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Most chosen tooled-up solutions

We don't quote a tool. We tool up the component.

Seven complete component packages, and the operation-by-operation tooling behind each one. Every operation below links to the product that runs it, so you can read this either way round: start from your component, or start from the tool.

01 · ENGINE

Cylinder Block Machining

The block is the longest tooling list in the engine and the least forgiving. Liner bore, cam and crank bore, deck face, oil galleries, every one of them feeds the next, so a tooled-up block is a single process, not a shopping list of tools.

Sigma cylinder block tooling set
CYLINDER BLOCK TOOLING · TBD
Operations we tool
  • Liner bore rough to finish boring, then semi-finish to honing
  • Cam & crank bore line boring and reaming
  • Deck face milling and side / mounting face milling
  • Thrust face milling and notch milling
  • Drilling & tapping, bolt holes, oil galleries, dowel holes
  • Chamfering and deburring
Operation → tool
Rough millingØ125 CBN cutter · Vc 600 · fz 0.3
Finish millingØ125 CBN cutter · Vc 550 · fz 0.18
Liner bore roughØ131.5 boring bar · Vc 160 · fz 0.2
Cam bore semi-finishØ49.5 boring bar · Vc 140 · fz 0.2
Deep drillingØ15 drill · Vc 90 · fz 0.2
Finish bore sizingMicro Boring Unit · ±2 µm least count
Multi-step boresCombination boring tool
02 · ENGINE

Cylinder Head

Everything on a head comes back to one relationship: seat concentric to guide. Get it and the valve seals; miss it by a few microns and no amount of downstream accuracy rescues the part. This is the package built around our patented VSVG tooling.

Sigma cylinder head tooling set
CYLINDER HEAD TOOLING · TBD
Operations we tool
  • Parent bore roughing and finish parent bore
  • Valve seat & valve guide boring and reaming
  • Cam bore boring
  • Mounting face finish milling and web milling
  • Drilling, tapping and doweling
  • Core plug boring
2µmRunout achieved on VSVG tooling
1µmInlet straightness against a 10 µm drawing call
Operation → tool
Valve seat & guideVSVG tooling · 2–4 µm runout, patented
Parent bore roughingCombination boring tool
Parent bore finishMicro Boring Unit · ±2 µm
Cam bore boringSamurai AVT bar
Mounting face finishCeramic + CBN cutter
Drilling & tappingKruz / indexable drills
03 · DRIVELINE

Transmission Case

A transmission case is a box of bearing bores that all have to agree with each other. The mounting faces set the datums, the bores carry the gear train, and the whole thing is decided by how few setups you can hold it in.

Housing tooling for boring, milling and drilling operations
TRANSMISSION CASE TOOLING · TBD
Operations we tool
  • Milling of all mounting surfaces
  • Boring, drilling, tapping & reaming
  • Bearing bore rough to finish
  • ID grooving
  • Doweling and location bore machining
  • Applies to case transmission, shifter housing and PTO case housing
Operation → tool
Mounting face millingWENX side & face mill · Ø40–Ø160
Rough face / high feedSDMT high feed · fz up to 2.4 mm
Multi-step boresCombination boring tool
Bearing bore finishMicro Boring Unit · ±2 µm
Long bore stabilitySamurai AVT · stable beyond L/D 4
Drilling & tappingKruz / indexable drills
04 · TRACTOR

Centre Housing & Clutch Housing

Tractor housings are where overhang becomes the whole problem. The bore is deep, the face is far from the spindle nose, and conventional bars start talking back well before you reach the parameters the cycle time was quoted at.

Tractor housing tooling for bores, grooves and sealing faces
CENTRE / CLUTCH HOUSING · TBD
Operations we tool
  • Face milling of all mounting faces
  • Anti-vibration long boring
  • Drilling, tapping & doweling
  • Coaxial bore alignment across the housing
  • Boring operations rough to finish
  • Covers centre housing, clutch housing, LB housing and hydraulic lift housing
24×Samurai damping vs conventional AVT
4L/D beyond which conventional bars lose stability
Operation → tool
Long / deep boringSamurai AVT · WL/D 6 to 12
Large bore roughingTwin Leaf boring head · Ø200–Ø1080
Bore finish sizingMicro Boring Unit · ±2 µm
Face millingWENX side & face mill
Drilling & tappingKruz drills · L/D to 10×
05 · AXLE

Differential Carrier

Pinion face, pinion bores inside and out, the differential bore and its thread, four features that have to be true to one axis. Tool it as a set and the axis is established once; tool it piecemeal and you inherit every setup error in the process.

Differential carrier tooling for pinion and differential bores
DIFFERENTIAL CARRIER · TBD
Operations we tool
  • Milling of pinion face
  • Pinion inner & outer boring
  • Differential bore machining
  • Differential bore threading
  • Face milling, drilling & tapping
  • Oil groove machining and ID grooving
Operation → tool
Pinion inner & outer boreCombination boring tool · single pass
Differential bore finishMicro Boring Unit · ±2 µm
Pinion face millingSDMT high feed
Large bore roughingTwin Leaf boring head
Deep bore stabilitySamurai AVT
ID groovingRing groove tools
06 · AXLE

Differential Case

The internal spherical seating is the feature that decides this component, and it is machined blind, through a window, with the tool reaching well past comfortable overhang. Everything else on the case is straightforward by comparison.

Case differential tooling set
DIFFERENTIAL CASE · TBD
Operations we tool
  • Internal spherical seating
  • Pinion shaft hole drilling & boring
  • Face milling of all mounting surfaces
  • Boring, drilling, tapping & reaming
  • ID grooving
  • Differential housing bore and axle tube boring on the banjo drive
Operation → tool
Internal spherical seatingSpecial form tool · to drawing
Deep / blind boringSamurai AVT · stable beyond L/D 4
ID groovingRing groove tools
Pinion shaft hole drillingSPMG / indexable drill · Ø13–Ø50
Bore finish sizingMicro Boring Unit
07 · TRACTOR

Gear Case & Cover

Timing gear case and covers look simple until you count the operations: a large sealing face that has to be flat, a set of bores that have to be round and concentric, and a bolt pattern that has to land on both. Volume makes the cost per edge matter here more than anywhere.

Gear case and cover tooling for face milling and boring
GEAR CASE / COVER · TBD
Operations we tool
  • Timing gear case face milling
  • Boring operations, rough to finish
  • Drilling, tapping & doweling
  • Oil seal bore finishing
  • Milling of mating and sealing faces
  • Covers timing gear case, gear cover and flywheel housing
Operation → tool
Sealing face millingWENX side & face mill · 6 edges per insert
Rough face millingSDMT high feed
Bore rough to finishCombination boring tool
Oil seal bore finishMicro Boring Unit · ±2 µm
Drilling & tappingKruz drills
Where to go next

Same process, whichever end you start from.