Cal-Royal CR441/TNDM Tandem Do...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$607.55
Cal-Royal Cal-Royal CR441/TNDM Door Closers, 2 CR441 and CONCR441 Kit CAL-CR441-TNDM

Cal-Royal CR441/TNDM Tandem Door Closer Kit for 260-520 lb Doors

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Model: CR441 / TNDM-ALUM
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$607.55
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Cal-Royal CR441/TNDM Tandem Door Closer Kit for 260-520 lb Doors

The Cal-Royal CR441/TNDM Tandem Door Closer Kit solves the problem of oversized, heavy commercial doors that exceed the capacity of a single closer. When a single door closer is not strong enough to close a door weighing 260 ~ 520 lbs, this kit connects two CR441 Series Grade 1 Door Closers together with a high-tensile strength steel connector sleeve nut mounted on a 6 11/16" x 6 11/16" x 3/16" steel mounting plate, doubling the strength and door weight capacity while maintaining the original opening force. The kit includes 1x CONCR441KIT and 2 each of CR441 door closers, giving installers a complete tandem solution in a single package for demanding commercial applications.

Key Features

  • Heavy-Duty Weight Capacity: Rated for doors weighing 260 ~ 520 lbs by combining two CR441 Series Grade 1 Door Closers into one tandem unit.
  • Steel Mounting Plate: 6 11/16" x 6 11/16" x 3/16" steel mounting plate provides a rigid, stable base for the connected closer assembly.
  • High-Tensile Connector Sleeve Nut: High tensile strength steel connector sleeve nut joins the two CR441 closers so they operate as a single, doubled-strength unit.
  • Versatile Mounting Options: Can be used for Regular Arm, Top Jamb, or Parallel Arm mounting configurations to fit a variety of door and frame conditions.
  • Complete Kit Contents: Includes 1x CONCR441KIT (connector sleeve nut, mounting plate, and master cover) plus 2 each of CR441 door closers for a ready-to-install tandem system.
  • Included Mounting Hardware: Supplied with 4" x ¼ - 20" x 2 ⅛" mounting screws for straightforward, secure installation.
  • Easy Installation: Designed for easy mounting with universal application across regular arm, top jamb, or parallel arm configurations.
  • Grade 1 Closer Construction: Built around Grade 1 rated CR441 door closers for commercial-grade durability and consistent closing performance.

Technical Specifications

  • Subcategory: Surface Mounted
  • Product Group: Door Controls
  • Product Subgroup: Door Closers - Surface Mounted
  • Product Type: Surface Mounted Door Closers
  • Commercial/Residential: Commercial
  • Product Model: CR441/TNDM
  • Product Category: Door Controls
  • Department: Door Hardware

Typical Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Retail Establishments
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings

Why Cal-Royal CR441?

Cal-Royal CR441/TNDM tandem closers deliver commercial-grade reliability by pairing two Grade 1 rated CR441 door closers with a high-tensile strength steel connector sleeve nut and rigid steel mounting plate. This engineered approach doubles door weight capacity up to 520 lbs while preserving consistent opening force, making it a dependable solution for oversized commercial doors that exceed standard single-closer limits.

Product Specs

Subcategory:
Surface Mounted
Product Group:
Door Controls
Product Subgroup:
Door Closers - Surface Mounted
Product Type:
Surface Mounted Door Closers
Commercial/Residential:
Commercial
Product Model:
CR441/TNDM
Product Category:
Door Controls
Department:
Door Hardware

Cal-Royal CR441 / TNDM-ALUM – Frequently Asked Questions

1) What actually comes in the Cal-Royal CR441/TNDM kit? Do I have to buy the closers separately?
Everything ships together. The kit is 1x CONCR441KIT, which is the connector sleeve nut, the steel mounting plate and a master cover, plus two CR441 door closers. Mounting screws are included as well. You are not sourcing the closers separately.
2) Can a tandem door closer be mounted parallel arm, or does it have to be regular arm?
All three standard configurations work with the CR441/TNDM: regular arm, top jamb, and parallel arm. That matters on tandem installs because heavy oversized doors are often push-side openings where parallel arm is the only practical layout. Pick the configuration your frame and swing allow, same as you would with a single closer.
3) Is a tandem closer kit the right call, or should I just use one heavy duty closer?
It depends on door weight. A single heavy duty surface closer, something like the BEST EHD9000 Series or the Falcon SC71A, handles ordinary commercial openings on its own. The CR441/TNDM exists for the doors those can't close: 260 to 520 lbs. If your door is inside the range of a single extra heavy duty unit, buy one closer. If it is an oversized, heavy leaf that a single closer will not shut reliably, the tandem pair is the fix, and it doubles capacity without forcing the user to push harder to open.
4) Will adding a second closer make the door harder to pull open?
No. The point of the tandem arrangement is that joining the two CR441 closers through the connector sleeve nut doubles the door weight capacity while maintaining the original opening force. Each closer carries half the work instead of one unit being overspringed to compensate. That is the difference between a tandem kit and simply installing a bigger spring size on a single closer.
5) If the door is under 260 lbs, what single heavy duty closer can be used instead of the Cal-Royal CR441/TNDM tandem kit?
The CR441/TNDM kit exists for oversized doors in the 260 to 520 lb range, where one closer is not enough. For a normal heavy commercial door that a single unit can handle, heavy duty surface closers include the BEST EHD9000 Series extra heavy-duty closer with adjustable spring sizes 1-6, the Falcon SC71A heavy-duty Grade 1 surface closer, the Sargent 1431 Powerglide heavy-duty closer with adjustable spring power, and the LCN 1460T heavy duty Grade 1 commercial closer. One of these on a standard opening avoids the second closer body, connector sleeve nut, and mounting plate entirely.
6) Is there a direct cross-brand equivalent to the Cal-Royal CR441/TNDM tandem closer kit?
No other closer in the comparable set is sold as a two-closer tandem package. The CR441/TNDM is specifically two CR441 Grade 1 closers joined by a high tensile steel connector sleeve nut on a 6 11/16 inch square by 3/16 inch steel plate. The closest alternatives are single extra heavy duty units such as the BEST EHD9000 Series or the Sargent 281 Powerglide cast iron heavy duty closer, which increase spring power within one body rather than combining two bodies. If the opening genuinely exceeds what a single spring can control, the tandem approach is what the CR441/TNDM provides.
7) Is the Cal-Royal CR441 tandem kit rated for commercial use in schools and hospitals?
It is a commercial-duty product, built around Grade 1 rated CR441 closers, and typical applications include educational facilities, healthcare institutions, office buildings, retail, industrial and warehouse space, multi-tenant residential and government buildings. Grade 1 is the highest ANSI/BHMA performance tier for closers and is what most institutional specs call for.
8) What should I use instead of the CR441/TNDM kit on a light interior office door?
The CR441/TNDM is built for doors weighing 260 to 520 lbs, which is far beyond a typical interior office door. For light duty interior openings, look at the Arrow DC314 Grade 1 light duty surface closer, the BEST SL6000 Series Grade 1 light duty closer, the LCN 1250 Series light duty closer in sizes 1-5, or the Norton Rixson 160 Series light commercial closer with adjustable spring. These are single-body units sized for light traffic rather than oversized doors.
9) I need hold open on a heavy door - does the CR441/TNDM tandem kit offer that, or should I look elsewhere?
The CR441/TNDM is supplied as two CR441 Grade 1 closers with a connector sleeve nut and steel mounting plate, usable in regular arm, top jamb, or parallel arm mounting. If hold open is the requirement, closers cataloged with a hold open arm include the Accentra 51 Series with a tri-packed hold open arm in sizes 1-6, the Orca Hardware BHDC1958HO/PA with a tri-packed hold open arm, and the Stanley Security A45-501HL with a long hold open arm for top jamb mounting.
10) Can I get the same tri-mount flexibility as the CR441/TNDM from a single closer?
Yes. The CR441/TNDM kit can be set up for regular arm, top jamb, or parallel arm mounting. Single closers with the same three-way mounting flexibility include the Dexter DCH1000 Series Grade 1 tri-mount closer with full cover, the Norton Rixson 8501A Grade 1 tri-mount closer with adjustable size 1-6 spring, and the Arrow DCN325 Grade 1 tri-pack closer with adjustable spring sizes 1-6. The difference is door weight: the tandem kit pairs two closer bodies for doors in the 260 to 520 lb range.
11) Is a drop plate like the Arrow DCN500DP a substitute for the CR441/TNDM mounting plate?
No. The Arrow DCN500DP is a parallel drop plate for the DCN500 closer, used to adapt a single closer to a frame condition. The plate in the CR441/TNDM kit is a 6 11/16 inch by 6 11/16 inch by 3/16 inch steel plate that carries the high tensile connector sleeve nut joining two CR441 closers into one tandem assembly. They serve different purposes and are not interchangeable.
12) For a heavy aluminum storefront door, is the CR441/TNDM kit the right choice or is there a storefront-specific closer?
The CR441/TNDM is a general commercial tandem kit for doors 260 to 520 lbs in regular arm, top jamb, or parallel arm mounting. For aluminum storefront specifically, the Norton Rixson 1600BC Series is cataloged as an aluminum storefront closer, heavy duty and Grade 1, with tri-style mounting. Pick the tandem kit when the door weight exceeds single-closer capacity; pick the storefront unit when the opening is a standard-weight aluminum door.
13) What finishes does the Cal-Royal tandem closer kit come in?
Two: Aluminum and Duronodic. Aluminum is the common match for clear anodized storefront and aluminum frames; Duronodic is the dark bronze tone used on bronze anodized entrances. If you are standardizing closers across a building, pick the one that matches the single closers already hung on your other openings.
14) Can I buy just the tandem connector hardware if I already own two CR441 closers?
The connector components are packaged as CONCR441KIT, which holds the connector sleeve nut, the steel mounting plate and the master cover. The CR441/TNDM is that kit bundled with two CR441 closers. If the two closers on your shelf are CR441s, the connector kit is the piece that joins them.
15) What Grade 1 medium duty closers compare to the CR441 closers used in the tandem kit?
The CR441/TNDM is built around Grade 1 rated CR441 closers. Other Grade 1 surface closers at medium duty include the Sargent 1131 for medium-traffic commercial applications, the Sargent 1331 with a universal aluminum body, the BEST HD7000 Series with adjustable spring power and backcheck control, and the Norton Rixson 1601P tri-mount Grade 1 closer with 180 degree swing. These are single-body closers, where the CR441/TNDM combines two closers for doors from 260 to 520 lbs.
How fast can I get the Cal-Royal CR441 / TNDM-ALUM 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 Cal-Royal CR441 / TNDM-ALUM come with a warranty?
Absolutely. The Cal-Royal CR441 / TNDM-ALUM 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 Cal-Royal CR441 / TNDM-ALUM?
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
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