Mathey Dearman 4SA Saddle Machine - Manual (Page 4)

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2.0 General Information
2.1 4SA Saddle Machine is designed to rotate a 1 3/8”/35mm diameter 12” long oxy/fuel or plasma machine torch
to cut and/or bevel 20”/ 508mm, 22”/ 558.8mm, 24”/ 609.6mm and 26”/ 660.4mm horizontal nominal size API
line pipe. The machine comes with Spacer Bolts for the above list pipe sizes. Spacer bolts are available for other
pipe or tubing sizes within the machine cutting range.
2.2 Operator Training – The Operator requires no training providing they read and understand the parts and
operating manual. The training mainly involves teaching the operator to smoothly and without hesitation rotate
the crank handle so the oxy/fuel or plasma torch produces a smooth even cut around the pipe.
2.3 Maintenance Personnel – Mathey Dearman offers a training course at its facility on the major machine repairs
at no charge. The parts and operating manual contains information concerning the lubrication and minor repair.
3.0 Installation Spacer Bolts
3.1 Select the correct combination of Spacer Bolts and/or spacers for pipe being cut.
3.2 Install the four (4)combinations of Spacer Bolts and Spacers for the pipe to be cut in the four (4) holes in the 4SA
Machine Saddle (Picture 2 or Figure 5 item 1), with the Spacer End of the Bolts on the Bore (I.D.) side of the
saddle.
3.3 Place the spacer if require on the Spacer Bolt protruding through the top of the Saddle. Secure Spacer Bolts and
Spacers to the Saddle by threading the Hex Nut onto the threaded portion on the topside of Saddle. The hex nut
does not have to be tightened with a wrench as the purpose of the nut is to secure the spacer bolt to the saddle.
20” Pipe 22” Pipe
24” Pipe 26” Pipe
Picture 1 – Spacer Bolt Installation
Spacer Bolt Length Calculation
The correct Spacer length (between outside diameter of pipe and inside diameter of saddle) is 1-1/4”
(31.8mm).
Bore (inside diameter) of 4SA
Machine Saddle 26-1/2” (673mm)
Subtract actual OD of pipe 24” (609.6mm)
Difference 2-1/2” (63.5mm)
Divide Difference by two (2) 2-1/2” ÷ 2 = 1-1/4” (31.8mm