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Highland Park Lapidary HT14 - User Manual

Highland Park Lapidary HT14
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1 Main Street Whinsville MA 01588, United States
512-348-8528
info@hplapidary.com
www.hplapidary.com
Highland Park Lapidary Co.
Model HT14 Slab Saw
Operators Manual
Cauon: Read all safety and operang
instrucons before using this Equipment.
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Summary

HT14 SLAB SAW

Features and Specifications

Details the technical specifications and key features of the HT14 Slab Saw, including dimensions and components.

WHEN YOUR NEW HT14 SLAB SAW ARRIVES

Initial Setup and Checks

Instructions for checking the saw upon arrival, verifying components, and initial setup steps before operation.

MOTOR INSTALLATION

Belt Guard Installation

Guides on how to properly install the belt guard over the motor and pulleys for safety and operation.

SECURE MOUNTING OF THE HT14 SLAB SAW

COOLANT REQUIRED FOR PROPER OPERATION

Explains the type of coolant needed, the quantity required, and how to maintain the correct oil level for cutting.

DIAMOND BLADE OPERATION AND MAINTENANCE

Blade Sharpening

Details when to sharpen the blade, how often, and signs indicating the need for sharpening for optimal performance.

BLADE REMOVAL AND REPLACEMENT

Blade Replacement Procedure

Step-by-step guide on safely removing and installing a new diamond blade, including flange and nut tightening.

OPERATION OF THE HT14

Pre-Operation Checklist

A checklist of essential tasks to perform before starting the HT14 slab saw for safe and effective operation.

Clamping and Cutting Process

Detailed steps for clamping material in the vise and initiating the first cut on the HT14 slab saw.

Safe Start System Operation

Explanation of the 'Safe Start System' and how to correctly start and stop the saw to prevent accidental activation.

Warranty

Diamond Blades & Core Bits Warranty

Details the one-year warranty coverage for diamond blades and core bits, excluding specific types of damage.

Polishing Tools & Motors Warranty

Covers the 90-day warranty period for separately purchased polishing tools and motors.

Parts and Support

Contact Information and Resources

Provides contact details, website, and YouTube channel for obtaining support, parts, and tutorials.

Overview

The Highland Park HT14 Slab Saw is a precision lapidary machine designed for producing consistent, high-quality slabs of gemstone material. It is engineered to provide uniform, flat, and smooth cuts when used with the appropriate blade and cutting fluid. A key advantage of this 14-inch slab saw is its narrower blade width compared to larger machines, which minimizes material loss during cutting.

Function Description:

The HT14 Slab Saw operates by using a diamond blade to cut through rough lapidary material. It features an automatic powerfeed system that moves the workpiece into the blade at a controlled rate, ensuring consistent slab thickness. A "Safe Start System" is integrated to reduce the risk of accidental startup, requiring specific steps to initiate operation. The saw also includes an automatic cut-off switch, adjustable via a trip chain, which shuts off the saw after a predetermined length of cut. Proper cooling of the blade and material is maintained by a mineral oil cutting fluid, which is essential for optimal performance and longevity of both the blade and the machine.

Important Technical Specifications:

  • Workpiece Size: 5-1/2 x 7 inch Cross Section
  • Arbor Shaft: Tool steel machined to 3/4 inch bearing diameter, with a 5/8 inch diameter for the blade arbor.
  • Blade Flanges: Steel 3 inch outside diameter.
  • Blade: Greenline Agate Eater sintered diamond blade.
  • Safe Start System: Contactor interlock control system to reduce accidental startup risk.
  • Automatic Cut-Off Switch: Trip chain adjustable for different lengths of cut.
  • Powerfeed: Approximate workpiece infeed rates of 11-1/4 inches per hour (3/16 inches per minute).
  • Split Nut Drive: Engages carriage with powerfeed screw; released by a handle flip for quick carriage return.
  • Precision Carriage: Rides on precision-ground, hardened 3/4" steel rails, retained by adjustable 1/2 inch precision ground steel.
  • Crossfeed Ways: 1/2 inch precision ground steel.
  • Saw Box: Welded 16 gauge steel. Inside dimensions: 20 inches wide x 11-3/4 inches deep x 25-1/2 inches long. Overall height with hood closed: 20-1/4 inches.
  • Vise: Steel vise jaws with a maximum workable jaw opening of 5-1/2 x 7 inches. Lateral travel of vise assembly: 4-1/4 inches.
  • V-Belt: Connects motor to saw blade.
  • Motor: 110 volt NEMA 56 frame 1/2 Horsepower motor with thermal protection and start/run capacitors (220/230 volt 50/60 Hz available).
  • Weight: 145 lbs.
  • Coolant Capacity: Approximately 1 1/3 gallons of cutting oil for initial fill.
  • Common Slab Thicknesses (with Greenline Blade):
    • 1/2 inch: 14 turns of crossfeed handle
    • 3/8 inch: 11 turns of crossfeed handle
    • 1/4 inch: 8 turns of crossfeed handle
    • 3/16 inch: 6.5 turns of crossfeed handle
    • 1/8 inch: 5 turns of crossfeed handle

Usage Features:

The HT14 Slab Saw arrives assembled, with the motor shipped separately for user installation. Before operation, users must install the motor, belt guard, and blade, and ensure the saw is securely mounted on a strong, level workbench capable of supporting its 145 lbs weight plus oil and rock. A critical step before first use is adding a low-viscosity (5 to 7cst) mineral oil cutting fluid, such as Highland Park HPCool Cut™, to the saw box. The oil level should immerse the bottom of the blade by 1½ inches and be maintained during use. Water or water-soluble oils are explicitly prohibited as coolants, as they can cause excessive heat, damage the blade and material, rust key components, and void the warranty.

To begin cutting, the hood is opened, and the carriage feed lever is disengaged to manually position the carriage. Rough material is secured in the vise, with wood shims recommended for irregularly shaped rocks to ensure secure clamping. The maximum rock size that can be cut is 4.5" X 7", with users advised to check for clearance to prevent contact with the arbor nut or flange. The crossfeed of the vise is moved to the maximum right-hand position by turning the handle counter-clockwise to prepare for the first cut. The slab vise bar is lowered to contact the rock, and thumb screws are tightened securely. For sloping rock surfaces, a "notch" cutting procedure is recommended, involving short, repeated contacts between the blade and rock to create a flat starting surface, preventing blade deflection and damage.

The "Safe Start System" requires closing the hood, setting the auto shutoff toggle switch to "on," and then pushing and releasing the green start button. The saw will run as long as the toggle switch is in the "on" position. If the toggle switch is turned off manually or by the auto shut-off chain, the green button must be pushed again to restart the saw. This system prevents accidental startup if the toggle switch is moved to "on" while loading or unloading. The green button is a safety interlock, not an emergency off switch; for emergency stops, the toggle switch must be moved to the "off" position.

Maintenance Features:

Regular maintenance is crucial for the HT14 Slab Saw's performance and longevity.

  • Coolant Management: The cutting oil must be added before operation and periodically checked to maintain the proper level. Oil can be reused by draining it from the saw box, allowing sediments to settle in a 5-gallon pail for several days, and then pouring the clear oil back into the saw. Sediments should be removed from the saw box using a spatula or putty knife. Filtering the oil with paper grocery bags or coffee filters is an alternative to settling. Oil should be changed when it becomes significantly discolored or develops a thick, pudding-like consistency. Discarded oil must be disposed of according to state guidelines for mineral oil.
  • Blade Sharpening: The diamond blade should be sharpened periodically, typically every ten to twenty hours of actual cutting time, depending on the hardness and size of the rocks being cut. Sharpening revitalizes the cutting edge and prevents diminished cutting efficiency, slowing of blade rpm, laboring of the saw, and unusual sounds. Failure to sharpen can lead to cutting failure, dislodged stones, dishing or warpage of the blade, and damage to the feed mechanism or machine. Highland Park Lapidary provides a YouTube video demonstrating their recommended sharpening method.
  • Blade Removal and Replacement: When replacing a worn or damaged blade, the saw arbor nut must be removed by turning it counterclockwise. The blade can be held by hand, but care must be taken not to apply side force. If necessary, the belt guard can be removed to hold the belt or arbor pulley. When installing a new blade, ensure blade surfaces and flanges are clean and undamaged. The blade bushing should be tapped into the blade with a rubber mallet, then carefully positioned onto the arbor shaft. The outer flange is then placed, and the arbor nut is reinstalled, ensuring threads are clean and oiled for ease of future removal. The arbor nut should be snugged lightly, the arbor shaft rotated to seat the blade, and then the nut fully tightened, holding the blade, pulley, or shaft as needed.
  • General Inspection: Periodically inspect the saw for loose fasteners or damage, especially after shipping or during use, to address potential issues promptly.

The HT14 Slab Saw is backed by a one-year warranty covering defects in materials and workmanship, with specific exclusions for misuse, improper service, damage during transit, alterations, or use with unapproved materials or blades. Diamond blades are warranted for one year against material defects, while polishing tools and separately purchased motors have 90-day warranties.

Highland Park Lapidary HT14 Specifications

General IconGeneral
BrandHighland Park Lapidary
ModelHT14
CategorySaw
LanguageEnglish