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Description
1133 640 7100 – STIHL Worm Gear (Genuine OEM Part)
The STIHL 1133 640 7100 is a genuine OEM worm gear, designed to drive the oil pump in compatible STIHL chainsaws. This component plays a critical role in the chain lubrication system, transferring rotational motion from the clutch assembly to the oil pump to ensure continuous bar and chain lubrication during operation.
Manufactured to STIHL’s original equipment specifications, this worm gear is engineered for precise engagement, smooth rotation, and long service life under constant load. Using a genuine STIHL worm gear ensures correct oil pump drive, reliable lubrication performance, and factory-approved fitment.
Product Details
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Manufacturer Part Number: 1133 640 7100
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Brand: STIHL
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Part Type: Worm Gear
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System: Oil pump / clutch drive system
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Function: Drives oil pump from clutch rotation
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Material: High-strength engineered polymer
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OEM Status: Genuine STIHL OEM replacement
Function
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Transfers motion from the clutch to the oil pump
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Ensures consistent bar and chain lubrication
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Supports proper chain cooling and wear reduction
Compatible With STIHL Chainsaws
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MS 280 C-BQ (Oil pump, Clutch)
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MS 271 Farm Boss (Oil pump, Clutch)
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MS 291 C-BEQ (Oil pump, Clutch)
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MS 271 (Oil pump, Clutch)
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MS 291 (Oil pump, Clutch)
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MS 280 (Oil pump, Clutch)
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MS 270 (Oil pump, Clutch)
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MS 270 C-B (Oil pump, Clutch)
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MS 270 C-BQ (Oil pump, Clutch)
How It’s Used
This worm gear installs behind the clutch drum and meshes with the oil pump drive. As the clutch rotates, the worm gear turns the oil pump, supplying bar oil to the guide bar and chain during cutting.
Correct installation and alignment are essential for maintaining consistent lubrication and preventing premature chain or bar wear.
Suggested Maintenance
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Inspect the worm gear during clutch or oil pump service
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Check for worn or stripped gear teeth
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Clean sawdust and debris from the clutch area regularly
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Replace the worm gear if oil delivery becomes weak or stops
The STIHL 1133 640 7100 Worm Gear is used in OEM-specified lubrication systems where reliable oil pump drive, durability, and consistent chain lubrication are essential.
