*****ADAPTORS ONLY FIT IN INSERT VERSION CHUCKS.  See below...******


DETERMINING YOUR LATHE SPINDLE THREAD TO FIND THE CORRECT NOVA INSERT ADAPTOR 

1. Refer to the insert/adaptor chart (below) to see if your lathe is listed.
If listed make a note of the SKU:______ (example IDNS, IENS, etc)

2. If not listed, look in your manual or sales literature to find the thread size.


Make a note of these:

  • Machine make:
  • Machine model thread size (if known):
  • Inboard thread (LH – left hand or RH right hand or both:
    (Look at our insert/adaptor chart below to find your size)


3. If you don’t have a manual, contact your supplier to get a copy of your manual and find out your spindle size. If they don’t have the info you can call your manufacturer. (Then look at our insert/adaptor chart below to find your size).

4. If you have reliable information for your spindle thread size but there is no match on the chart, you may have an unusual lathe that NOVA doesn’t have an adaptor for. You will need to purchase a blank chuck or a blank insert/adaptor and get it threaded to your requirements.

5. If you can’t find the information on your spindle thread size you will need to take some measurements on your lathe spindle. You only need to do these measurements if you can’t find the info anywhere else.

TAKE THESE MEASUREMENTS:
1. Outside diameter of thread:
2. Pitch of thread:
3. Length of thread:
4. Register diameter:
5. Register length:

Caution:
Ensure that the thread on the adapter and lathe spindle has the exact same pitch and standard. Even if the thread size is the same there are different standards of threads, e.g. UNC/UNF and BSW. If mismatching standard threads are used it may cause damage to both lathe and chuck therefore you will have to know the thread of the spindle accurately.
A reference to quickly distinguish between Unified (UNC or UNF) and British (BSF or BSW) standards:


FLAT TOP = 60° angle (UNC, UNF, Metric threads)       ROUND TOP = 55° angle: Whitworth, BSW, BSF 

 









Terms:
BSF: British Standard Fine
BSW: British Standard Whitworth
RH: Right hand
LH: Left hand
TPI: Threads per inch
UN: Unified National Standard
UNC: Unified Coarse Standard
UNF: Unified Fine Standard
UNS: Unified Special

These thread sizes listed are the size which the adaptor converts to (e.g. The thread size listed in the table should match the thread size on your lathe spindle.)


Chuck Inserts from NOVA

SKU
Thread
Diam.
Pitch
Thread
Direction
Standard
Compatible
Lathes
Set Screw
I2NS
M20
2


 Tyme Cub

I3NS
M20
1.5


 Electra Beckum,
Multico Sumaro

I6NS
3/4″
Plain Bore

 M6
I7NS
1 1/8″
8TPI

UN(NOT UNC)


I8NS
7/8″
12TPI
LH
NS


I9NS
3/4″
16TPI
RH

(with 6mm register)

IANS
3/4″
4TPI
RH
BSP
 TL1000 (pre 1986)

IBNS
3/4″
4TPI
LH
BSP
 TL1000 (pre 1986)

ICNS
1″
10TPI
RH
BSF
 TL1000, Woodfast/Durden

IDNS
1″
8TPI
RH
UNC
 Delta, Rockwell, Golding,
General, NOVA Comet (North America)
and Mercury lathes

IENS
1″
12TPI
RH
UNF
 Myford ML8
Turnstyler

IFNS
5/8″
Plain Bore
Shopsmith

IHNS
3/4″
10TPI
RH
BSW
 Rockwell
Homecraft

IINS
M24
3
RH

 B-Line
Arundel K600/K450

IJNS
1 1/8″
12TPI
RH
 BSW
 Myford Mystro
Masterlathe (New Zealand)

IKNS
M18
2.5
RH

 Elu DB 180

ILNS
1 1/4″
8TPI
RH

 NOVA Galaxi, NOVA Saturn, NOVA DVR 3000, NOVA XP, NOVA 1624 and 1624 II (North America),
Laguna Revo
 M6
IMNS
1″
10TPI
LH
BSF
 TL1000
Woodfast/Durden

INNS
Blank (Can be threaded up to 28mm)
IONS
1 1/8″
7TPI
RH
BSW
Morton

IQNS
M30
3.5
RH

NOVA TL1500/3000/Comet
(European & Southern Hemisphere)
Woodfast

IRNS
1″
8TPI
RH

Jet 1221 Lathe

ISNS
5/8″
Plain Bore
Designed Specifically for
Shopsmith Pro V and
Power Pro Machines
 M6
ITNS
1″
8TPI
Dual Threaded LH and RH

NOVA Mercury Mini Lathe

IUNS
1 1/8″
12TPI
RH
UNF
Taiwanese lathes

IVNS
7/8″
14TPI
RH
NF


IYNS
1 1/4″
8TPI
RH

For lathes don’t
have reverse turning ability

IWNS
M25
2
RH

 Tyme Avon (’83 on) and Classic Tanner SD165, Selbix Springwood, Sorby, Cotech

IXNS
1″
8TPI
RH

Designed specifically for the
NOVA Comet II Midi Lathe,
features lock for the reverse function.
 M6