250 Sprocket and Pulley Spacer

Compliant wheels are not intended for moving robots, but moving objects. Compliant wheels give way to allow rigid objects to be manipulated easily. A line of multiple wheels on a driven hex shaft creates a very effective roller that ignores variations in the objects being driven. This makes for high-performance intakes and internal conveyors. The wheels are sized for an interference fit and tend to stay in place on a shaft, though a shaft collar may be used to make absolutely sure the wheels stay clear of other mechanisms or maintain consistent spacing.

The hex bore versions of this wheel are undersized, and are intended to be an interference fit on their respective hex shafts. This interference fit allows for effective torque transfer from the hex shaft to the wheel, as well as allowing the wheel to remain in place along the shaft without the need for spacers or collar clamps:

Different durometer ratings give each wheel unique characteristics. Green wheels (35A durometer) are the softest and most compliant around objects, while orange (40A), maroon (45A), and blue (50A) wheels are increasingly firm. The increased firmness also allows the latter wheels to carry a higher RPM rating. Check out the downloads tab for a chart showing wheels and their maximum RPM. 

Specifications

• Bore: 1/2 in. Hex, 3/8 in. Hex, Nub Bore
• Diameter: 2 in.
• Durometer: 35A (Green), ⠀40A (Orange), ⠀45A (Maroon), ⠀50A (Blue), 60A (Black)
• Hole Pattern: Qty 2 3.5 mm Holes on a 16 mm Circle for 8 mm bore wheels
• Material: TPU
• Maximum RPM: 6000 - 9000
• Weight: 0.035 lb.
• Width: 0.5 in.

Documents

Layout Print(s)

am-3571 2IN 375 Hex Compliant Wheel REV3.PDF

am-3462 2IN 500Hex Compliant Wheel REV3.PDF

am-3572 2IN 8mm Compliant Wheel REV4.PDF

CAD File(s)

am-3571 2IN 375Hex Compliant Wheel REV2.STEP

am-3572 2IN 8mm Compliant Wheel REV2.STEP

am-3462 2IN Molded 500Hex Compliant Wheel REV2.STEP

Additional File(s)

2 inch Compliant Wheel Expansion.pdf

Don't see what you need?

This is a Heavy Duty Hex Bearing which outperforms our previous 1/2" Hex Bearings as it has a Heavy Duty Inner Race. This FR8ZZ-HexHD bearing, 1/2" hex bore, flanged, heavy duty inner race, shielded ball bearing, has an inner race that is thicker and stronger than our recent offering of a similar bearing (am-0279). This bearing has more material between the corners of the hex bore and the edge of the race making it stronger and much less likely to crack under high load.

This bearing is guaranteed to have a stronger, thicker race. 100% of these bearings have been quality checked for a smooth fit over 1/2" hex stock here at AndyMark. Many of our long-time customers will recognize this bearing, as it is the same version we sold back in 2008-2011, and we did not have any failures. Now, it is renamed and quality checked for your high load needs - including drive chassis with cantilevered wheels.

Specifications:

• Inside diameter: 0.500-0.502 inch hex bore
• Outside diameter: 1.125 inch
• Flange thickness: 0.062 inch
• Overall thickness: 0.312 inch
• Weight: 0.05 pound

This Heavy Duty (HD) omni wheel is a vast improvement over our older 6" omni wheels and other wheels on the market. The body has been totally redesigned with durability and mobility in mind. The design intent is to provide a smooth roll along with the ability to handle impacts very well.

The body is made from black polycarbonate, while the rollers are each molded with a nylon core and TPU tread. These rollers spin smoothly on a captured dowel pin.

Specifications: 

• Diameter: 6 inches
• Width Across Middle: 2.0"
• Bore: 1.125 inch diameter x 0.36" deep with a 0.96" diameter thru hole
• Bolt Pattern: 6 holes (0.157in) on a 1.875 inch bolt circle
• Body Material: Black polycarbonate
• Load Capacity: 120 pounds
• Weight: 0.99 Pounds
• Number of Rollers: 10
• Roller Material, Outside: Gray TPU rubber
• Roller Durometer: 77A
• Roller Material, Inside: white nylon
• Roller Bearing Material: nylon spinning on steel
• Roller Axle: 1/8" diameter steel dowel pin
• Assembled and Repairable by installing or removing 10-24 screws

Included Hardware:

• One - Interior polycarbonate body piece
• Two - Outer polycarbonate body pieces
• Ten - Rolles
• Ten - Steel Dowel Pins
• Ten - Thread Forming Screws

Usage: 

With Axle and Hub:

• To drive this wheel with an axle and hub, pick any of the AndyMark hubs to this wheel. Hubs are NOT included in the price of the wheel. No bearings are needed when driving with an axle.

With Sprocket:

• To drive this wheel with a sprocket, the sprocket needs to be attached to the side of the wheel with screws, and two ball bearings are to be pressed into the wheel, one on each side.

With Bearings, as a Caster:

• Bearings can be pressed in to the 1-1/8" diameter pockets on each side of the wheel. This setup creates a nice caster.

3/8-16 x 4.75 inch long Hex Head Bolt

Specifications:

• Material: steel, with zinc plating
• Length: 4.75 inches under the head
• Thread: 3/8-16
• Hex width: 9/16 inch
• Weight: 0.15 pounds
• SAE Grade: 5

Churro is a versatile extruded aluminum hex profile. The outside of this part is a 1/2 in. hex with small concave dimples which act as weight savings. There is an inside hole is sized at 0.2 in. in order to fit 1/4-20 thread forming screws. No tapping or threading is needed, as long as a thread forming screw is used. The outside hex size fits a 1/2 in. wrench or socket. 

The 3-foot churro, our most popular length and the best value on shipping, is available anodized in red, blue, purple, gold and black to dress up your robot. Anodized finish is hardy and doesn't flake off or add thickness like paint, but it is possible for a scratch to expose the bare metal beneath. Take basic precautions in your shop like watching for sharp tools or overtightening this churro in a vise.

Specifications:

• Material: 6005A Aluminum
• Inside diameter: 0.231 in.
• Outside width: 0.495 in. Hex, across flats
• Length: Selectable Above
• Weight: 0.16 lbs/ft

This is an optional long steel output shaft for the Toughbox® series gearboxes. This shaft includes a pre-installed magnet designed specifically with the E4T OEM Miniature Optical Encoder (am-3132) and SRX Magnetic Encoder (am-3445) encoder in mind. This shaft has replaced am-0801.

Specifications:

• Material: 4140 Steel
• Size at large end: 0.500-.497" across hex flats
• Diameter of magnet: 0.249"
• Overall length: 7.08" (3.5" longer than the standard shaft)
• 1/4-20 tapped hole on the large end
• Weight: 0.366Lbs

These are all of our 9 mm wide 5 mm pitch HTD synchronous timing belt offerings. All of these belts are a composite of flexible rubber with a fiberglass tensile member throughout. Synchronous timing belts, also known as a toothed belt or synchronous belt, are designed to eliminate slippage and keep any number of objects rotating at a constant rate. We offer both genuine Gates brand belts as well as lower-cost generic brand belts. 

Current Belt Offerings

Parts are organized by the following scheme: (Tooth Count - Trade Number - AndyMark part number)

Gates Brand Belts

• 48T - 240-5M-09 - am-3274
• 60T - 300-5M-09 - am-4659

Generic Brand Belts

• 40T - 200-5M-09 - am-3272
• 45T - 225-5M-09 - am-3273
• 48T - 240-5M-09 - am-3662
• 70T - 350-5M-09 - am-4359
• 93T - 465-5M-09 - am-3378

Do you have a hard time finding some strong hex stock aluminum? We have it! This is 7075 series aluminum, which is great for use in transmission shafts.

Specifications:

• Material: 7075 Aluminum
• Width: 1/2" hex (0.496-0.499 inches)
• Weight: 0.27 pounds/ft
• Length: You specify, 1 foot, 3 feet or 6 foot in length, +/- 1"