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Norlok | Clinching/Fastening Systems | Norlok Surelok Fitting Machine

Norlok clinching and fastening machines -  sheet metal clinchers

Norlok Heavy Duty SURELOK

Available in 18” or 25” throat, the Heavy Duty SURELOK model provides the ultimate strength to ensure all of your heavy material applications are taken care of. This air over oil booster powered machine can clinch material up to an astounding 10g.


  • Available in 18” or 25” throat depths
  • Typical shear strength for 2-ply 10g mild steel is 1400lbs per clinch
  • Fasten materials as thin as 24g and as thick as 10g
  • A double foot pedal controls the 1-1/2” low-pressure approach stroke and 1/2” high- pressure clinching stroke for added safety
  • Specially designed arm and form for even greater part access
  • Uses standard shop air supply. No electrical hookup.
  • Small footprint

Features of the Norlok Surelok Fitting Machine:

  • Press Design: Solid 3” steel “C” frame
  • Features:
    • Air over oil intensifier unit
    • Air surge tank and regulator
    • Dual foot pedal operated
  • Stroke: 2" max., ½” high pressure
  • Throat: 18” or 25”
  • Work Height: 45"
  • Upper Tooling:
    • Quick change punch
    • Hardened steel punch stripper
  • Lower Tooling Die insert in a 2-piece hardened die plate
  • Capacity MAX: Two ply 0.138” mild steel
  • MIN: Two ply 0.028” mild steel
  • Air Requirements 60psi to 80psi 65psi (recommended)Approx. 0.8 cu ft free air per cycle (3 HP @ 20 clinches per minute)



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Norlok SURELOK II - E & P Series Fitting Machine


The standard floor mounted machines are guaranteed to outperform the competition. The SURELOK II - E series machine is our basic entry level machine that offers proven clinching technology.

The SURELOK II - P series is our production oriented machine. Successor of our SURELOK II - E series machine, the P series offers greater clinching versatility and is able to fasten material from as thick as 14 gauge to as thin as 32 gauge. Proven clinching technology you can count on.

The SURELOK II - E and P series’ operating features and versatile designs offer solid and reliable machines that become your go-to clinching solutions.

Features of the Norlok Surelok II Fitting Machine:

  • Rigid steel frame offers less deflection for longer tool life
  • Close tooling access to get in close for more applications
  • Fast cycle times for increased production
  • 18” or 25” throats for greater reach for larger parts
  • “Intelligent” safety stroke for greater operator safety
  • Direct acting power stroke for more reliable joints
  • Simple tool adjustments for little or no setup time
  • Adjustable stroke that reduces pinch point and air consumption
  • Upgradeable feature allows you add what you need, when you need it
  • 23 years of design experience with proven reliability and quality
  • Air powered (requires no electrical hookup)
  • Affordable prices for low investment and faster payback

Options of the Norlok Surelok II Fitting Machine:

  • Production punch assembly
  • Modular tooling assembly
  • Automatic return
  • Advanced power Unit
  • Extended warranty
  • High speed control
  • Laser pointer

Pipe Diameter 4"Ø Reach into pipe 6"
Pipe Diameter 5"Ø Reach into pipe 11"

Standard Features for the Norlok Surelok II Clinching / Fastening Machine:

Throat 18" or 25" Choose the depth of frame behind punch
Urethane punch assembly Reliable tooling with urethane stripper
Close reach lower arm Clinch in tight areas – also great for pipes
2 piece die holder and insert Fast to change and easy to clean
Adjustable stroke Adjust open height to minimize pinch point
“Intelligent” Safety stroke Reduces pinch point to less than 1/4" even with 1" stroke
Lexan guard Eye protection without restricting access
Air surge tank Minimizes the effects of poor air supply
Air filter / regulator Nothing to add – just plug your air line into the tank
Frame mounted tool kit All tools required for adjustments are included


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Norlok SURELOK III Clinching Machine


Introducing Norlok's newest floor mounted problem solver with a 25” throat. The new SURELOK III is designed for all clinching applications and is faster, smoother, quieter and uses less air than ever before. This stainless steel ready machine offers a no hassle 2 minute changeover for efficient operation and production.

  • 25” throat
  • Stainless steel ready with simple punch and die changeover
  • Clinches material with 5 tons of force smoothly and efficiently using only 90psi shop air.
  • Tooling adapters designed for sheet metal work that needs a 5 ton press.
  • Adjustable 2 1/2” stroke
  • Convenient adjustment for accuracy and safety
  • Self Piercing Rivet kit available for any SURELOK III to join aluminum composite materials, TPO and PVC coatings. No pre drilled holes required.


Throat: 25" Choose the depth of frame behind punch
Round Punch: Comes with 1 punch, 3 Dies, Punch Stripper, and Die Collar
Close reach lower arm: Clinch in tight areas – also great for pipes
2 piece die holder and insert: Fast to change and easy to clean
Adjustable 2 1/2" stroke: Adjust open height to minimize pinch point
“Intelligent” Safety stroke: Reduces pinch point to less than 1/4" (6.4mm) even with 2 1/2" (64mm) stroke.
High speed control: 1 touch operation with increased speed & reliability
– includes pressure sensing circuit.
Laser pointer: Shows where clinch will be made – easy to use
– meets all regulations for laser pointers.
Air Filter / Regulator / Shutoff: Nothing to add – just plug your air line into the shut off valve
Extended Warranty: standard warranty is 3 years (punches and dies excluded).


Rectangular Tooling (for Stainless Steel, non-rotating, and Multi layer applications)
1 Complete Set of tooling for 0.12" (3mm) Rectangular clinching.
Includes a Punch Stripper for Rectangular Punch and a Die Collar for Rectangular Die.

Reversible Tooling (Punch or Die mounts in upper or lower tooling)
1 Set of tooling as either Ø0.18 Round (4.6mm) or 0.12" (3mm) Rectangular clinching.
Includes a Punch, Punch Stripper, and Tooling shaft. [Dies sold separately]

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