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.
Expansion Bolt
Expansion Bolts (Anchor Bolts): Overview
Material:
- Common materials:
- Body: Carbon steel (Grade 4.8/8.8), stainless steel (304/316), or alloy steel.
- Expansion sleeve: Mild steel, galvanized steel, or nylon (for lightweight applications).
- Surface treatments: Zinc plating, hot-dip galvanizing, or Dacromet coating for corrosion resistance.
Manufacturing Process:
- Cold Heading: Forms the bolt head and threaded shank.
- Sleeve Production:
- Steel sleeves: Stamped and slotted to create expandable segments.
- Nylon sleeves: Injection-molded for lightweight anchoring.
- Thread Rolling: Precision threading on the bolt shank.
- Heat Treatment: Applied to high-grade steel bolts for enhanced strength.
- Assembly: Bolt, sleeve, and nut are pre-assembled or packaged as a kit.
Key Production Considerations:
- Sleeve design: Slots or ridges to ensure uniform expansion when tightened.
- Thread accuracy: Ensures smooth engagement with nuts during installation.
- Material compatibility: Match sleeve material to substrate (e.g., steel for concrete, nylon for drywall).
- Coating adhesion: Critical for corrosion resistance in humid or outdoor environments.
Applications:
- Construction: Anchoring fixtures to concrete, brick, or masonry walls (e.g., handrails, HVAC units).
- Infrastructure: Securing pipelines, signage, and guardrails.
- Renovation: Mounting shelves, cabinets, or machinery to solid substrates.
- Utilities: Fixing electrical conduits, cable trays, and solar panels.
Installation:
- Drilling: Create a hole in the substrate matching the bolt diameter and depth.
- Cleaning: Remove debris from the hole using a brush or compressed air.
- Insertion: Place the expansion sleeve into the hole, followed by the bolt.
- Tightening: Rotate the nut to pull the bolt upward, expanding the sleeve against the hole walls.
- Torque control: Apply manufacturer-specified torque to avoid over-expansion or sleeve damage.
Note:
- Load capacity: Verify weight limits based on substrate strength (concrete vs. drywall).
- Substrate suitability: Not recommended for hollow or brittle materials without reinforcement.
- Environmental factors: Use stainless steel or galvanized variants in corrosive environments.
- Reusability: Most expansion bolts are single-use; sleeves deform permanently during installation.
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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