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Welker Shot Pins

  • Welker Shot Pins provide long term accuracy and repeatability for precision location.
  • Require NO lubrication and minimal maintenance.
  • Resistant to corrosion and weld spatter.
  • Steel & aluminum construction is structurally strong and durable yet lightweight.
  • Safety orange steel shrouds come standard on all units, protects seal from weld spray.
  • Inline shot pin ram is electrically insulated from body.
  • All Welker Shot Pins are NAAMS compatible.

Shot Pins:
UB2 Unibody Shot Pin
UB4 Unibody Shot Pin
SB4 Side-by-Side Shot Pins
SB6 Side-by-Side Shot Pins
WP4 Inline Shot Pins
WP6 Inline Shot Pins
HP5 Bull Pin
Legacy Shot Pins: WP2, SB2

Shot Pin Supplemental Rams


UB2 Unibody Shot Pin

Compact UB2 weighs just 6.5 lbs

UB2 features a pneumatic cylinder with integrated anti-rotate ram. Ideal for use as a retractable locating pin or straight acting clamp in applications where space is limited, such as end effectors, closures, door, decklid.

24mm square ram, standard strokes: 25, 50, 75mm
Rap or Rigid coupler
Optional solid state cylinder switch or World Switch
Aluminum ram unit available for weight reduction


UB4 Unibody Shot Pin

Welker UB4 is the industry standard for shot pins

UB4 features a pneumatic cylinder with integrated anti-rotate ram. Applications include retractable locating pin, straight acting clamp, part stop, probe slide and wedge lock.

40mm square ram, standard strokes: 25, 50, 75mm
Non-standard strokes: 100, 125, 150, 200mm
Rap or Rigid coupler
Optional solid state cylinder switch or World Switch
Aluminum ram unit available


SB4 & SB6 Side-by-Side Shot Pins

Compact footprint with Side-by-Side shot pins

SB4 & SB6 shot pins feature an independent pneumatic cylinder parallel to the ram, providing a more compact unit. Applications include retractable locating pins, part stops, probe slides and straight clamps. Mounting is provided for cylindicator style prox switches (not included).

SB4: 40mm square ram
SB6: 60mm square ram
Standard strokes: 25 to 200mm
Rap or Rigid coupler


WP4 & WP6 Shot Pins

Compact footprint with Side-by-Side shot pins

WP4 & WP6 inline shot pins feature an independent pneumatic or hydraulic cylinder. Cylinder switches available with pneumatic tie rod cylinders. Mounting is provided on standard pneumatic and hydraulic cylinders for cylindicator style prox switches (not included).

WP4: 40mm square ram
WP6: 60mm square ram
Standard strokes: 25 to 200mm
Rap or Rigid coupler


HP5 Bull Pin

HP5 with hyrdraulic or pneumatic actuator, shown with pin

HP5 heavy duty retracting locating pin features a 2kg slide hammer rap piston, delivering concentrated pulling power in frame line applications. A high-load PTFE composite bearing provides superior lube-free working load capacity. Chrome plated shaft is always fully engaged, offering long precision life. Easily accessible anti-rotate pin mount allows mounting of 2-way pins and crowder pads.

Available with pneumatic or hydraulic cylinder, optional cylinder switch or world switch


Legacy Shot Pins

WP2 SB2

WP2, SB2: Effective January 1, 2021, they will be available only as service parts.

Recommended replacements:
WP2: UB2
SB2: UB2

See Technical Bulletins for details