649-1

The Starrett 649 Series Spindle Square offers accuracy, convenience and significant time saving with the common shop task of tramming the head of a vertical milling machine. This must be done regularly to ensure squarness and perpendicularity between the spindle and work surface. The spindle square is easier to use and more precise than the traditional method of tramming with a dial test indicator. .001" Grad, 0-50-0 Dial; .250" Range.

Features

• Rugged and simple unit construction with a universally fitting design
• The gear unit is constructed of a massive single bridge and plate assembly with a hardened stainless steel gear train
• All gear trains are fully jeweled for sensitivity, smoothness and life
• The case is light but sturdy, with a hardened, precision stainless steel rack that rides in bronze bushings, size Groups 0 and 1 indicators are of similar construction but smaller in size
• Hardened stainless steel bottom stems can be held in fixtures without cramping rack action
• Easy readability with the best, balanced style of graduation and number combination
• Balanced and tapered hands are easy-to follow
• Special non-shock mechanism is ideal for when an indicator may be subjected to repeated and excessive shocks
• Sharp bezel serrations for positive grip
• Unbreakable crystal, 3/8 in Dia stem
• Positive acting clamp locks bezel in position
• No-glare satin finish on case
• Interchangeable contact point
• Four screw holes for 90 deg rotation of back
• Direct acting compression spring eliminates side friction
• Hardened stainless steel rack, gears, spindle and pinions
• Fully assembled with two AGD group 2 dial indicators
• Patented design, 4 lbs with custom case, 6-3/4 in W and 5-1/2 in from the top of shank to the end of the contact point