  • Top Plate: 2mm
  • Bottom Plate: 2mm
  • Mid Plate: 2mm
  • Standoffs: 6mm OD 7075 Aluminum
  • FC Mounting: 20x20 and 25.5x25.5 (whoop style)
  • VTX Mounting: 20x20 and 25.5x25.5 (whoop style)
  • Frame Weight: 65g
  • Motor Mounting Pattern: 12mm x 12mm and 9mm x 9mm

Package Includes:

  • 1 x Top Plate
  • 4 x Arms
  • 1 x  Bottom Plate
  • 1 x Mid Plate (with press nuts)
  • 1 x Hardware Kit
  • 1 x Ummagrip Battery Pad
  • 2 x Battery Straps
  • 1 x Set of TPU FPV Camera Mounts

Downloads:

Grinderino Assembly Guide

 

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    Exchange/Return Notes
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    SKU: 35140448336

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    4.6 ★★★★★
    Based on 14 reviews
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    Today
    Boise, US
    ★★★★★ 5
    Airedale tough!
    Color: Rubber Chew Toy, Size: Large
    We have two young Airedale Terriers and I thought this would be a good inside toy for them to tug. And I was right! Very happily so. I have to admit I was surprised when I first saw it; it seemed so small. But the thing stretches and springs back to shape. We’ve had it about 2 weeks now and it is constantly played with. Absolutely the best toy! Very interactive either alone (it rolls) or with us or they play together. I am surprised how tough it is with all the constant rough play. Highly recommend!!!
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on May 12, 2022
    J
    Verified Purchase
    Julie
    West Palm Beach, US
    ★★★★★ 4
    Small, but twisty and fun looking. Seems relatively sturdy, though doesn't look indestructible at all.
    Color: Rubber Chew Toy, Size: Large
    SLIGHTLY disappointed because I thought this was bigger than it is. If you squish it all in close, it's maybe one and a half times the size of a tennis ball. (Of course, the size is probably listed; I think I just assumed, so my fault.) That being said, it's entertainingly twisty and squishy, though the rubber seems relatively sturdy. I'm not yet positive if it will hold up to the 8 month retriever/lab mix it's intended for; he tends to rip instantly through anything much less sturdy than kong natural rubber. But it seems like something that will amuse him, so we're going to give it a shot at Christmas.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on November 7, 2014
    K
    Verified Purchase
    Kindle Customer
    Pawtucket, US
    ★★★★★ 5
    Great product!
    Color: Rubber Chew Toy, Size: Large
    My dog is an aggressive chewer. I have bought this 3 times for her she loves to play tug and fetch with it. They last longer than most of the other toys I get her and it’s one of her favorites.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on January 1, 2025
    K
    Verified Purchase
    Kate
    Lowell, US
    ★★★★★ 3
    It’s okay I guess
    Color: Rubber Chew Toy, Size: Large
    Good price and decent toy, seems well made. My puppy is entirely uninterested and doesn’t play with it at all.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on April 23, 2026
    P
    Verified Purchase
    PattyJoyce on Joe List
    Natrona Heights, US
    ★★★★★ 1
    Very dangerous for chewers!!!
    Color: Rubber Chew Toy, Size: Large
    My dog was chewing/swallowing the hard rubber within seconds of having this "toy"!!! Not safe, sturdy, no play attraction; only desire was to consume!!!
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on March 16, 2026

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