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Kuroda Jena Tec Holdings Ltd
TPG – Toolpost Grinders Catalogue

TPG – Toolpost Grinders Catalogue

Product catalog summary

Overview
The Jena-Tec Duplex Tool-Post Grinding Units are designed for precision and durability, featuring enclosed fan-cooled motors and balanced rotating parts. They comply with BS 4581 Pt2 and ISO R6666 standards, with interchangeable flanges available for various models. Custom units can be tailored for specific applications.

Heavy Duty Tool-Post Grinders
Equipped with precision ball or roller bearings and enclosed motors with external fan cooling, these grinders include a switch box for easy control and are designed with safety in mind. They can be customized for left or right-hand use and are available for repair and reconditioning.

Internal and External Tool-Post Grinders
These grinders require special flanges for cup wheels and are available in various types with different specifications for wheel size, speed, and motor power. Suitable for lathes of varying center heights, they can include built-in diamond dressers.

Long Reach Quills and Spindles
Designed for deep hole grinding, these quills and spindles are interchangeable with standard quills and come in various lengths and diameters. They are used for grinding smaller diameter bores at considerable depths.

Motorised Grinding Heads
Available in 3-phase only, these compact units are suitable for special purpose machines, featuring precision grinding spindles in different power ratings and speeds.

Direct Drive, High Frequency Tool-Post Grinders
The D68 and D69 units are direct-driven internal grinders designed for quick trueing of chuck jaws, operating at high speeds and continuously rated.

Specifications

Direct Drive Tool-Post Grinders: Available for 3-phase supply, powered by rotor/stator units with speeds of 1450 and 2900 rpm on 50 Hz and 1720 and 3400 rpm on 60 Hz.
Indirect Drive Tool-Post Grinders: Belt-driven, offering flexibility for both external and internal grinding.
Abrasive Band Tool-Post Grinders: Designed for effective use of modern abrasive bands, featuring a rigid cartridge type spindle.

Key Features

Grinders run at constant speed due to solid-state frequency converters.
Mounting arms allow for adjustable positioning.
Left-hand threads direct sparks and dust away from the operator.
Electrical interlocks prevent damage to converters if disconnected during operation.

Operational Instructions

Ensure correct mounting on lathes by aligning the grinder's center line with the lathe axis.
Inspect grinding wheels for damage and use paper blotters during fitting.
Adjust belt tension appropriately to avoid wear.
Check rotation direction and ensure wheel guards are in place before operation.

Safety and Maintenance

Regularly inspect and dress grinding wheels before use.
Ensure proper earthing of motors and check rotation direction for three-phase machines.
Follow safety protocols for mounting and operating grinders.

Applications

Suitable for grinding a variety of materials including steel, non-ferrous metals, and hard materials.
Offers flexibility in material removal rates and finish quality based on grit size and contact area.

Wheel Selection

Abrasive Type: Identified by numbers or letters, varies by manufacturer.
Grit Size: Ranges from 9-900, typically 36-100 for most uses.
Grade: Soft 'E' to very hard 'Z', usually between 'J' & 'P'.
Bond: Typically 'V' for vitrified, 'R' for resinoid in cut-off wheels.

Wheel Speeds: Vitrified wheels should operate between 5,000 ft/min (27m/sec) and 6,500 ft/min (35m/sec).

Wheels for External and Internal Work

Dress the wheel before use to remove radial run-out and axial wobble.
Use a shallow cup for shoulder grinding to avoid smearing.
Choose wheel size based on bore size, avoid excessive contact area.

Coolant and Grinding Dust

Coolant reduces heat and dust, essential for internal work.
Grinding dust should be managed with coolant or dust-extraction units.

Diamond Dressers

Use diamonds sparingly; 0.3 to 0.5 carat for wheels up to 8", 1 carat for larger wheels.

Use and Maintenance

Bearings are precision units, adjustments should be minimal.
Spindles have sealed lubrication, require no maintenance.
Spare parts require machine serial and type number for orders.

Grinding Spindles

Various models available for external and internal grinding, with specific drive types and wheel diameters.

Capacities and Capabilities

Follow correct mounting procedures and speed checks to prevent accidents.
Vitrified bond wheels have specific speed limits based on size.

Notes on Fitting Wheels

Never use damaged wheels or exceed marked speed limits.
Ensure wheel guard is in place before starting the machine.

High Frequency Machines

Direct drive internal grinders require specific power supply setups.
Inverter settings are factory-set and should not be adjusted in the field.

Catalog excerpts

333A Bell Park Drive E.mail: [email protected] Jena Rotary Technology Limited Willow Drive Sherwood Park E.mail: [email protected] engineering technology group

Open the catalog to page 1

Jena-Tec Duplex - Page 2 of 26 HEAVY DUTY TOOL-POST GRINDERS page 4/5 INTERNAL AND EXTERNAL TOOL-POST GRINDERS page 6-9 LONG REACH QUILLS FOR DEEP HOLE GRINDING page 10 STEP TYPE LONG REACH SPINDLES page 11 MOTORISED GRINDING HEADS page 12 DIRECT DRIVE, HIGH FREQUENCY TOOL-POST GRINDERS page 13 ABRASIVE TOOL-POST GRINDERS page 14/15 REPLACEMENT GRINDING WHEELS page 16 REPLACEMENT ABRASIVE BANDS page 17 DUPLEX TOOL-POST GRINDERS INSTRUCTIONS FOR OPERATION page 18-27 DUPLEX TOOL-POST GRINDERS INSTRUCTIONS FOR OPERATION INSTALLATION & MOUNTING page 20 WHEEL SELECTION page 21/22 GRINDING SPINDLES...

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Jena-Tec Duplex - Page DUPLEX - PRECISION GRINDING OVERVIEW The Jena-Tec Duplex range of Tool-Post Grinding Units incorporating precision spindles offer reliability and durability. The units incorporate enclosed fan cooled motors and special attention is given to ensure accurate balance of all rotating parts. Wheel flanges, manufactured in mild steel, are to BS 4581 Pt2 and ISO R6666 Standards. A wide range of flanges are interchangeable on the various models. Special Duplex Tool-Post Grinding Units are available to suit specific application requirements. Please discuss with a Jena-Tec rotary...

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Jena-Tec Duplex - Page HEAVY DUTY TOOL-POST GRINDERS General Specification SPINDLES Precision Ball or Roller Bearings are used throughout the range. MOTORS All types have totally enclosed motors with external fan cooling. Particular care is taken to ensure accurate balance of rotating parts. SWITCHES A Switch Box with start & stop buttons is mounted on a plate adjacent to the motor, for quick control. WHEEL FLANGES Mild Steel to BSI 4581 Pt2/ISO R6666 for Grinding Wheels. An interchange system is standard on Types D.31, D.30A, D.31A, D.31B, D.32, D.33, D70, D71 and D72. Flange and wheels can...

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Jena-Tec Duplex - Page HEAVY DUTY TOOL-POST GRINDERS LEFT AND RIGHT HAND UNITS Right Hand Left Hand 98% of all units supplied are right hand and fit onto the normal front tool-post. Left hand units can be supplied for use on the rear Tool-Post or a copy attachment. Such units will have spindles with left hand threads. SPECIAL UNITS Units designed and manufactured to customers requirements are available. Contact our Sales Office with your specifications. REPAIR, SERVICE AND RECONDITIONING When your spindle requires attention we recommend that it should be returned to us, where it will receive...

Open the catalog to page 5

Jena-Tec Duplex - Page INTERNAL AND EXTERNAL TOOL-POST GRINDERS *SPECIAL FLANGES REQUIRED FOR CUP WHEELS Dimension Sheet Plain Wheels – Inches mm Inches mm Cup Wheels (Flared) Inches mm * Grinding Depth With Ext. inches Wheel mm With Int inches Extension mm Smallest bore with Standard extension For Lathes of Centre Height 3 Phase Quill Dia Belts Can Built-in Diamond Dresser be fitted Motor Power

Open the catalog to page 6

Jena-Tec Duplex - Page INTERNAL AND EXTERNAL TOOL-POST GRINDERS *SPECIAL FLANGES REQUIRED FOR CUP WHEELS Dimension Sheet Plain Wheels – Inches mm Inches mm Cup Wheels (Flared) Inches mm * Grinding Depth With Ext. inches Wheel mm Extension mm Smallest bore with Standard extension Motor Power For Lathes of Centre Height Can Built-in Diamond Dresser be fitted

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Jena-Tec Duplex - Page INTERNAL AND EXTERNAL TOOL-POST GRINDERS D.26 for 31/2" (87mm) Centre height lathes. Internal and External. D.27 for 5" (127mm) Centre height and larger lathes. Internal and External. D.30A, D.31 for 7" (215mm) Centre height and larger lathes. D.30A External. D.31 Internal and External D.31A, D.31B for 7" (175mm) Centre height and larger lathes. D.31A External. D.31B Internal and External D.28, D.29 for 7" (175mm) Centre height and larger lathes. D.28 External. D.29 Internal and External DIAMOND DRESSERS 3949 (10mm - 50mm 3949 (10mm - 50mm For mounting on the work or tailstock...

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Jena-Tec Duplex - Page EXTERNAL HEAVY DUTY TOOL-POST GRINDERS These Heavy Duty units can be used with plain, form or cup wheels in any position from the horizontal to the vertical. MOTORS are totally enclosed and surface cooled. Particular care is taken to secure accurate balancing. SPINDLES run in taper roller bearings, protected by seals. FLANGES are made from sawn Mild Steel blanks, and are to BS 4581 Pt2 and ISO R6666 Standards. An interchangeable system is standard on D.32 and D.33, i.e., flange and wheels can be removed as one unit and replaced by others without the necessity or re-trueing....

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Jena-Tec Duplex - Page LONG REACH QUILLS FOR DEEP HOLE GRINDING These quills have solved many awkward production problems, and are an invaluable accessory. They provide a means of machining a workpiece without the deflection that might be caused by a cutting tool. The massive bases of the larger Duplex grinders provide adequate anchorage. They are readily interchangeable with the standard quills. High precision bearings are used throughout, the longer sizes having supporting bearing or bearings in the centre. STANDARD LENGTHS Effective Grinding Depth Quill Diameter Drive Equipment includes Spindle...

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Jena-Tec Duplex - Page STEP TYPE LONG REACH SPINDLES Production Engineers are sometimes faced with the problem of accurately grinding smaller diameter bores of considerable depth. The spindles listed below are interchangeable with the standard of the ‘Duplex’ Grinders listed. Other sizes can be made subject to design limitations and the necessity of having bearing directly behind the grinding wheels. SPECIFICATION Spindle *Driving Equipment *DRIVE EQUIPMENT NEEDED FOR VEE BELT MODELS ONLY D.28, D.30A, D.31A, D.32 & D.3

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Jena-Tec Duplex - page MOTORISED GRINDING HEADS 3-Phase only These compact and substantially built units comprise, basically, a precision grinding spindle with a 3-phase rotor/starter unit mounted thereon. Bearings are grease packed and sealed for life. They can be used in lubricated. All sizes lend themselves very readily for building into special purpose machines either singly or in banks for progressive grinding operations. They are also suitable for use on vertical boring machines where compactness is desirable. Units can be built left hand if required. Type D.70 had an on/off switch built...

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TPG – Toolpost Grinders Catalogue

TPG – Toolpost Grinders Catalogue

Catalog excerpts

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