Expanding Mandrels

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Expanding Mandrels are used to hold a workpiece on it's bore enabling the outside to be turned. Working in a similar way to a split collet (only the other way round!), a split sleeve is mounted in the bore of the workpiece and expanded to grip the bore via an internal taper.

Since the sleeve is split from both ends it expands equally along it's length when tightened onto the tapered pin.

Note: These products are not designed for use in the jewellery industry.

Straight Shank Expanding Mandrels (Tap On / Tap Off )

Exp-Mandrel-SS-Tap-on

These simple straight shank Expanding Mandrels are designed to be driven between centres.

Code Effective
Range		 Overall
Length		 Sleeve
Length		 Number of
Sleeves
050-120-00100 1/2" - 9/16"
(12.7 - 14.3mm)		 5" 2.1/2" 1
050-120-00110 9/16" - 21/32"
(14.3 - 16.7mm)		 6" 2.3/4" 1
050-120-00100 Expanding Mandrels 1/2"-9/16" - Tap-On/Tap-Off £21.85 In Stock Qty:
050-120-00110 Expanding Mandrels 9/16"-21/32" - Tap-On/Tap-Off £24.80 In Stock Qty:

Straight Shank Expanding Mandrels (Quick Release)

Expanding-Mandrel-SS-QR

These straight shank Expanding Mandrels can be driven between centres or held in a 3 jaw chuck. Each sleeve has a range of 0.5mm and is mounted in the eccentric ring machined in the front of the knurled quick release nut which screws onto the taper of the main body. (Like an ER collet only in reverse)

Code Sleeve
Sizes		 Effective
Range		 Overall
Length		 Shank
Diameter		 Sleeve
Length		 Number of
Sleeves
050-120-01100 5.5-7.0mm 5.5-7.5mm 74.5mm 10mm 12mm 4
050-120-01110 7.5-9.0mm 7.5-9.5mm 79.5mm 12mm 16mm 4
050-120-01120 9.5-11.5mm 9.5-12.0mm 89.5mm 12mm 20mm 5
050-120-01130 12.0-14.5mm 12.0-15.0mm 97.5mm 14mm 26mm 6
050-120-01140 14.5-19.0mm 14.5-19.5mm 102.5mm 18mm 30mm 10
050-120-01150 19.5-24.5mm 19.5-25.0mm 113.5mm 20mm 36mm 11
050-120-01100 Expanding Mandrels 5.5-7.0mm - Straight Shank, Quick Release £38.50 In Stock Qty:
050-120-01110 Expanding Mandrels 7.5-9.0mm - Straight Shank, Quick Release £39.70 In Stock Qty:
050-120-01120 Expanding Mandrels 9.5-11.5mm -Straight Shank, Quick Release £47.20 In Stock Qty:
050-120-01130 Expanding Mandrels 12.0-14.5mm Straight Shank, Quick Release £57.50 In Stock Qty:
050-120-01140 Expanding Mandrels 14.5-19.0mm Straight Shank, Quick Release £86.30 In Stock Qty:
050-120-01150 Expanding Mandrels 19.5-24.5mm Straight Shank, Quick Release £100.00 In Stock Qty:

MT2 Expanding Mandrels (Screw Locking)

Exp-Mandrel-MT2-Screw

These morse taper Expanding Mandrels are held directly in the lathe or mill spindle or in a rotary table with an MT2 bore. Each sleeve has a range of 1mm and is locked onto the taper by a screw in the nose of the main body. A ring on the screw locates in an eccentric groove in the front of the sleeve to pull the sleeve back off the taper

Code Sleeve
Sizes		 Effective
Range		 Shank Sleeve
Length		 Number of
Sleeves
050-120-20100 14.7-18.7mm 14.7-19.7mm MT2 35mm 5
050-120-20110 19.7-23.7mm 19.7-24.7mm 40mm
050-120-20120 24.7-28.7mm 24.7-29.7mm 46mm
050-120-20100 Expanding Mandrels 14.7-18.7mm - MT2-M10 - Screw Locking £28.75 In Stock Qty:
050-120-20110 Expanding Mandrels 19.7-23.7mm - MT2-M10 - Screw Locking £31.00 In Stock Qty:
050-120-20120 Expanding Mandrels 24.7-28.7mm - MT2-M10 - Screw Locking £34.50 In Stock Qty:

MT2 Expanding Mandrels (Quick Release)

Exp-Mandrel-MT2-QR

These morse taper Expanding Mandrels are held directly in the lathe or mill spindle or in a rotary table with an MT2 bore. Each sleeve has a range of 0.5mm and is mounted in the eccentric ring machined in the front of the knurled quick release nut which screws onto the taper of the main body. (Like an ER collet only in reverse)

Code Sleeve
Sizes		 Effective
Range		 Shank Sleeve
Length		 Number of
Sleeves
050-120-21100 5.5-7.0mm 5.5-7.5mm MT2
(M10 Thread)		 12mm 4
050-120-21110 7.5-9.0mm 7.5-9.5mm 16mm
050-120-21120 9.5-11.5mm 9.5-12.0mm 20mm 5
050-120-21130 12-14.5mm 12-15.0mm 26mm 6
050-120-21100 Expanding Mandrels 5.5-7.0mm - MT2-M10, Quick Release £38.00 In Stock Qty:
050-120-21110 Expanding Mandrels 7.5-9.0mm - MT2-M10, Quick Release £39.00 In Stock Qty:
050-120-21120 Expanding Mandrels 9.5-11.5mm - MT2-M10, Quick Release £46.00 In Stock Qty:
050-120-21130 Expanding Mandrels 12.0-14.5mm - MT2-M10, Quick Release £57.50 In Stock Qty:

5C Expanding Collets - 25.4mm Long

5C-Expanding-Collet-Set-25

A range of expanding collets with a standard 5C body. The split head has an expansion range of ~0.006" and is expanded from the front by tightening the centrally positioned screw. The soft head can be machined to the required size.

The threaded part is separate to the main body and is fixed via an offset spring loaded screw. This enables the collet to be quickly expanded and released using a suitable quick release 5C fixture.

Code Head
Diameter		 Head
Length
050-060-20100 11.9mm 25.4mm
050-060-20200 20.32mm
050-060-20300 36.5mm
050-060-20400 49.2mm
050-060-20100 5C Expanding Collet 11.9mm Dia x 25.4mm Long £16.20 In Stock Qty:
050-060-20200 5C Expanding Collet 20.32mm Dia x 25.4mm Long £16.75 In Stock Qty:
050-060-20300 5C Expanding Collet 36.5mm Dia x 25.4mm Long £17.60 In Stock Qty:
050-060-20400 5C Expanding Collet 49.2mm Dia x 25.4mm Long £18.10 In Stock Qty:
050-060-20898 5C Expanding Collet Set 11.9-49.2mm Dia x 25.4mm Long £56.00 In Stock Qty:

5C Expanding Collets - 30mm Long

5C-Expanding-Collet-Set-30

A range of expanding collets with a standard 5C body. The split head has an expansion range of ~0.006" and is expanded from the front by tightening the centrally positioned screw. The soft head can be machined to the required size.

The threaded part is separate to the main body and is fixed via an offset spring loaded screw. This enables the collet to be quickly expanded and released using a suitable quick release 5C fixture.

Code Head
Diameter		 Head
Length
050-060-20500 13.15mm 30mm
050-060-20600 21.4mm
050-060-20700 38.1mm
050-060-20800 54mm
050-060-20500 5C Expanding Collet 13.15mm Dia x 30mm Long £18.90 In Stock Qty:
050-060-20600 5C Expanding Collet 21.4mm Dia x 30mm Long £19.50 In Stock Qty:
050-060-20700 5C Expanding Collet 38.1mm Dia x 30mm Long £20.50 In Stock Qty:
050-060-20800 5C Expanding Collet 54mm Dia x 30mm Long £25.80 In Stock Qty:
050-060-20899 5C Expanding Collet Set 13.15-54mm Dia x 30mm Long £72.30 In Stock Qty:
Whilst every effort has been made to make the information and prices correct we cannot
accept any responsibility for inaccuracies. Errors & Omissions Excepted.
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