WR4104H Adjustable Hook Spanner Wrench, Round Head, 19-51mm (3/4"-2"), 50CrV Head, Matte Chrome
This adjustable hook spanner wrench features a round head with an adjustment range of 19-51mm (3/4″-2″). The head is forged from 50CrV steel while the handle is carbon steel, heat-treated to 42-46 HRC, and finished with matte chrome over a sandblasted and ground surface. Overall length 160mm, weight 148g. Designed for engaging with round holes on lock rings and bearing nuts.
We also offer this product with an adjustment range of 19-51mm, 32-76mm, 51-121mm, and 115-170mm.
Specifications
42-46 HRC
Product Description
Round Head for Pin-Style Lock Rings: The round profile is specifically shaped to engage with pin holes or small round slots found on certain types of bearing locknuts, retaining rings, and adjusting rings. This design allows precise positioning of the drive pin into the ring’s hole, minimizing the risk of slipping during high-torque adjustment.
Wide Adjustment Range for Machinery Maintenance: The adjustable jaw covers diameters from 19mm to 51mm (3/4 to 2 inches), fitting common lock ring sizes on industrial equipment such as presses, gearboxes, and milling machines. One wrench handles multiple ring diameters, reducing the number of specialized tools required in maintenance shops.
Dual-Material Construction for Optimized Weight: The head is made from 50CrV steel with full heat treatment (42-46 HRC) for strength at the critical engagement point, while the handle uses carbon steel to reduce overall weight. At 148g, this wrench is noticeably lighter than solid-alloy versions, reducing user fatigue during repeated adjustments.
Matte Chrome Finish with Textured Grip: Sandblasting and grinding prior to matte chrome plating create a smooth yet slightly textured surface that resists corrosion and reduces glare. The non-reflective finish is preferred in machine shops and production floors where overhead lighting creates harsh reflections.
Compact 160mm Length for Confined Access: The short overall length allows access to locknuts located in recessed areas, such as inside equipment housings, behind motor mounts, or on the backside of conveyor rollers. This is a common requirement when adjusting bearing preload or replacing seals without fully disassembling machinery.
