ThunderHex Stock & Accessories
ThunderHex Stock & Bearings will revolutionize the ways teams use hex shaft.
ThunderHex Stock works in all applications where 3/8" or 1/2" Hex Shaft will work and also includes rounded corners. These rounded corners allow the shaft to pilot inside a 10.25 or 13.75 mm round (ThunderHex) Bearing instead of a standard 1/2" Hex Bearing. This eliminates some difficult manufacturing tolerances and results in a MUCH smoother end result. Simply put, ThunderHex Bearings are the best way to create smooth-running hex shafts, and ThunderHex Stock helps you accomplish this without a lathe.
Also, since you're essentially putting a round peg in a round hole, no more struggling to align the hex of your shaft with the hex hole of your bearing.
All ThunderHex Stock also includes a subtle but very useful feature: a 0.201" hole through the center. This hole provides a clearance fit for a #10 bolt or can be tapped for 1/4-20 bolts. This means that you no longer need a precision lathe to create custom-length, high-strength standoffs; simply cut the ThunderHex shaft to size and tap it with a 1/4-20 (or 1/4-28) thread.
Note: Due to a manufacturing variance, our current inventory is slightly out of tolerance. The diameter of our 18" ThunderHex Stock is oversized by (on average) 0.0003". This results in a press-fit into ThunderHex round bearings. Users who need a looser fit should gently sand the rounded corners of the hex.
Example Shaft Modifications
Combine 1/2" Hex Stock, ThunderHex Bearings, 1/2" Hex Bearings, and 1/2" Round Bearings to create a multi-step shaft using only simple machining techniques! Reduce shaft retainers or spacers in your design by creatively integrating bearing shoulders into your designs.


217-5837:
(1) 3/8" ThunderHex Stock (36")
217-4002:
(1) 1/2" ThunderHex Stock (18")
217-4017:
(1) 1/2" ThunderHex Stock (3")
217-7345
(10) 10.25mm (3/8 ThunderHex) ID x 0.625" OD x 0.313" WD (Plastic Flanged Bushing)
217-7346
(6) 10.25mm (3/8' ThunderHex) ID x 0.625' OD x 0.313' WD (Bronze Flanged Bushing)
217-7347
(10) 13.75mm (1/2" ThunderHex) ID x 0.625" OD x 0.313" WD (Plastic Flanged Bushing)
217-7348
(6)13.75mm (1/2" ThunderHex) ID x 0.625" OD x 0.313" WD (Bronze Flanged Bushing)
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ThunderHex Drawings
All ThunderHex Bearings
All Flanged Hex Bearings
All Flanged Round Bearings
All Radial Bearings
217-4270 (13.75mm (1/2" ThunderHex) ID x 1.125" OD x 0.313" WD (Radial Bearing)
3/8" ThunderHex Bushings
1/2" ThunderHex Bushings
ThunderHex Stock
7075 T6 Aluminum
Bushings
217-7345 / 217-7347
Acetal
217-7346 / 217-7348
Oil Impregnated Bronze
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Black Anodized
ThunderHex Stock
217-4002 (1/2" ThunderHex Stock 18") - 0.3 lb
217-5837 (3/8" Hex x .165" ID ThunderHex Stock 36") - .40 lb
217-4017 (1/2" ThunderHex Stock 36") - 0.666 lb
"Thunder" Bearings
(217-5830) .302" (1/4" ThunderSquare) ID x 0.875" OD x 0.280" WD (Flanged Bearing) : 0.04 lb
(217-5829) 10.25mm (3/8" ThunderHex) ID x 0.875" OD x 0.280" WD (Flanged Bearing) : 0.04 lb
(217-4006) 13.75mm (1/2" ThunderHex ID) x 1.125" OD x 0.313" WD (Flanged Bearing) : 0.05 lb
(217-4270) 13.75mm (1/2" ThunderHex) ID x 1.125" OD x 0.313" WD (Radial Bearing) : 0.048 lb
ThunderHex Bushings
0.004lbs each
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CAD
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10.25mm (3/8" ThunderHex) ID x 0.62" OD x 0.313" WD (Plastic Flanged Bushing) (217-7345)
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13.75mm (1/2" ThunderHex) ID x 0.625" OD x 0.313" WD (Plastic Flanged Bushing) (217-7347)
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13.75mm (1/2" ThunderHex) ID x 0.625" OD x 0.313" WD (Bronze Flanged Bushing) (217-7348)
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10.25mm (3/8" ThunderHex) ID x 0.625" OD x 0.313" WD (Bronze Flanged Bushing) (217-7346)
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"Thunder" Bearings
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.302" (1/4" ThunderSquare) ID x 0.875" OD x 0.280" WD (Flanged Bearing) (217-5830)
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13.75mm (1/2" ThunderHex ID) x 1.125" OD x 0.313" WD (Flanged Bearing) (217-4006)
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10.25mm (3/8" ThunderHex) ID x 0.875" OD x 0.280" WD (Flanged Bearing) (217-5829)
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13.75mm (1/2" ThunderHex ID) x 1.125" OD x 0.313" WD (Radial Bearing) (217-4270)
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ThunderHex Stock
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3/8" Hex x .165" ID ThunderHex Stock (36") (217-5837)
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1/2" Hex x 0.201" ID ThunderHex Stock (36") (217-4017)
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1/2" Hex x 0.201" ID ThunderHex Stock (18") (217-4002)
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