Jet BD-7 Tabletop screw-cutting lathe. Passport, diagram, description, characteristics

Jet BD-7 Benchtop Lathe Manufacturer Details

the Jet BD-7 benchtop lathe is JPW Tools AG Switzerland. Website address: www.jettools.com

Behind the JET is a company with extensive experience in the production of wood and metalworking machines. Since 1950, JET has been developing, producing and selling machines in the USA, where it is the market leader.

An important event in the life of the company was the merger with the large industrial concern Walter Meier AG (Switzerland), which took place in 1988. For Jet, this was a step towards Europe; for Walter Meyer, it was the first experience in the machine tool industry outside of its native Switzerland, where the company had been involved in this area since 1937. Over time, the following brands were also acquired: Powermatic (USA), a manufacturer of high-quality woodworking machines, and Wilton (USA), under which vices and hand tools are presented.

Several years ago, JET was purchased by the Swiss company WMH Tool Group AG, which in turn is a subsidiary of the joint-stock company Walter Meier Holding AG , located in Zurich. This industrial group, which has more than 1,800 employees, has a turnover of US$560 million (2003). In addition to JET, WMH Group produces and sells such tool brands as WILTON, POWERMATIC, Columbian, Performax, known mainly in the US market. The turnover of these brands alone in the United States amounted to $230 million in 2003.

Machines manufactured by JPW Tools AG, Switzerland, China

JBTS-10
– circular table saw
JKM-300
– combined woodworking machine
JPS-10ts
– stationary circular saw
JPT-10B
— tabletop jointing-thicknessing machine
JPT-310
– stationary planer-thicknesser machine
JRT-2
– milling table
JTS-315sp
– construction circular saw
JWP-12
- table thickness planer
PKM-300
– combined woodworking machine
BD-3
— table lathe Ø 100
BD-7
— tabletop screw-cutting lathe Ø 180
BD-8
— tabletop screw-cutting lathe Ø 210
BD-920w
– table lathe Ø 220

Safety precautions

This machine must be grounded. In the event of a malfunction or breakdown, grounding provides the path of least resistance for electrical current and reduces the risk of electric shock. The machine is equipped with an electrical cord with a grounding conductor and a grounding plug. The plug must be inserted into a suitable outlet that is installed and grounded in accordance with local codes and regulations. Improper connection of the grounding conductor may result in a risk of electric shock. If in doubt, have a qualified electrician or technician check that the outlet is properly grounded. Do not change the plug supplied with the machine. The green/yellow conductor is the grounding conductor. If repair or replacement of the cord or plug is necessary, do not connect the conductor to live terminals. BD-7VS Lathe Operating Instructions 10 Use only 3-wire extension cords with grounded plugs. Repair a damaged or broken cable immediately. The use of extension cords is not recommended; Try to locate the machine near a power source. If an extension cord is needed, make sure it is in good condition. Using an extension cord that is too long will cause low circuit voltage, loss of power, and overheating. Use only extension cords marked H07RN-F, with wires ? 1.5mm2 or more. The total cable length must not exceed 18 meters. Network cables and plugs must not be damaged.

Manufactured by Jet (Switzerland/China). 2 year warranty.

Jet is a wide range of machines for working with wood and metal. Most models are addressed to professionals and are intended for use in small workshops and industrial enterprises. But there is also a separate entry-level hobby series.

Jet BD-7 desktop screw-cutting lathe. Purpose, scope

The Jet BD-7 desktop screw-cutting lathe is a “hobby” class machine and is intended for individual (household) use, i.e., due to its design features and technical characteristics, the machine is not intended for use in production.

The Jet BD-7 metal lathe is designed for processing workpieces made of metal, wood, and all types of plastic by turning.

The Jet BD-7 machine is a desktop universal screw-cutting lathe and is intended for all kinds of turning work:

grooving and boring of cylindrical, shaped and conical surfaces
drilling, chamfering
boring
segment
metric thread cutting
inch thread cutting
trimming ends
For machining large-diameter workpieces, it is possible to install return jaws in a self-centering chuck
For processing long workpieces, it is possible to install a movable and stationary steady rest
When installing the faceplate, you can perform a turning operation offset from the center of rotation
A wide range of adjustment of the rotation speed and longitudinal feed speed increases the arsenal of the cutting tools used

The traditional visual layout of the machine in combination with a proven kinematic diagram allows you to confidently provide turning with accuracy class “H” over a long service life.

Compared to small-sized machines offered on the market, it is easy to operate, reliable and durable.

The Jet BD-7 lathe operates from a single-phase alternating current network with a voltage of 220 V and a frequency of 50 Hz.

The Jet BD-7 machine can be operated under the following conditions:

ambient temperature from 1 to 35 °C
relative air humidity up to 80% at a temperature of 25 °C

Design features of the Jet BD-7 metal lathe:

A commutator motor is installed on the machine
The belt drive makes the machine operate quietly and protects the motor from overload
Magnetic starter eliminates spontaneous start-up after a temporary power outage
Spindle rotation reverse
Reverse carriage feed
Smooth adjustment of spindle rotation in two ranges
A set of replaceable gears makes it possible to cut metric threads with almost any pitch
The machine has a table for setting up the machine when cutting threads
For precise placement of the cutter into the groove of the previous pass when cutting threads, there is a thread cutting indicator
For precise feeding of calipers there are dials with scale divisions of 0.025 mm
Longitudinal and transverse movement of the calipers on a dovetail slide with the ability to adjust the smoothness of the ride and eliminate backlash
Rotary support for conical turning of short parts
For conical turning of long parts, the tailstock has a lateral offset, which is set on a scale
The machine is equipped with a tray for collecting chips
For safe operation there is a protective casing with a limit switch
Large selection of equipment

Standard delivery set for the BD 7 lathe

Rubber feet - 4
Plastic oiler - 1
Hex keys - 4
Chuck key - 1
Spare fuse - 1
Plastic handles/nuts and bolts - 2
Instructions -
Non-rotating center Morse taper No. 2 (for tailstock) -
Chuck jaws - 3
Wrenches 8x10 mm and 14x17 mm - 2
Gear set (inch and metric -

Equipment advantages

The advantages of the equipment include:

the ability to turn conical parts due to the presence of a headstock, which is shifted taking into account user-specified parameters;
the bed is made of high-quality cast iron, which eliminates any vibrations during operation;
the reversible mechanism ensures two-way supply of parts;
to improve the performance of the spindle, it was equipped with bearings, which are classified as roller type;
The operating mode of the machine is displayed on a special digital mechanism;
to effectively adjust the size of the gaps, special wedge-type strips are used;
The rotation speed of the spindle assembly changes in two directions while maintaining smoothness.

Spindle unit

General view of the Jet BD-7 screw-cutting lathe

Location of components of the Jet BD-7 screw-cutting lathe

Specification of components of the Jet BD-7 screw-cutting lathe

Headstock
Yellow light bulb
Chuck protection
Three jaw chuck
Tool holder
Cross caliper
Longitudinal support
Green light
Tailstock
Tailstock lock nut
bed
Auto feed screw bearing
Upper support handle
Thread indicator (accessory)
Auto feed handle
Caliper lateral movement handle
Caliper apron
Handle for longitudinal movement of the caliper
Auto feed screw
Spindle speed indicator
Thread setting table (accessory)
Gearbox cover
Speed change handle
Switch
Emergency switch
Speed Range Knob: High/Low
Feed screw/reverse lever

Description of the design of the Jet BD-7 lathe

Machine headstock

The motor transmits rotation to the spindle using a toothed belt. The spindle speed can be smoothly varied and is adjusted using the handle (23) located on the main control panel.

The spindle has a #3 Morse taper hole to allow the center to be used with a faceplate or rotary clamp.

A self-centering chuck (4) with three jaws is installed on the spindle (2). To remove the chuck, simply remove the three mounting nuts from the back of the spindle boss so that it can be pulled out freely along with the three locating pins.

For more efficient use of the chuck, three external jaws are supplied. For instructions on the use and installation of external cams, see the "Accessories" section.

There are 6 holes on the spindle flange for more convenient fixing of the faceplate. 4-jaw chuck (see Accessories).

Transmission

The gearbox is protected by a casing (22), which can be removed by unscrewing two hexagonal mounting screws.

The gear mechanism shown in Fig. 2, transmits rotation to the feed screw. The feed screw works like a worm, and during operation, the auto-feed handle (15), which is attached with a nut to the feed screw, transmits rotation to the caliper and then to the cutting tool. Thus, the feed is transmitted for thread cutting and turning. The feed screw speed and cutting tool speed are determined by the gearbox configuration. You can read about this in detail in the “Thread cutting” section.

You can stop the rotation of the feed screw using the handle (27). This handle is used to rotate the feed screw forward or backward (also described in the Threading section).

Tailstock of the machine

The cast part of the tailstock (9) can move along the frame and be installed in any desired position; its position is fixed with a nut (10). The tailstock quill has an internal Morse 2 taper for mounting the supplied center. You can also purchase a spinning center and drill chuck. (See Accessories).

Guides

On the guides there is a transverse support (6), on which an upper support (7) with a tool holder is installed, allowing complex and delicate operations to be performed. It can be moved by the lead screw through the drive nut to achieve automatic feeding when the automatic feeding lever (15) mounted on the housing (17) is operated.

The position of the tool can be adjusted by rotating the cross slide feed handle (16), which moves it across the machine and slide, or by rotating the manual feed handle (18), which moves the tool along the machine. To move the tool short distances at right angles to the cross slide, use the longitudinal slide feed handle (13). This operation is described in the Miter Cutting section.

The transverse and longitudinal calipers are equipped with a scale. The scale is used to move the tool to precise distances, one division is equal to 0.025 mm. The scale rotates with the feed handle. The scale on the feed of the transverse support can be rotated relative to the handle for ease of reading and fixed. The scale can be reset. This is described in more detail in the “Operation” section.

To fix the position of the tool in the tool holder, 8 hex bolts are used. For quick and easy replacement, 4 cutters can be installed. Two are already installed.

The tool holder rotates when the handle (A), which is located at the top, is loosened; The tool holder can be easily lifted and adjusted to the required position.

Before starting work, ALWAYS check that the tool holder and tool are securely secured by the handle.

Reviews and Reviews

Watch the videos (above) and reviews (below), they are often better than text reviews. You can read more reviews or leave your own in the comments to this page. Thank you for your review or rating!

Nice machine. It copes with its task. I hope that in future work he will not let you down and will earn back his money.
Roman 09.19.2019

I bought this machine 3 years ago. The best machine for your money. There are no complaints about the plastic gears! But there are minor problems, such as a very inconvenient tailstock clamping system; when the machine is turned on, the motor does not always turn on; you have to turn the chuck, only after that it will start. But the main drawback is that the support can be moved by hand simply by pushing it back and forth; when facing, the cutter moves out of the plane.. Perhaps I don’t understand something and I just need to tighten the screw somewhere.
Leonid 07/31/2019

Rate this model:

Model rating: 4.1 / 5. Number of ratings: 7

Technical characteristics of the Jet BD-7 machine

Parameter name	Jet BD-7	Corvette-401	Corvette-402	Corvette-403
Basic machine parameters
The largest diameter of the workpiece above the bed, mm	180	180	220	220
The largest diameter of the workpiece above the support, mm	110
Maximum length of the workpiece at centers (RMC), mm	300	300	500	750
Recommended turning depth per pass, mm	0,1	0,1	0,2	0,2
Maximum turning depth in one pass, mm	0,2	0,2	0,3	0,3
Maximum cutter holder size, mm	8 x 8	10 x 10	13 x 13	13 x 13
Spindle
Diameter of through hole in spindle, mm	20	20	20	20
Morse taper spindle	Morse 3	Morse 3	Morse 3	Morse 3
Number of speed steps for direct spindle rotation	B/s	B/s	6	6
Spindle direct rotation frequency, rpm	100..1200, 300..3000	0..1100, 0..2500	100, 250, 350, 500, 900, 1800	100, 250, 350, 500, 900, 1800
Number of spindle reverse rotation frequency steps	B/s	B/s	6	6
Spindle reverse rotation frequency, rpm	100..1200, 300..3000	0..1100, 0..2500	100, 250, 350, 500, 900, 1800	100, 250, 350, 500, 900, 1800
Diameter of lathe chuck, mm	80	80	100	100
Maximum radial runout of the spindle, mm	0,01	0,01	0,01	0,01
Spindle braking	No	No	No	No
Handle lock	No	No	No	No
Caliper. Submissions
Maximum longitudinal movement of the caliper carriage, mm	405
Longitudinal movement of the caliper by one dial division, mm	0,025	0,025	0,025	0,025
Maximum lateral movement of the caliper, mm	65	65	110	110
Transverse movement of the caliper by one division of the dial, mm	0,025	0,025	0,025	0,025
Maximum movement of the upper (incisor) slide (rotary support), mm	50	35	50	50
Movement of the cutting slide by one division of the dial, mm	0,025	0,025	0,025	0,025
Angle of rotation of the cutting slide, degrees	±45°	±45°	±45°	±45°
Number of stages of longitudinal feed of the caliper	B/s	B/s
Limits of longitudinal working feeds of the caliper, mm/rev	0,09	B/s	0,12..0,33	0,11..0,30
Limits of working cross feeds of the caliper, mm/rev	No	No	No	No
Number of metric threads to be cut	10	9	12	12
Limits of pitches of cut metric threads, mm	0,4..2,0	0,5..2,5	0,5..3,0	0,5..3,0
Limits of pitches of cut inch threads	12..52	No	8..56	8..56
Limits of pitches of cut modular threads	No	No	No	No
Limits of pitches of cut pitch threads	No	No	No	No
Tailstock
Morse taper tailstock	№2	№2	№2	№2
Maximum movement of the quill, mm	40	40	40	40
Electrical equipment
Rated supply voltage, V	220V 50Hz	220V 50Hz	220V 50Hz	220V 50Hz
Main drive electric motor, kW	0.59 collector	0.5 collector	0,75	0,75
Dimensions and weight of the machine
Machine dimensions (length width height), mm	870 x 300 x 290	850 x 305 x 320	1030 x 480 x 475	1250 x 480 x 475
Machine weight, kg	44	38	105	120