4" Grip Head - No 1-1/8" Junior Pin
Engineering Fact Sheet & Mechanical Specifications
V-Groove Jaw Architecture 4-Point Tangent Grip
| V-Groove Broached Openings | 1-1/8" Junior, 5/8" Baby, 1/2" Rod, and 1-1/2" Speed-Rail Pipe |
| Locking Torque Rating | 150 ft-lbs (203 N·m) |
| T-Handle Leverage | Oversized Ergonomic Cast Alloy |
| Safety Design Factor | 5:1 ASME B30.26 / B30.10 |
Metallurgy & Friction Tribology Anti-Galling Brass
| Knuckle Body Alloy | 6061-T6 Cast / CNC Aluminum |
| Friction Brake Disc | CDA 360 Solid Brass (3.0% Pb) |
| Mounting Pin / Interface | 1-1/8" Junior Solid Steel Pin |
| Corrosion Protection | Hardcoat Anodize / Zn-Ni |
Grip Head Tribology & Hollywood Rigging Protocols
Set Safety ProtocolsCDA 360 Solid Brass Friction Disc
150 FT-LBS LOCKINGSolid CDA 360 free-cutting brass friction discs eliminate galling and aluminum-on-aluminum seizure under extreme clamp tension, providing consistent, non-slip locking torque up to 150 ft-lbs (203 N·m).
Precision Broached V-Grooves
4-POINT TANGENT CONTACTBroached V-groove channels establish positive 4-point tangent contact around mounting pins and tubes. This prevents crushing hollow gobo tubes while completely preventing axial slip and rotation.
The Right-Hand Rule of Rigging
CLOCKWISE GRAVITY LOCKAlways orient the grip head so the downward load moment acts clockwise on the T-handle. Gravity actively tightens the knuckle brake discs; reversing the orientation causes premature loosening and fixture drop.
Complete Your Grip Rigging Package
Pairs seamlessly with 20"–40" Extension Gobo Arms, C-Stands, Combo Stands, and Butterfly Frames.
Standard Hardware Lifetime Warranty
All Norms grip heads and rigging knuckles are backed by a complete lifetime warranty against manufacturing defects.
Product Info
| Color | Polished or Void Black |