Solid Steel Idler Sprocket, #40 Chain 17T 5/8"Bore

Idler Sprocket, 4017 X 5/8"

The 20401710 Idler Sprocket (4017 X 5/8") is a roller chain idler sprocket designed for guiding or tensioning chain runs where smooth engagement and reliable alignment matter. The sprocket series and sizing are determined by chain size and tooth count, and Weasler offers options across 35, 40, 50, 60, and 80 chain sizes, including roller chain idlers and agriculture idler series—because chain systems are happiest when everything matches (and grumpiest when it doesn’t).

Country of Origin
Varies by production batch

Key Features / Specifications

• Model / Part Number: 20401710
• Brand: Weasler
• Product Type: Idler sprocket
• Series / Description: 4017
• Bore: 5/8"
• Length: 0.65 in (17 mm)
• Width: 0.65 in (17 mm)
• Outside Diameter: 2.97 in (75 mm)
• Shipping Dimensions: 0.65" L × 2.975" H × 0.65" W (2 cm L × 8 cm H × 2 cm W)
• Shipping Volume: 1.26 in³ (21 cm³)
• Weight: 0.42 lb (0 kg)
• Shipping Weight: 0.42 lb (0 kg)
• Series Notes: Sprocket series/size determined by chain size and number of teeth; available in 35, 40, 50, 60, and 80 chain sizes (including roller chain idler sprockets and agriculture idler chain series)

Ideal For

• Chain drive setups needing a compact idler sprocket with a 5/8" bore
• Guiding or tensioning chain runs to reduce derailment and uneven wear
• Replacing worn idlers to restore smoother operation and better chain alignment
• Agricultural and industrial applications using Weasler-compatible idler sprockets
• Anyone who’d rather hear their equipment run smoothly than “sing the song of misaligned chain”