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4210 Series
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LCN 4210 Series
The 4210 Smoothee® Series is a heavy duty, high security closer with special components to minimize tampering and vandalism. Forged steel parallel arms and heavy gauge metal security covers are designed for correctional, vandal prone, institutional and other high traffic applications. The closer has passed 10,000,000 cycles in independent testing. A choice of finishes and cylinder functions meet correctional and vandal resistant requirements.
  • Standard 4210 series closer shipped with extra duty arm (non hold-open), metal security cover, and TORX Machine Screw pack
  • Sized cylinders for interior doors to 5’0” and exterior doors to 4’0”
  • Non-sized cylinder adjustable for interior doors to 4’6” and exterior doors to 3’6”
  • Closer mounts parallel arm, specify right or left swinging door
  • 4211 cylinder meets ADA requirements
  • Standard or optional custom powder coat finish
  • Optional SRI primer for installations in corrosive conditions
  • UL listed with EDA or CUSH arms for self-closing doors
  • Tested and certified under ANSI Standard A156.4, grade one
Extra Duty Arm, 4210-3077EDA
Non-handed parallel arm features solid forged steel main arm and forearm for potentially abusive installations. Double slab arm/pinion attachment for maximum strength.
Standard Security Track Arm, 4210T-3077T
Handed arm closer features solid forged steel, large cross section arm. Special threaded attachment of track roller for extra security. Double slab arm/pinion attachment for maximum strength. Can only be used with high security track roller, 4210T-3034. Roller is included with arm when 4210T-3077T is ordered separately.
CUSH-N-Stop® (CUSH) Arm, 4210-3077CNS
Optional, handed parallel arm features solid forged steel main arm and forearm with built-in stop in soffit shoe. Double slab arm/pinion attachment for maximum strength.
HCUSH Arm, 4210-3049CNS
Optional handed arm provides hold-open function with templated stop/hold-open points. Handle controls hold-open function. HCUSH arm not available with 4216 cylinder. Double slab arm/pinion attachment for maximum strength.

Standard Finishes:

  • Powder coat
  • Plated

Custom finishes available upon request


Cylinder Available
Non-handed x
Non-sized x
Sized x
Accessibility x
Delayed Action x

Cylinder, 4210-3071
Standard, handed cast iron cylinder assembly


Cover Available
Metal x

Security Cover, 4210-72MC
Standard, handed heavy gauge metal security cover. Four point mounting for extra security. Closer adjustments not accessible with cover installed.

Installation Accessories

Plate, 4210-18, 4210-18CUSH
Required for push side mount where top rail is less than 5 1/8” (130 mm), measured from the stop. Plate requires 2” (51 mm) minimum top rail measured from the stop. Plate also used with CUSH arm installations.

CUSH Shoe Support, 4210-30
Provide anchorage for fifth screw used with CUSH arms where reveal is less than 3 1/16” (78 mm)

Blade Stop Spacer, 4210-61
Lowers parallel arm shoe to clear 1/2” (13 mm) blade stop

CUSH Flush Panel Adapter, 4210-419
Provides horizontal mounting surface for CUSH shoe on single rabetted or flush frame