Universal Expansion Cylinder Honing Tools Ø 25 ÷ 500 mm
COLMER engine cylinder hones allow honing and finishing engine block cylinders with diameters from Ø 25 to 500 mm and are divided into two categories: portable manual hones for drills and lathes, and automatic expansion hones for cylinder honing machines.
DESCRIPTION
COLMER engine cylinder hones are professional expansion honing tools designed for resizing and finishing the cylinder bores of engine blocks. Each hone head covers a wide adjustable diameter range, and interchangeable honing stone sets allow the same body to handle different bore sizes and surface finish requirements. The range is divided into two macro categories: portable manual hones and automatic expansion hones for cylinder honing machines.
This makes COLMER cylinder honing tools a practical solution for engine rebuilding shops working on anything from small single-cylinder engines to large industrial diesel blocks, with honing diameters from Ø 25 mm up to Ø 500 mm (approx. 1″ to 19.7″) – extendable to larger diameters with dedicated extension rods and stone supports.
MANUAL CYLINDER HONES
COLMER portable manual hones are cylinder honing tools for drill use: they can be driven by ordinary workshop equipment such as hand drills, radial drills, lathes or milling machines. The expansion of the honing stones is controlled manually by the operator, who adjusts the cutting pressure during the honing process.
They are the right choice for workshops that need an accurate, low-investment honing tool for occasional cylinder reconditioning or on-site jobs, without a dedicated honing machine. Five models cover bores from Ø 25 to 500 mm.
AUTOMATIC CYLINDER HONES – COMPATIBLE WITH SUNNEN, BERCO AND COMEC MACHINES
COLMER automatic hones are designed for cylinder honing and lapping machines: the expansion of the honing stones is driven automatically by the machine during the honing cycle, ensuring constant stone pressure, repeatable stock removal and a consistent surface finish from bore to bore.
These hone heads are compatible with Sunnen, Berco and Comec honing machines, so they can be used as a direct tooling alternative on the vertical and horizontal honing machines most commonly found in engine rebuilding shops. The ADS 350SN model is compatible with the Sunnen CK3000 cylinder hone tooling system.
HONING STONES: FOUR ABRASIVE TYPES, GRITS FROM 60 TO 800
COLMER honing stone sets are available in four abrasive types, covering every material commonly found in engine rebuilding: Silicon Carbide for cast iron, brass, bronze and aluminium; Aluminium Oxide for roughing on steel and deburring on all materials; CBN (Borazon) for alloy, hardened, case-hardened, nitrided and stainless steels; Diamond for carbide, chrome, cast iron, glass and ceramic.
Grits range from 60 (roughing) to 800 (fine finishing), in different hardnesses, so the same COLMER hone can go from heavy stock removal to the final plateau-quality surface finish simply by changing the stone set. The stone architecture depends on the model: the COLMER 29 uses a 3-stone system, while the COLMER 350 uses 2 stones with 2 opposed guide shoes for maximum roundness control.
WHY CHOOSE COLMER CYLINDER HONING TOOLS
- One hone body covers a wide diameter range: fewer tools to buy and manage
- Interchangeable honing stone sets for different bore diameters and finishes
- Manual and automatic versions share the same stone-set logic across the range
- Extension rods and stone supports extend the working range up to Ø 500 mm
- Tooling compatible with Sunnen, Berco and Comec machines already in your shop
APPLICATIONS
COLMER engine cylinder hones are used for honing and finishing cylinder bores of car, motorcycle, marine, agricultural and industrial diesel engine blocks, as well as cylinder liners. Manual models are also suited to in-place and bench honing where the block cannot be moved to a honing machine.
FAQ – ENGINE CYLINDER HONES
What is an engine cylinder hone used for?
A cylinder hone removes a controlled amount of material from the cylinder bore to restore roundness and straightness and to create the correct cross-hatch surface finish for piston ring seating and oil retention.
Should I choose a manual or an automatic cylinder hone?
Choose a manual hone if you drive it with a drill, radial drill or lathe and adjust stone expansion by hand. Choose an automatic hone if you run a cylinder honing machine (Sunnen, Berco, Comec): the machine controls stone expansion for repeatable results.
Which honing machines are COLMER automatic hones compatible with?
COLMER automatic hone heads are compatible with Sunnen, Berco and Comec cylinder honing machines. The ADS 350SN is compatible with the Sunnen CK3000 tooling system.
Does honing a cylinder make it bigger?
Honing removes only a small, controlled amount of material – typically no more than 0.1–0.2 mm. It is a finishing operation, not a boring operation: the bore diameter increases slightly, which is why honing is used to reach the final tolerance and surface finish after boring, or to recondition a cylinder within its wear limits, with roundness and taper accuracy in the order of 0.002 mm.
What grit honing stones should I use?
COLMER stone sets are available in grits from 60 to 800. As a general rule, coarse grits (60–150) are used for stock removal and deburring, medium grits for reconditioning, and fine grits (400–800) for the final surface finish. The right combination of grit, hardness and abrasive type depends on the cylinder material – our technical staff can recommend the correct stone set for your application.
What cylinder diameters can COLMER hones work on?
The range covers bores from Ø 25 mm to Ø 500 mm (approx. 1″ to 19.7″) across five hone sizes. With optional extension rods and stone supports, the COLMER 350 covers diameters up to Ø 500 mm.
TECHNICAL DATA
| CODE | MODEL | TYPE | DIAMETER | SECTION |
| CH1033 | COLMER 29M | Manual | Ø 25÷33 mm |  |
| CH1044 | COLMER 44M | Manual | Ø 31÷44 mm |  |
| CH1066 | COLMER 66M | Manual | Ø 44÷66 mm |  |
| CH1139 | COLMER 350MC | Manual | Ø 63÷139 mm |  |
| CH1500 | COLMER 350M | Manual | Ø 63÷500 mm |  |
| CH2033 | COLMER 29S | Automatic | Ø 25÷33 mm |  |
| CH2044 | COLMER 44S | Automatic | Ø 31÷44 mm |  |
| CH2066 | COLMER 66S | Automatic | Ø 44÷66 mm | |
| CH2139 | COLMER 350SC | Automatic | Ø 63÷139 mm |  |
| CH2500 | COLMER 350S | Automatic | Ø 63÷500 mm |  |
| CH3505¹ | COLMER ADS 350SN | Automatic | Ø 63÷500 mm |  |
¹ Compatible with cylinder hone Sunnen CK3000
STANDARD EQUIPMENT
- Complete hone body (mandrel body, expansion shaft, assembly housing and expansion mechanism)
- Alignment bushing supplied with each hone, to keep stone and guide perfectly parallel
- Honing stone sets sold separately (see Optionals and Accessories) – select grit and abrasive type according to cylinder material and finish required
OPTIONALS AND ACCESSORIES
Honing stone sets:
- HS2913 – Honing stones set Ø 25÷28 mm for COLMER 29 – Ref. P13
- HS2914 – Honing stones set Ø 28÷33 mm for COLMER 29 – Ref. P14
- HS4415 – Honing stones set Ø 31÷38 mm for COLMER 44 – Ref. Q15
- HS4416 – Honing stones set Ø 36÷44 mm for COLMER 44 – Ref. Q16
- HS6617 – Honing stones set Ø 44÷51 mm for COLMER 66 – Ref. M17
- HS6618 – Honing stones set Ø 49÷56 mm for COLMER 66 – Ref. M18
- HS6619 – Honing stones set Ø 55÷61 mm for COLMER 66 – Ref. M19
- HS6620 – Honing stones set Ø 61÷66 mm for COLMER 66 – Ref. M20
- HS3504 – Honing stones set Ø 63÷80 mm for COLMER 350 – Ref. R4
- HS3505 – Honing stones set Ø 70÷95 mm for COLMER 350 – Ref. R5
- HS3506 – Honing stones set Ø 95÷139 mm for COLMER 350 – Ref. R6
- HS3507 – Honing stones set Ø 115÷500 mm for COLMER 350 – Ref. R7
Extension rods:
- HS0090 – Extension rods Ø 115÷175 mm
- HS0100 – Extension rods Ø 165÷225 mm
- HS0110 – Extension rods Ø 215÷300 mm
- HS0120 – Extension rods Ø 280÷380 mm
- HS0130 – Extension rods Ø 360÷450 mm
- HS0140 – Extension rods Ø 435÷500 mm
Stone supports:
- HS0500 – Stones support Ø 165÷225 mm
- HS0600 – Stones support Ø 215÷300 mm
- HS0700 – Stones support Ø 280÷380 mm
- HS0800 – Stones support Ø 360÷450 mm
- HS0900 – Stones support Ø 435÷500 mm
Other:
- Double master holder sets (NN type) – recommended for bores longer than 250 mm with diameters over 200 mm
- CAR AT20 honing oil – recommended for all honing operations
- Stone sets available in Silicon Carbide, Aluminium Oxide, CBN (Borazon) or Diamond, grits 60÷800
