Lathe Chuck Backplates

All semi-finished backplates require machining to suit the chuck you plan to use. This should be carried out with the backplate mounted on the spindle of the machine.

See David Clark's article "Fitting a chuck to a backplate" from Model Engineers' Workshop No. 141.

Super C6 Backplates

These backplates are completely finished - no turning required.
Material: Cast Iron

Code	No. of Holes	Hole PCD	Register	Suitable For
040-060-11500	3	(108mm)	95mm	3 jaw self-centring Chinese 125mm chucks 4 jaw self-centring Chinese 125mm chucks
040-060-11525	3	(108mm)	92mm	Other chucks with a 92mm register and 3 fixing holes
040-060-11600	4	(108mm)	95mm	4 jaw self-centring Indian 125mm chucks 4 jaw independent Chinese 125mm chucks

Plug Bolts for attachment to the lathe spindle are not supplied with backplates but are available separately.

Suitable for SIEG C6 and Super C6 Lathes

040-060-11500	SC6 Backplate for 3 & 4 Jaw SC 125mm Chuck Reg. 95mm 3 Hole	£19.50	In Stock
040-060-11525	SC6 Backplate for 3 Jaw SC 125mm Chuck Reg. 92mm 3 Hole	£19.50	In Stock
040-060-11600	SC6 Backplate for 4 Jaw IP 125mm Chuck Reg. 95mm 4 Hole	£19.50	Out of Stock	Estimated Back in Stock date: To be advised Notify me when this item is available
SC6-251	SC6 (C6) #251 Set of 3 Plug Bolts	£5.00	Out of Stock	Estimated Back in Stock date: To be advised Notify me when this item is available

C3 100mm Backplate for 3 & 4 Jaw Chucks - Steel

Used as an adaptor on the C3 and similar Mini Lathes when fitting a 100mm chuck

Diameter: 100mm
Register on Back: 55mm - Fits C3 spindle
Register on Front: 72mm - Suitable for most 100mm Chinese chucks
Fixing Holes: 84mm PCD, Suitable for most 100mm Chinese 3 jaw and 4 jaw chucks
Centre Bore: 26.5mm

This backplate is completely finished - no turning required.
Material: Steel

040-060-10100

C3 100mm Backplate for 3 & 4 Jaw Chucks - Steel

£14.00

In Stock

C3 100mm Backplate - Plain - Steel

Used as an adaptor on the C3 and similar Mini Lathes when fitting a 100mm chuck

Diameter: 100mm
Register on Back: 55mm - Fits C3 spindle
Register on Front: None - must be machined to fit chuck
Fixing Holes: None - must be drilled to fit chuck
Centre Bore: 26.5mm

Material: Steel

040-060-10200

C3 100mm Backplate - Plain - Steel

£12.50

In Stock

Backplate MYF 4" 1.1/8"x12TPI - Plain - Steel

Diameter: 4"
Spindle Thread: 1.1/8" x 12TPI

Suitable for Myford lathes

040-060-11200

Backplate MYF 4" 1.1/8"x12TPI - Plain - Steel

£15.50

In Stock

Backplate MYF 5" 1.1/8"x12TPI - Plain - Steel

Diameter: 5"
Spindle Thread: 1.1/8" x 12TPI

Suitable for Myford lathes

040-060-11300

Backplate MYF 5" 1.1/8"x12TPI - Plain - Steel

£16.50

In Stock

Backplate BOX/ATL VIC/SOU 5" 1.1/2"x8TPI - Plain - Steel

Diameter: 5"
Spindle Thread: 1.1/2" x 8TPI

Suitable for Boxford, Atlas, Viceroy and Southbend lathes

040-060-11400

Backplate BOX/ATL VIC/SOU 5" 1.1/2"x8TPI - Plain - Steel

£16.75

In Stock

62mm Sieg C0 Backplates - Steel

Code	Diameter	Spindle Thread	Spindle Register	Chuck Register	Fixing Holes	Fixing Hole PCD
040-060-10900	62mm	M14x1.0mm	ø15mm	ø44mm †	3xM5x0.8mm thread 3x5.5mm clearance	51.5mm
040-060-11000				ø56mm †	4xM5x0.8mm thread	45mm
040-060-11100				Plain	None	-

† Semi-finished backplate - register needs turning to finished size with backplate fitted to your spindle

040-060-10900	Backplate 62mm Sieg C0 M14x1.0mm - Semi-Finished 3 Jaw	£8.50	In Stock
040-060-11000	Backplate 62mm Sieg C0 M14x1.0mm - Semi-Finished 4 Jaw	£8.75	In Stock
040-060-11100	Backplate 62mm Sieg C0 M14x1.0mm - Plain	£7.50	In Stock

62mm Cowells/Unimat Backplates - Steel

Code	Diameter	Spindle Thread	Spindle Register	Chuck Register	Fixing Holes	Fixing Hole PCD
040-060-10300	62mm	M14x1.0mm	ø14mm	ø44mm †	3xM5x0.8 thread 3x5.5mm clearance	£7.50
040-060-10400				ø56mm †	4xM5x0.8mm thread	45mm
040-060-10500				Plain	None	-

† Semi-finished backplate - register needs turning to finished size with backplate fitted to your spindle

040-060-10300	Backplate 62mm Cowells/Unimat M14x1.0mm Semi-Finished 3 Jaw	£8.50	In Stock
040-060-10400	Backplate 62mm Cowells/Unimat M14x1.0mm Semi-Finished 4 Jaw	£8.75	In Stock
040-060-10500	Backplate 62mm Cowells/Unimat M14x1.0mm - Plain	£7.50	In Stock

62mm Peatol/Tiag Backplates - Steel

Code	Diameter	Spindle Thread	Spindle Register	Chuck Register	Fixing Holes	Fixing Hole PCD
040-060-10600	62mm	3/4"x16UNF	ø19mm	ø44mm †	3xM5x0.8mm thread 3x5.5mm clearance	51.5mm
040-060-10700				ø56mm †	4xM5x0.8mm thread	45mm
040-060-10800				Plain	None	-

† Semi-finished backplate - register needs turning to finished size with backplate fitted to your spindle

040-060-10600	Backplate 62mm Peatol/Tiag 3/4"x16UNF - Semi-Finished 3 Jaw	£8.50	In Stock
040-060-10700	Backplate 62mm Peatol/Tiag 3/4"x16UNF - Semi-Finished 4 Jaw	£8.75	In Stock
040-060-10800	Backplate 62mm Peatol/Tiag 3/4"x16UNF - Plain	£7.50	In Stock