LCN 4640-480 Shaft Extension K...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$84.87
$57.79
LCN 4640-480 shaft extension kit showing hex socket adapter, bolt with thread-lock patch, and split lock washer

LCN 4640-480 Shaft Extension Kit for Automatic Door Operators

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Model: 4640-480

In Stock (leaves warehouse same day if ordered before 3pm ET)

$84.87
$57.79
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LCN 4640-480 Shaft Extension Kit for 4640 Series Automatic Door Operators

The LCN 4640-480 is a shaft extension kit designed for use with LCN 4640 Series power operators. It provides the additional shaft length needed in installations where standard shaft reach is insufficient for proper door operation, such as offset mounting conditions or non-standard door frame configurations. The kit includes the components required for shaft extension integration with an existing 4640 Series operator.

Compatibility

  • Fits: LCN 4640 Series automatic door operators
  • Application: Commercial automatic door installations requiring extended shaft configurations

Specifications

  • Part Number: 4640-480
  • Series: 4640 Series
  • Product Type: Shaft Extension Kit
  • Use: Commercial
  • Warranty: 2 Year

Refer to LCN installation templates and the automatic operator catalog section (available in the Documents tab) to confirm shaft extension requirements for your specific application before ordering.

Product Specs

Series:
4640 Series
Warranty:
2 Year
Subcategory:
Parts and Accessories
Product Group:
Door Controls
Product Subgroup:
Parts and Accessories
Product Type:
Shaft Extension
Commercial/Residential:
Commercial
Product Category:
Door Controls
Department:
Door Hardware

LCN 4640-480 – Frequently Asked Questions

1) What does the LCN 4640-480 shaft extension kit actually do, and when do I need one?
The 4640-480 is an accessory for LCN 4640 series power door operators, not an operator itself. It extends the operator's drive shaft so the arm can reach the door in installations where the standard shaft length won't work, typically when the operator sits deeper than a normal header mounting because of a soffit, a deep frame, or a specialized mounting condition. If your 4640 operator lands in a standard header position and the arm reaches, you don't need it.
2) Will an LCN 4640-480 shaft extension work with a 4630 or another LCN operator?
No. The 4640-480 extension is built for the LCN 4640 series and matched to that operator's shaft. Don't order it for a 4630 or any other LCN operator family, even though the operators look similar from the outside. If you are working on a 4630, order the extension called out for that series instead.
3) Is the LCN 4640 shaft extension a complete kit, or do I need extra parts to install it?
It ships as a kit with the components needed to extend the shaft and tie back into the existing 4640 operator. What it does not include is the operator, the arm package, or the door hardware, so if you are building a new opening you are ordering those separately. On a retrofit where the operator is already up and only the reach is wrong, the kit is the part you add.
4) Where do I get the mounting template and install instructions for an LCN 4640 operator shaft extension?
LCN publishes a templates and instructions index covering its closers and automatic operators, and that index is where the 4640 sheets are pulled from. Two other documents help before you order: the LCN Automatic Operators catalog section, which covers operator mounting configurations, and the Choosing the Right Automatic Operator chart if the operator itself is still undecided. Doing the header measurement off the operator template first is what tells you whether the extension is needed at all.
5) Is the LCN 4640-480 extension rated for commercial door traffic, or is it a residential part?
Commercial. It's specified for LCN 4640 power operators in commercial buildings, and the applications LCN calls out are offices, healthcare, schools, retail, industrial and warehouse space, government buildings, and multi-tenant residential. For a facilities or MRO buyer standardizing on 4640 operators across a campus, this is the extension you stock for the openings with deep header conditions.
How fast can I get the LCN 4640-480 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the LCN 4640-480 come with a warranty?
Absolutely. The LCN 4640-480 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the LCN 4640-480?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the LCN 4640-480 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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