UNIST Mini-Piggyback Positive-Feed Drill Lubrication System

The Mini-Piggyback™ is designed to provide precise and repeatable lubrication directly on positive-feed drills. Its fully pneumatic operation automatically synchronizes lubricant delivery with drill operation, without requiring an electrical power supply.

The system uses compressed air supplied downstream from the drill trigger. It therefore operates whenever the drill is activated and stops dispensing lubricant when the drill is turned off. Its positive-displacement pump ensures controlled lubricant delivery, while independent adjustments for atomizing air and fluid output allow lubrication to be tailored to the cutting tool's requirements.

The Mini-Piggyback™ is available in two configurations. Continuous output provides a steady supply of lubricant for operations with long drilling cycles, while intermittent output delivers a single shot of lubricant for smaller cutting tools and short drilling cycles. The lubricant is contained in a removable reservoir that can be easily replaced when empty. Empty reservoirs can be refilled using the UNIST reservoir refill station, making them ready for reuse.

The system can be supplied by a removable reservoir mounted directly on the unit or by a remote gravity-fed reservoir. A pressurized reservoir supply is also available. This flexibility allows lubricant supply to be adapted to different installation requirements.

• Automatic and precise cutting tool lubrication
• Improved cutting tool life, potentially up to 500% depending on the application
• Improved hole quality and conformity
• Reduced lubricant consumption, as little as 2–4 oz (59–118 mL) per shift
• Fully pneumatic operation, with no electrical power required
• Easy installation on most positive-feed drills
• Removable and refillable reservoir
• Compatible with a wide variety of lubricants
• Pumps are warranted for life when used exclusively with UNIST Coolube® lubricant, subject to the manufacturer's warranty conditions
• Translucent reservoir
• Quick connect reservoir
• Adjustable fluid output
• Adjustable air output
• Variety of output tubes
• Easy mounting
• Instant ON / Instant OFF
• Uniform, consistent fluid output independent of back pressure
• Rugged design

Drilling with pneumatic positive-feed drills (ADUs)

A unique feature of the Mini-Piggyback™ system is its removable, interchangeable fluid reservoir. This allows lubricant to be replenished almost instantly by simply replacing the empty reservoir with a full one, maximizing tool productivity.

Reservoirs can be refilled with the appropriate lubricant, eliminating the need for disposable cartridges.

The Mini-Piggyback™ operates entirely on compressed air and automatically dispenses lubricant whenever the drill is running.

Air and fluid output can be precisely adjusted to match the lubrication requirements of different cutting tools and materials.

Allows swift and easy refilling of quick-change reservoirs

Adjust output with screwdriver

Adjust output with knob

Cover output adjustment with tamper-proof cover

Lubricate in single shots vs continuous output

Mounting bracket for simple and removable mounting

The Mini-Piggyback™ can be used with UNIST Coolube® cutting lubricants. Made from renewable plant-based resources, these biodegradable lubricants are designed to provide effective lubrication while reducing the use of traditional cutting fluids.

Applying small amounts of lubricant helps minimize fluid residue on tools, workpieces, and chips while reducing overall lubricant consumption.

UNIST offers a lifetime warranty on Mini-Piggyback™ system pumps when used exclusively with Coolube® lubricant, in accordance with the manufacturer's warranty conditions.