Unior Left Pedal Reamer And Tap - 5/8" X 24 TPI
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Product Information
Full details
This Unior Left Pedal Reamer and Tap is designed for bicycle mechanics and enthusiasts needing to maintain or repair left pedal threads. Its primary benefit is precisely cutting new threads or cleaning out damaged ones, ensuring secure pedal installation. A caveat is its specialized nature, requiring knowledge of thread sizes and usage. Key features include its premium flex plus carbon steel construction and precise hardening for durability and sharpness.
All features
| Model Part Number | 1695.1AL |
|---|---|
| Brand | Unior |
Extended Product Information
FAQs
What is the specific thread size this tool is for?
This tool is precisely for left pedal threads with a 5/8" X 24 TPI (Threads Per Inch) specification.
Can I use this for right pedal threads?
No, this tool is specifically designed for the left pedal thread, which has a reverse (left-hand) thread. Using it on the right pedal would be incorrect and potentially damaging.
What material is the tool made from?
The tool is made from premium Flex Plus carbon steel, known for its strength and durability.
Do I need a tap wrench to use this tool?
Yes, a tap wrench is required to hold and turn the reamer and tap securely. The tap wrench is not included with the tool.
What is the difference between a reamer and a tap in this context?
In this application, the tool acts as both. It 'reamers' to clean and slightly enlarge the existing thread area, and 'taps' to cut new, precise threads into the crank arm.
How often should I use cutting fluid?
It is recommended to use cutting fluid or a suitable lubricant generously throughout the threading process. Reapply every few turns or when backing the tool out to clear chips.
What if the crank arm threads are completely stripped?
If the threads are completely stripped beyond repair with this tool, you may need to consider specialized thread repair inserts or replacing the crank arm, depending on the severity.
Troubleshooting
Tool is difficult to turn
Ensure you are using sufficient cutting fluid/lubricant. Back the tool out a quarter turn to clear debris and try again with steady pressure.
Threads are not clean or sharp
Check if the tool is dull. Ensure you are using the correct 5/8" X 24 TPI specification and applying even, consistent pressure. Reapply lubricant generously.
Tool feels loose in the tap wrench
Ensure the tap wrench is properly tightened around the shank of the reamer/tap. Check that the tap wrench is the correct size for the tool.
Tool is breaking or chipping
Do not force the tool. Excessive force or cross-threading can damage the tool. Ensure the crank arm threads are relatively clean before starting.
Pros and Cons
Pros
- Durable construction from premium flex plus carbon steel.
- Ensures precise thread cutting for a secure fit.
- Restores damaged threads, extending the life of crank arms.
- Designed for specialized left pedal thread maintenance.
- Hardened for long-lasting sharpness.
Cons
- Highly specialized tool, not for general use.
- Requires specific knowledge of bicycle pedal threading (5/8" X 24 TPI).
- Can damage threads if used incorrectly.
- Requires a tap wrench for operation (not included).
Setup, Compatibility & Care
Setup: To use the Unior Left Pedal Reamer and Tap, secure it in a tap wrench. Ensure the crank arm is firmly held or the bike is securely mounted in a stand. Apply cutting fluid or a suitable lubricant to the threads and the tool. Carefully insert the reamer/tap into the left pedal threading hole and begin turning clockwise with the tap wrench. Use steady, even pressure and back the tool out periodically to clear chips and reapply lubricant.
Compatibility: This tool is specifically designed for left pedal threads with a 5/8" X 24 TPI specification. It is compatible with most bicycle crank arms that feature this standard threading for the left pedal.
Care: After each use, clean the tool thoroughly to remove any metal shavings or cutting fluid. A stiff brush can be helpful. Apply a light coat of oil to prevent rust and store the tool in a dry place, preferably in its original packaging or a tool roll to protect the cutting edges.