Commercial Self-closing Hinge

Auto Door Closer Hinge – Quiet Close Spring Hinge – Aesthetic- Fully Adjustable – Adjust Closing Force – Adjust Closing Speed. ADA Compliant – ANSI Grade 1 – UL Listed- Fire-rated

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TEMPLATE

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SPEC-US

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SPEC-NON US

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Automatic fire door closers-K51M

Full Mortise Hinges

Auto Door Closer Hinge – Quiet Close Spring Hinge – Aesthetic- Fully Adjustable – Adjust Closing Force – Adjust Closing Speed. ADA Compliant – ANSI Grade 1 – UL Listed- Fire-rated

Automatic fire door closers-K51M
Catalog
TEMPLATE
Spec-US
Spec-Non US

Looking For A Solution?

keep privacy

Private space

keep bugs outside

Keep bugs outside

easy to open

So easy to open the door

Installation tips

Mortise on both door and frame for optimal installation.
Make sure door and frame are well aligned and not sagging or tilted.

Fire door closers-hinge installation tips-1
  • Non-mortise: Preserve 10 mm distance between door edge and jamb
  • Mortise: Preserve 3-4 mm distance between door edge and jamb
Info of K51M -2
  • Mortise installation: Mortise prepared by door suppliers
Gate door-fire door closers
Interior doors-fire door closers
Metal frame door-fire door closers
Office metal frame door-fire door closers

Comparison with door closer

Waterson Self-closing hingeTraditional door closer
Position
On door and easy as regular hinges
On door and need to preserve installation space
Aesthetics
Elegant and minimized visual intrusion
Bulky and maximized visual intrusion
Opening
Effortless
Strenuous
Outdoor
Yes, High Weather resistance
Yes and easily broken
Fire resistanceYesYes
Durability
1 million cycle test passed
Mostly 20 thousand cycles depending on brands
CostHardware+ Installation+ Maintenance Low total costHardware+ Installation+ Maintenance High total cost
Waterson Self Closing Hinge V.S. Door Closer

Easy Open for Heavy Duty Doors

UL And SGS Test Report

Specification

US STANDARD MODEL

ModelDIMRadiusGaugeFinish
K51M-4004″ x 4″ (H*W)

      Square

  • 1/4R
  • 5/8R
0.13″
3.3MM
  • Satin Brushed
  • Polished
  • Golden
  • Black
K51M-4504.5″ x 4.5″ (H*W)
K51M-5005″ x 5″ (H*W)0.146″
3.71MM
K51M-500D5″ x 5″ (H*W)0.190″
4.83MM

OTHER COUNTRIES

ModelDIMDoor ThicknessGaugeFinish
K51M-6406″ x 4″ (H*W)35-45 mm4.1 mm
  • Satin Brushed
  • Polished
  • Golden
  • Black
K51M-6456″ x 4.5″ (H*W)40-50 mm
K51M-6506″ x 5″ (H*W)45-55 mm
K51M-6556″ x 5.5″ (H*W)50-60 mm
K51M-6606″ x 6″ (H*W)55-65 mm

US STANDARD MODEL

ModelDIMRadiusGaugeFinish
K51M-4004″ x 4″ (H*W)

      Square

  • 1/4R
  • 5/8R
0.13″
3.3MM
  • Satin Brushed
  • Polished
  • Golden
  • Black
K51M-4504.5″ x 4.5″ (H*W)
K51M-5005″ x 5″ (H*W)0.146″
3.71MM
K51M-500D5″ x 5″ (H*W)0.190″
4.83MM

OTHER COUNTRIES

ModelDIMDoor ThicknessGaugeFinish
K51M-6406″ x 4″ (H*W)35-45 mm4.1 mm
  • Satin Brushed
  • Polished
  • Golden
  • Black
K51M-6456″ x 4.5″ (H*W)40-50 mm
K51M-6506″ x 5″ (H*W)45-55 mm
K51M-6556″ x 5.5″ (H*W)50-60 mm
K51M-6606″ x 6″ (H*W)55-65 mm

Hinge Combination

US STANDARD MODEL

Door SpecSelf-closing CombinationSelf-closing & Hold-open Combination
≤ 260 lbs
< 7’0 x 4’0≤ 120kg
<2200 x 1250 mm
 ( SA, SA, SA1 ) =
( Top, Middle, Bottom)
( SB, SA, SA1 ) =
( Top, Middle, Bottom)
( DS, HA, SA1 ) =
(Top, Middle, Bottom)
≤ 330 lbs
< 8’0 x 4’0≤ 150kg
<2400 x 1250 mm
( SA, SA, SA1, SA1 ) =
( Top, Middle, Middle, Bottom)
Hole-open is not provided.
( DS, HA, SA1, SA1 ) =
( Top, Middle, Middle, Bottom)

OTHER COUNTRIES

Door SpecSelf-closing CombinationSelf-closing & Hold-open Combination
≤ 70kg ( DS, HA ) = ( Top, Bottom)
( SA, SA1 ) =( Top, Bottom)
( SB, HS ) = ( Top, Bottom)
≤ 120kg ( DS, HA, SA1 ) = (Top, Middle, Bottom)
( SA, SA, SA1 ) = (Top, Middle, Bottom)
 ( SB, SA, HS ) = (Top, Middle, Bottom)
( SB, SA, SA1 ) = (Top, Middle, Bottom)

US STANDARD MODEL

Door SpecSelf-closing CombinationSelf-closing & Hold-open Combination
≤ 260 lbs
< 7’0 x 4’0≤ 120kg
<2200 x 1250 mm
 ( SA, SA, SA1 ) =
( Top, Middle, Bottom)
( SB, SA, SA1 ) =
( Top, Middle, Bottom)
( DS, HA, SA1 ) =
(Top, Middle, Bottom)
≤ 330 lbs
< 8’0 x 4’0≤ 150kg
<2400 x 1250 mm
( SA, SA, SA1, SA1 ) =
( Top, Middle, Middle, Bottom)
Hole-open is not provided.
( DS, HA, SA1, SA1 ) =
( Top, Middle, Middle, Bottom)

OTHER COUNTRIES

Door SpecSelf-closing CombinationSelf-closing & Hold-open Combination
≤ 70kg ( DS, HA ) = ( Top, Bottom)
( SA, SA1 ) =( Top, Bottom)
( SB, HS ) = ( Top, Bottom)
≤ 120kg ( DS, HA, SA1 ) = (Top, Middle, Bottom)
( SA, SA, SA1 ) = (Top, Middle, Bottom)
 ( SB, SA, HS ) = (Top, Middle, Bottom)
( SB, SA, SA1 ) = (Top, Middle, Bottom)

Catalog

US AREA
Non-US Area

Specification

US Area
Non-US Area

Templates

K51M-400
K51M-450
K51M-640
K51M-645
K51M-650
K51M-655
K51M-660

Installation Instruction

Installation is lightning fast and easy! You only need one hex wrench to adjust hinges. Let’s see the operation guide!

Installation guide

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