Rotary Index Tables
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Basic Rotary Index Table Construction & Features

Effective as of 2010

Rotary Index Table Construction and Features are explained below:

PNEUMATIC DRIVE

• Double-acting Cylinder with precision honed brass tubing and self-adjusting Buna-N piston cups.
• Inlet pressure can be adjusted to provide exact force for moving load (and to prevent damage in case of accidental obstructions).
• Adjustable Flow Control to provide exact indexing speed required.
• Built in Plunger mounted at rear of Cylinder to actuate a Two-Way (V2), Three-Way (V23), or a Micro-Switch.
• Long trouble-free life.

CENTER STUD

• The hardened Center Stud has the top plate & index plate rigidly pinned to it.
• Stud is supported and rides in a 2-1/4” diameter x 9/16”long bronze bearing at top and an oilite bearing at the bottom.
• The gear and attached pawl oscillate about the stud on two needle bearings.
• A single grease fitting at the center lubricates all internal parts.

ACCESSORY PIN

Since the working parts of the table are completely enclosed, a rod extending thru a bronze bushing moves outward (approximately 1/4”) to actuate a valve or micro-switch for secondary operations as the table comes into it’s new indexed position. This pin remains extended while the Table is in the indexed position.

GUARANTEED ACCURACY WITHIN +/- .001
• All stations are accurate to each other within ± .001 measured at the periphery of the standard size top plate.
• Repeatability at a station is in the low tenths.

Rotary Index Tables Construction & Fetatures

FEED PAWL

• Hardened pawl stops against a hardened stop pin and prevents any forward rotary motion.
• Hardened anti-back-up pawl locks table against rearward rotary motion. (Located 180°from feed pawl.)

GEAR AND RACK CONSTRUCTION

A rack attached to the stainless steel piston rod drives a gear which carries a pawl to actuate the index plate. Only a rack and gear drive can transmit the straight line motion of the air cylinder to the necessary rotary motion with full power throughout its cycle. The rack is supported against thrust by two roller bearings independently of the piston rod. Rack, gear, pawl and index plate are all carefully hardened.

INDEX PLATE

The standard table can be set to index 90° (4 index), 60° (6 index), 45° (8 index), 30° (12 index), or 15° (24 index). Since the standard index plate has 24 teeth, baffles are used to prevent “loss of index,” that is, to prevent the pawl from engaging improper teeth When less than 24 index is required. These baffles are very reasonably priced and always available from stock. The changeover from one index setup to another can be made from the top of the index table, usually in less than 15 minutes.

Allenair Direct Rotary Index Table Construction is precise with all unique features Order Direct from Here
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	Basic Table No Control Circuit	Pilot-Timer Control Circuit (Continuous Automatic Indexing)	*Solenoid Bleed Pilot Control Circuit (Indexes on Momentary Signal)

	*Solenoid Pressure Pilot Control Circuit (Indexes on Momentary Signal)	Double Pressure Pilot Control Circuit (Indexes on Momentary Pressure Signal)	Double Bleed Pilot Control Circuit (Indexes on Momentary Bleed Signal)

Models 1-7 “SINGLE TIMER

Time-A-Valve ® offer many other control options. Ask about it when you call.

Models 8-10 “DUAL TIMER”

Time-A-Valve Models 1-7 SINGLE TIMER

Time-A-Valve Models 8-10 DUAL TIMER

For Detailed Information on Rotary Index Table Construction & Features Contact Us.