FingerTech 30T S3M Timing Pulley for F4006 Motor
Upgrade your FingerTech F4006 brushless setup with this purpose-built 30T S3M timing pulley. Precision-machined 6061-T6 (anodized red) with steel flanges, it delivers smooth, no-slip power with 4mm-wide S3M belts and a 4mm bore. Four M3 mounting holes (12mm BCD) secure it to the F4006 rotor. At just 13.8g, it’s an ideal race-day replacement, spare, or foundation for custom weapon drives.
$7.75
7 in stock (can be backordered)
What it is / Who it’s for
The FingerTech 30T S3M timing pulley is built for combat-robotics teams who want reliable, no-slip belt drives. Designed to mount directly to the F4006 740KV brushless outrunner, it helps you deliver controlled, efficient power to weapons or drivetrains without adding unnecessary mass.
How it works
Precision-machined from anodized 6061-T6 aluminum, the pulley meshes with 4 mm-wide S3M (3 mm-pitch) timing belts for smooth, positive engagement. The lightweight body reduces rotating inertia while the steel flanges keep the belt centered under shock and side load.
What’s included / What you’ll need
Pulley with steel flanges and a 4 mm bore; the rotor face mounts via 4× M3 on a 12 mm bolt circle (F4006 pattern). You’ll need a matching 4 mm-wide S3M belt and appropriate M3 hardware for your stack-up.
Why this pulley
It balances strength, weight, and accuracy—only 13.8 g while standing up to repeated hits. Ideal for beetleweight weapons and compact custom builds where every gram counts but durability still matters.
Safety & best practices
Before power-up, verify pulley and motor alignment, belt tracking, and tension. Keep debris out of the belt path; foreign material can cause slip or premature wear in match conditions.
Learn more / Guides
Build a proven weapon drive by pairing this pulley with the FingerTech F4006 motor and 4 mm S3M belts. Need a different mounting style? Compare the 30T S3M no-hub pulley for alternate setups.
Features
- Precision-machined 6061-T6 aluminum (anodized red) with steel flanges for strength and durability.
- S3M, 30-tooth profile (3.00mm pitch) for smooth, positive, slip-free belt engagement.
- Fits 0.157in (4.00mm)-wide S3M timing belts commonly used in combat robots.
- Lightweight at 0.49oz (13.8g) to reduce rotating inertia without sacrificing stiffness.
- Four-hole mounting: 4×M3 on a 0.472in (12.00mm) bolt circle for reliable attachment to the F4006 rotor.
- Compact package: 32mm flange OD and 7.30mm overall pulley width help with tight layouts.
- Proven in beetleweight (3lb) drive or weapon systems.
- Plays nicely with FingerTech’s S3M ecosystem (belts, pulleys, and hardware).
Maintenance
- Routine checks: Inspect pulley teeth regularly for wear or damage. Check belt tension before each match to prevent slippage.
- Replacement parts: Keep spare 4 mm S3M belts and at least one extra pulley on hand—belts can wear faster under combat loads.
- Safety & best practices: Verify the 4 × M3 mounting screws stay tight; reapply medium-strength threadlocker as needed. Keep debris out of the pulley to prevent belt skipping.
Specifications
| SPEC | DETAILS |
|---|---|
| Tooth profile | S3M, 0.118in (3.00mm) pitch |
| Tooth count | 30 teeth |
| Material / finish | 6061-T6 aluminum (anodized red); steel flanges |
| Bore | 0.157in (4.00mm) |
| Belt width (usable) | 0.157in (4.00mm) |
| Pulley width (overall) | 0.287in (7.30mm) |
| Flange OD | 1.26in (32.0mm) |
| Weight | 0.49oz (13.8g) |
| Mounting to motor | 4×M3 holes on 0.472in (12.00mm) bolt circle — fits FingerTech F4006 rotor |
| Compatibility | F4006 740KV brushless outrunner; 4mm S3M Fingertech timing belts |
FAQs
Will this pulley fit other motors besides the F4006?
It’s designed specifically for the FingerTech F4006, using a 4×M3 pattern on a 12.00mm bolt circle. It may fit other motors with the same rotor-face pattern, but compatibility isn’t guaranteed.
What belts should I use with this pulley?
Use S3M timing belts that are 4.00mm wide; matching the 3.00mm tooth pitch and 4.00mm width ensures proper engagement and reliable power transfer.
Can I run this pulley without the steel flanges?
Flanges are recommended to keep the belt centered under shock loads. Running without them increases the chance of the belt walking off during a match.
How often should I replace the pulley?
The 6061-T6 pulley is very durable—belts typically wear out first. Replace the pulley only if teeth show visible wear, deformation, or damage.
Is threadlocker necessary for mounting?
Yes. Use a medium-strength (blue) threadlocker on the 4×M3 screws and re-check tightness before events. Vibration can loosen fasteners over time.
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