Value Collection 637-7538 Tool Steel Parallel Set 8pc

Product Description

The VALUE COLLECTION 637-7538 is an 8-piece tool steel parallel set designed for precision layout work, machine setups, and workholding applications in metalworking and machining environments. Sold as 4 matched pairs, each parallel measures 6 inches in length and is precision ground and hardened to 55-62 RC hardness for dimensional stability and long service life. The set spans a minimum height of 1 inch and a maximum height of 1-3/4 inches, with thickness ranging from 3/16 inch to 1/2 inch. Parallelism is held to 0.0003 inch and overall accuracy is 0.0010 inch. Stress-relieved tool steel construction resists distortion under repeated use. Holes are incorporated into each parallel for easier handling during setup. The set ships in a wooden storage case.

This parallel set is suited for use in machine shops, tool rooms, and production environments. Machinists and toolmakers reach for precision parallels when establishing reference surfaces on milling machines, surface grinders, and inspection setups. The four pair configuration covers a practical range of heights and thicknesses, making the set useful across a variety of vise setups and part-holding scenarios. Typical users include journeyman machinists, apprentices building out a tool kit, and toolroom technicians maintaining setup standards.

Key Features

• 8 pieces (4 matched pairs) in one set covering multiple height and thickness combinations
• Precision ground and hardened tool steel with 55-62 RC hardness rating
• Parallelism held to 0.0003 inch; accuracy to 0.0010 inch
• Stress-relieved construction minimizes distortion over time
• Handling holes incorporated into each parallel for easier grip during setup
• Includes wooden storage case to protect ground surfaces between uses

Compatibility

Designed as a general-purpose precision parallel set suitable for use with standard machinist vises, surface plates, and milling machine setups requiring reference-height support.

Installation Notes

Precision parallels are a hand-placement tool and do not require fastening or installation hardware. Keep ground surfaces clean and free of chips or coolant residue before placing parallels under a workpiece, as contamination will affect seating accuracy. Store parallels in the included wooden case when not in use to prevent nicking or corrosion of the ground faces. Handle with care to avoid dropping, which can alter the ground geometry.