A: It depends.If we have bulk goods in stock, we can ship goods within 3 days after the QC process. If we don’t have stock, normally it takes 7-15 days for OEM samples and 20-30 days for bulk goods. If it refers to opening the new mold, it takes an extra 7-15 days to make the mold.
Internal Tooth Lock Washer
Internal/External Tooth Lock Washers:
Materials:
- Stainless steel (AISI 304/316 for corrosion resistance), carbon steel (heat-treated for strength), alloy steel (high-stress applications), or phosphor bronze (non-sparking, electrical uses).
- Surface treatments: Zinc plating, phosphate coating, or Dacromet for rust prevention and wear resistance.
Manufacturing Process:
- Stamping: Cut washer blanks with internal/external teeth from metal sheets.
- Forming: Press teeth into precise radial patterns using custom dies.
- Heat Treatment: Quenching and tempering (for steel) to enhance hardness and spring properties.
- Surface Finishing: Apply coatings or passivation for corrosion resistance.
Key Production Considerations:
- Tooth Sharpness: Ensure sharp, uniform teeth for maximum grip on mating surfaces.
- Alignment: Precise radial placement of internal/external teeth to prevent slippage.
- Deburring: Remove sharp edges to avoid damaging threads or components.
- Thickness Control: Maintain consistent material thickness to balance flexibility and strength.
Applications:
- Automotive: Secure engine components, exhaust systems, or suspension bolts.
- Machinery: Fasten rotating parts (e.g., pulleys, gears) in high-vibration equipment.
- Aerospace: Critical assemblies requiring anti-rotation (e.g., avionics, engine mounts).
- Electronics: Stabilize fasteners in devices exposed to thermal cycling.
- Construction: Reinforce structural bolts in bridges or steel frameworks.
Installation:
- Orientation: Place the washer with internal teeth facing the nut/bolt head and external teeth against the mating surface (or vice versa, depending on design).
- Tightening: Apply specified torque to embed teeth into both surfaces, creating a locking effect.
- Alignment: Ensure teeth engage evenly without tilting or misalignment.
- Reuse: Avoid reusing washers with flattened or worn teeth in critical applications.
Advantages:
- Dual-Sided Grip: Internal and external teeth lock both the fastener and mating surface.
- Vibration Resistance: Effective in dynamic or high-frequency vibration environments.
- Surface Compensation: Teeth adapt to minor surface irregularities for consistent contact.
Note:
- Replace washers if teeth are damaged or coatings are compromised.
- Avoid over-tightening, which may shear teeth or reduce spring action.
- Pair with threadlockers for extreme conditions (e.g., aerospace, marine).
Frequently Asked Questions
A: Normally, we make a 30% deposit after Pl confirmation and a 70% balance before shipment. lf order amountis too small, we can also change to 100% deposit in order to save bank handling charge.
A: A pre-bulk sample check can solve this problem to the largest extent. We will arrange production according to the pre-bulk sample quality standard after your confirmation of the samples.
A: We are not only a trading company but also a manufacturer. Our factory mainly focuses on mold design and quality inspection. Our bulk production may come from the factories we have worked with for a long time, and they are all ISO9001 certified. Through this cooperation model, we can not only ensure product quality and service, but also satisfy the diversified product needs of customers, and the price is more advantageous.
A: Yes,we are very glad to offer you samples.
However the express courier cost from our company to your required address will be upon your account.
Usually we use DHL, UPS, FEDEX or EMS as the courier.
It will take 3-7 days to arrive many Europe countries and North America.
Which express courier we will use, it’s up to your convenient or the express charge.
A: No,just part of our capable categories have been showed in our site.
If you are looking for relative industrial products, please feel free to contact us.
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